<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019eb289-8f50-719d-8d59-e47fd1cf854a,g:73dd1c5f-2cc7-4340-b33f-c5d9917769ce-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.opc.com/role/CoverPage" xlink:type="simple" xlink:href="opc-20260630.xsd#CoverPage"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019eb289-9021-7b6b-9b06-22ee21c46c52" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_DocumentType_019eb289-9021-7b6b-9b06-22ee21c46c52" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019eb289-9021-7f8b-abc7-5b6208ad32dc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_DocumentQuarterlyReport_019eb289-9021-7f8b-abc7-5b6208ad32dc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019eb289-9021-7223-b3d6-252c1b124142" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_DocumentPeriodEndDate_019eb289-9021-7223-b3d6-252c1b124142" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019eb289-9021-762d-b472-7fdb8e69b45a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_DocumentTransitionReport_019eb289-9021-762d-b472-7fdb8e69b45a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019eb289-9021-7906-a08f-2acb6fc5185c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityFileNumber_019eb289-9021-7906-a08f-2acb6fc5185c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019eb289-9021-7c4d-8383-9b4992ea019d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityRegistrantName_019eb289-9021-7c4d-8383-9b4992ea019d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019eb289-9021-7f20-ac00-2422d130bc04" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019eb289-9021-7f20-ac00-2422d130bc04" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019eb289-9021-729f-b289-c272908e1ab6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityTaxIdentificationNumber_019eb289-9021-729f-b289-c272908e1ab6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019eb289-9021-7109-9f2e-2fb4eb127aee" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityAddressAddressLine1_019eb289-9021-7109-9f2e-2fb4eb127aee" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019eb289-9021-7f98-b74a-3039fcf1f6c2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityAddressCityOrTown_019eb289-9021-7f98-b74a-3039fcf1f6c2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019eb289-9021-7687-bc25-34993de0f384" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityAddressStateOrProvince_019eb289-9021-7687-bc25-34993de0f384" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019eb289-9021-7c37-b61d-202c6fe33e4c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityAddressPostalZipCode_019eb289-9021-7c37-b61d-202c6fe33e4c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019eb289-9021-7f04-9087-b1e4fcf4b281" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_CityAreaCode_019eb289-9021-7f04-9087-b1e4fcf4b281" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019eb289-9021-7681-b557-0b5df49f3bbe" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_LocalPhoneNumber_019eb289-9021-7681-b557-0b5df49f3bbe" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019eb289-9021-723f-b999-7ca4f7b380bb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityCurrentReportingStatus_019eb289-9021-723f-b999-7ca4f7b380bb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019eb289-9021-790d-bb5a-f8d3a6dbf7b2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityInteractiveDataCurrent_019eb289-9021-790d-bb5a-f8d3a6dbf7b2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019eb289-9021-755b-ba1d-410b98f33e15" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityFilerCategory_019eb289-9021-755b-ba1d-410b98f33e15" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019eb289-9021-7d5d-9fb3-bd3162366562" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntitySmallBusiness_019eb289-9021-7d5d-9fb3-bd3162366562" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019eb289-9021-7cf4-b167-8874b253f20e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityEmergingGrowthCompany_019eb289-9021-7cf4-b167-8874b253f20e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019eb289-9021-7a51-b107-acdd81feeb8a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityShellCompany_019eb289-9021-7a51-b107-acdd81feeb8a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019eb289-9021-7136-92bf-d828f6608886" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019eb289-9021-7136-92bf-d828f6608886" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019eb289-9021-7ad4-be79-87f5a1e488f6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_EntityCentralIndexKey_019eb289-9021-7ad4-be79-87f5a1e488f6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019eb289-9021-78ca-84fa-72d85710067f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_AmendmentFlag_019eb289-9021-78ca-84fa-72d85710067f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019eb289-9021-7ddd-a615-6a2be67a8b2a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:presentationArc order="24" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_CurrentFiscalYearEndDate_019eb289-9021-7ddd-a615-6a2be67a8b2a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019eb289-9021-788b-b1ba-a7e6521e3133" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:presentationArc order="25" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_DocumentFiscalYearFocus_019eb289-9021-788b-b1ba-a7e6521e3133" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019eb289-9021-7129-94ee-5b15925ec398" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:presentationArc order="26" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb289-9021-7a59-a16b-3cbea2892ca6" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019eb289-9021-7129-94ee-5b15925ec398" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="opc-20260630.xsd#ConsolidatedBalanceSheetsUnaudited"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_019eb289-9021-7844-85cb-b26b5d207c35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019eb289-9021-7c2e-bfb5-f00b25450596" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_019eb289-9021-7844-85cb-b26b5d207c35" xlink:to="loc_us-gaap_AssetsAbstract_019eb289-9021-7c2e-bfb5-f00b25450596" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract_019eb289-9021-71a0-be2d-cb623cb8fb79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_019eb289-9021-7c2e-bfb5-f00b25450596" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract_019eb289-9021-71a0-be2d-cb623cb8fb79" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService_019eb289-9021-75a0-87e6-5f3d2886d8f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract_019eb289-9021-71a0-be2d-cb623cb8fb79" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService_019eb289-9021-75a0-87e6-5f3d2886d8f5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_019eb289-9021-723b-b99f-b9907ebaff7f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract_019eb289-9021-71a0-be2d-cb623cb8fb79" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_019eb289-9021-723b-b99f-b9907ebaff7f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation_019eb289-9021-7b2f-860e-ebb43d7b98a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract_019eb289-9021-71a0-be2d-cb623cb8fb79" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation_019eb289-9021-7b2f-860e-ebb43d7b98a0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceNet_019eb289-9021-7937-bb72-09bcc5444027" xlink:href="opc-20260630.xsd#opc_PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceNet"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract_019eb289-9021-71a0-be2d-cb623cb8fb79" xlink:to="loc_opc_PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceNet_019eb289-9021-7937-bb72-09bcc5444027" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NuclearFuelNetOfAmortization_019eb289-9021-77dc-a22b-0d1e09dbb299" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NuclearFuelNetOfAmortization"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract_019eb289-9021-71a0-be2d-cb623cb8fb79" xlink:to="loc_us-gaap_NuclearFuelNetOfAmortization_019eb289-9021-77dc-a22b-0d1e09dbb299" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress_019eb289-9021-7866-ab28-2e83f0457660" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract_019eb289-9021-71a0-be2d-cb623cb8fb79" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress_019eb289-9021-7866-ab28-2e83f0457660" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_019eb289-9021-7f5a-8db6-20e77d15cc1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNetAbstract_019eb289-9021-71a0-be2d-cb623cb8fb79" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_019eb289-9021-7f5a-8db6-20e77d15cc1a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_InvestmentsAndFundsAbstract_019eb289-9021-7e26-b6d4-68b3275ede27" xlink:href="opc-20260630.xsd#opc_InvestmentsAndFundsAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_019eb289-9021-7c2e-bfb5-f00b25450596" xlink:to="loc_opc_InvestmentsAndFundsAbstract_019eb289-9021-7e26-b6d4-68b3275ede27" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NuclearDecommissioningTrustFundsFairValue_019eb289-9021-7109-ada9-aa6a212d8486" xlink:href="opc-20260630.xsd#opc_NuclearDecommissioningTrustFundsFairValue"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_InvestmentsAndFundsAbstract_019eb289-9021-7e26-b6d4-68b3275ede27" xlink:to="loc_opc_NuclearDecommissioningTrustFundsFairValue_019eb289-9021-7109-ada9-aa6a212d8486" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019eb289-9021-7668-b5aa-397fb2e3d82f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_InvestmentsAndFundsAbstract_019eb289-9021-7e26-b6d4-68b3275ede27" xlink:to="loc_us-gaap_EquityMethodInvestments_019eb289-9021-7668-b5aa-397fb2e3d82f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesNoncurrent_019eb289-9021-749d-b5ca-5ee92b01c169" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MarketableSecuritiesNoncurrent"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_InvestmentsAndFundsAbstract_019eb289-9021-7e26-b6d4-68b3275ede27" xlink:to="loc_us-gaap_MarketableSecuritiesNoncurrent_019eb289-9021-749d-b5ca-5ee92b01c169" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestments_019eb289-9021-7b64-8838-655f8c1015b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermInvestments"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_InvestmentsAndFundsAbstract_019eb289-9021-7e26-b6d4-68b3275ede27" xlink:to="loc_us-gaap_OtherLongTermInvestments_019eb289-9021-7b64-8838-655f8c1015b0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestments_019eb289-9021-7a67-95d2-0eafcbf3f6eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermInvestments"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_InvestmentsAndFundsAbstract_019eb289-9021-7e26-b6d4-68b3275ede27" xlink:to="loc_us-gaap_LongTermInvestments_019eb289-9021-7a67-95d2-0eafcbf3f6eb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_019eb289-9021-70bf-b8d1-fbe5553b0967" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_019eb289-9021-7c2e-bfb5-f00b25450596" xlink:to="loc_us-gaap_AssetsCurrentAbstract_019eb289-9021-70bf-b8d1-fbe5553b0967" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019eb289-9021-70b0-bed1-21983da440e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019eb289-9021-70bf-b8d1-fbe5553b0967" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019eb289-9021-70b0-bed1-21983da440e2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_019eb289-9021-7508-afcb-f08954834935" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndInvestmentsCurrent"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019eb289-9021-70bf-b8d1-fbe5553b0967" xlink:to="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_019eb289-9021-7508-afcb-f08954834935" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_019eb289-9021-76db-8ad7-4da266c14157" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermInvestments"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019eb289-9021-70bf-b8d1-fbe5553b0967" xlink:to="loc_us-gaap_ShortTermInvestments_019eb289-9021-76db-8ad7-4da266c14157" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesNetCurrent_019eb289-9021-711e-981d-b774d68e357a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReceivablesNetCurrent"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019eb289-9021-70bf-b8d1-fbe5553b0967" xlink:to="loc_us-gaap_ReceivablesNetCurrent_019eb289-9021-711e-981d-b774d68e357a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventory_019eb289-9021-7dbe-9e3e-21740f1093f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesInventory"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019eb289-9021-70bf-b8d1-fbe5553b0967" xlink:to="loc_us-gaap_PublicUtilitiesInventory_019eb289-9021-7dbe-9e3e-21740f1093f9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019eb289-9021-7082-8a9d-7a772b57f45f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019eb289-9021-70bf-b8d1-fbe5553b0967" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019eb289-9021-7082-8a9d-7a772b57f45f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019eb289-9021-7297-9da9-581486636e05" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019eb289-9021-70bf-b8d1-fbe5553b0967" xlink:to="loc_us-gaap_AssetsCurrent_019eb289-9021-7297-9da9-581486636e05" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCostsAbstract_019eb289-9021-7c49-8ae2-aea59116b79e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredCostsAbstract"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_019eb289-9021-7c2e-bfb5-f00b25450596" xlink:to="loc_us-gaap_DeferredCostsAbstract_019eb289-9021-7c49-8ae2-aea59116b79e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_019eb289-9021-7c8e-8c63-b10d87d6bb2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsNoncurrent"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredCostsAbstract_019eb289-9021-7c49-8ae2-aea59116b79e" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_019eb289-9021-7c8e-8c63-b10d87d6bb2d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrentAndNoncurrent_019eb289-9021-7775-8025-c5ae9f5cbac3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseCurrentAndNoncurrent"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredCostsAbstract_019eb289-9021-7c49-8ae2-aea59116b79e" xlink:to="loc_us-gaap_PrepaidExpenseCurrentAndNoncurrent_019eb289-9021-7775-8025-c5ae9f5cbac3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDeferredCostsNet_019eb289-9021-79e4-9be5-32dae84ef813" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherDeferredCostsNet"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredCostsAbstract_019eb289-9021-7c49-8ae2-aea59116b79e" xlink:to="loc_us-gaap_OtherDeferredCostsNet_019eb289-9021-79e4-9be5-32dae84ef813" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_019eb289-9021-70c7-b867-42bb1a733d1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredCostsAbstract_019eb289-9021-7c49-8ae2-aea59116b79e" xlink:to="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_019eb289-9021-70c7-b867-42bb1a733d1d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019eb289-9021-7865-b1ab-5abff9c6ba7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_019eb289-9021-7c2e-bfb5-f00b25450596" xlink:to="loc_us-gaap_Assets_019eb289-9021-7865-b1ab-5abff9c6ba7e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019eb289-9021-7b99-bdcf-2a4256c52087" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_019eb289-9021-7844-85cb-b26b5d207c35" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019eb289-9021-7b99-bdcf-2a4256c52087" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_CapitalizationAbstract_019eb289-9021-7d63-98bf-578bcb579c90" xlink:href="opc-20260630.xsd#opc_CapitalizationAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019eb289-9021-7b99-bdcf-2a4256c52087" xlink:to="loc_opc_CapitalizationAbstract_019eb289-9021-7d63-98bf-578bcb579c90" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PatronageCapitalAndMembershipFees_019eb289-9021-7f68-8ada-e52bb59e9644" xlink:href="opc-20260630.xsd#opc_PatronageCapitalAndMembershipFees"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_CapitalizationAbstract_019eb289-9021-7d63-98bf-578bcb579c90" xlink:to="loc_opc_PatronageCapitalAndMembershipFees_019eb289-9021-7f68-8ada-e52bb59e9644" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019eb289-9021-7a87-a7dd-b9d37456565e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_CapitalizationAbstract_019eb289-9021-7d63-98bf-578bcb579c90" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019eb289-9021-7a87-a7dd-b9d37456565e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019eb289-9021-7297-bbd9-6b8dd6344401" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_CapitalizationAbstract_019eb289-9021-7d63-98bf-578bcb579c90" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019eb289-9021-7297-bbd9-6b8dd6344401" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ObligationUnderHydroFacilityTransactions_019eb289-9021-7366-9690-487f42f8b4cc" xlink:href="opc-20260630.xsd#opc_ObligationUnderHydroFacilityTransactions"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_CapitalizationAbstract_019eb289-9021-7d63-98bf-578bcb579c90" xlink:to="loc_opc_ObligationUnderHydroFacilityTransactions_019eb289-9021-7366-9690-487f42f8b4cc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OtherCapitalizationObligationsNoncurrent_019eb289-9021-7501-8fd4-693748527a0f" xlink:href="opc-20260630.xsd#opc_OtherCapitalizationObligationsNoncurrent"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_CapitalizationAbstract_019eb289-9021-7d63-98bf-578bcb579c90" xlink:to="loc_opc_OtherCapitalizationObligationsNoncurrent_019eb289-9021-7501-8fd4-693748527a0f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizationLongtermDebtAndEquity_019eb289-9021-7c90-b975-979176f19ae0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizationLongtermDebtAndEquity"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_CapitalizationAbstract_019eb289-9021-7d63-98bf-578bcb579c90" xlink:to="loc_us-gaap_CapitalizationLongtermDebtAndEquity_019eb289-9021-7c90-b975-979176f19ae0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_019eb289-9021-7888-addb-23ef0db5e28b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019eb289-9021-7b99-bdcf-2a4256c52087" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_019eb289-9021-7888-addb-23ef0db5e28b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019eb289-9021-7560-9b88-7e5a84f1d791" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019eb289-9021-7888-addb-23ef0db5e28b" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019eb289-9021-7560-9b88-7e5a84f1d791" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019eb289-9021-7dd6-94b2-8cf65c5bf8cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019eb289-9021-7888-addb-23ef0db5e28b" xlink:to="loc_us-gaap_ShortTermBorrowings_019eb289-9021-7dd6-94b2-8cf65c5bf8cd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019eb289-9021-784a-b8f7-53adea3fa45e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019eb289-9021-7888-addb-23ef0db5e28b" xlink:to="loc_us-gaap_AccountsPayableCurrent_019eb289-9021-784a-b8f7-53adea3fa45e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_019eb289-9021-7c49-8516-dbbc49a8367f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPayableCurrent"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019eb289-9021-7888-addb-23ef0db5e28b" xlink:to="loc_us-gaap_InterestPayableCurrent_019eb289-9021-7c49-8516-dbbc49a8367f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019eb289-9021-750c-a4c5-23abea22df1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019eb289-9021-7888-addb-23ef0db5e28b" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019eb289-9021-750c-a4c5-23abea22df1f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_019eb289-9021-7ac0-b442-9ad5fb12972b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019eb289-9021-7888-addb-23ef0db5e28b" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_019eb289-9021-7ac0-b442-9ad5fb12972b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019eb289-9021-7bd1-9340-fcd7460c2041" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019eb289-9021-7888-addb-23ef0db5e28b" xlink:to="loc_us-gaap_LiabilitiesCurrent_019eb289-9021-7bd1-9340-fcd7460c2041" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_019eb289-9021-7451-97f5-a5f2df892832" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrentAbstract"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019eb289-9021-7b99-bdcf-2a4256c52087" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_019eb289-9021-7451-97f5-a5f2df892832" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_019eb289-9021-7bbf-8bed-fc1d120bad81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationsNoncurrent"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_019eb289-9021-7451-97f5-a5f2df892832" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_019eb289-9021-7bbf-8bed-fc1d120bad81" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019eb289-9021-7eb5-8622-ccc0a8e9513e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_019eb289-9021-7451-97f5-a5f2df892832" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019eb289-9021-7eb5-8622-ccc0a8e9513e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_019eb289-9021-76cf-8d77-2305537cbd39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityNoncurrent"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_019eb289-9021-7451-97f5-a5f2df892832" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_019eb289-9021-76cf-8d77-2305537cbd39" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019eb289-9021-7c96-b5d6-08e456285feb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_019eb289-9021-7451-97f5-a5f2df892832" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019eb289-9021-7c96-b5d6-08e456285feb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_019eb289-9021-7234-9c31-1c3a8a34fe02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_019eb289-9021-7451-97f5-a5f2df892832" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_019eb289-9021-7234-9c31-1c3a8a34fe02" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019eb289-9021-754e-a107-e5cdb86baacc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019eb289-9021-7b99-bdcf-2a4256c52087" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_019eb289-9021-754e-a107-e5cdb86baacc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/ConsolidatedStatementsofRevenuesandExpensesUnaudited" xlink:type="simple" xlink:href="opc-20260630.xsd#ConsolidatedStatementsofRevenuesandExpensesUnaudited"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/ConsolidatedStatementsofRevenuesandExpensesUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract_019eb289-9021-722a-b349-4b611ae8a705" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019eb289-9021-7acc-99cf-1e825a0788be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eb289-9021-722a-b349-4b611ae8a705" xlink:to="loc_us-gaap_StatementTable_019eb289-9021-7acc-99cf-1e825a0788be" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019eb289-9021-7c7c-a4d9-eea112dc8484" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_019eb289-9021-7acc-99cf-1e825a0788be" xlink:to="loc_srt_MajorCustomersAxis_019eb289-9021-7c7c-a4d9-eea112dc8484" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019eb289-9021-72ad-9cb3-cef6d9d3e73e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_MajorCustomersAxis_019eb289-9021-7c7c-a4d9-eea112dc8484" xlink:to="loc_srt_NameOfMajorCustomerDomain_019eb289-9021-72ad-9cb3-cef6d9d3e73e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_CooperativeMembersMember_019eb289-9021-761d-b1c9-ef9f611f6693" xlink:href="opc-20260630.xsd#opc_CooperativeMembersMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_NameOfMajorCustomerDomain_019eb289-9021-72ad-9cb3-cef6d9d3e73e" xlink:to="loc_opc_CooperativeMembersMember_019eb289-9021-761d-b1c9-ef9f611f6693" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NonMembersMember_019eb289-9021-7967-a0ed-de5d293e10dc" xlink:href="opc-20260630.xsd#opc_NonMembersMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_NameOfMajorCustomerDomain_019eb289-9021-72ad-9cb3-cef6d9d3e73e" xlink:to="loc_opc_NonMembersMember_019eb289-9021-7967-a0ed-de5d293e10dc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019eb289-9021-7862-8351-b856131fd8ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_019eb289-9021-7acc-99cf-1e825a0788be" xlink:to="loc_us-gaap_StatementLineItems_019eb289-9021-7862-8351-b856131fd8ee" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_019eb289-9021-75ad-b40d-98430621ff48" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_019eb289-9021-7862-8351-b856131fd8ee" xlink:to="loc_us-gaap_RevenuesAbstract_019eb289-9021-75ad-b40d-98430621ff48" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eb289-9021-7668-8e2c-9454aa257b8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_019eb289-9021-75ad-b40d-98430621ff48" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eb289-9021-7668-8e2c-9454aa257b8d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_019eb289-9021-720a-8099-acc8524e618a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_019eb289-9021-7862-8351-b856131fd8ee" xlink:to="loc_us-gaap_OperatingExpensesAbstract_019eb289-9021-720a-8099-acc8524e618a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseFuelUsed_019eb289-9021-7541-9b30-e3323656b9cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilitiesOperatingExpenseFuelUsed"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019eb289-9021-720a-8099-acc8524e618a" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseFuelUsed_019eb289-9021-7541-9b30-e3323656b9cc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseProductsAndServices_019eb289-9021-798f-8140-ed1b1a3eb40b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilitiesOperatingExpenseProductsAndServices"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019eb289-9021-720a-8099-acc8524e618a" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseProductsAndServices_019eb289-9021-798f-8140-ed1b1a3eb40b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_019eb289-9021-7575-a539-b307ac403152" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019eb289-9021-720a-8099-acc8524e618a" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_019eb289-9021-7575-a539-b307ac403152" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilitiesOperatingExpensePurchasedPower_019eb289-9021-759c-b245-85b15d481b16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilitiesOperatingExpensePurchasedPower"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019eb289-9021-720a-8099-acc8524e618a" xlink:to="loc_us-gaap_UtilitiesOperatingExpensePurchasedPower_019eb289-9021-759c-b245-85b15d481b16" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationAccretionExpense_019eb289-9021-737f-b3fa-b2b8eef9442d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationAccretionExpense"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019eb289-9021-720a-8099-acc8524e618a" xlink:to="loc_us-gaap_AssetRetirementObligationAccretionExpense_019eb289-9021-737f-b3fa-b2b8eef9442d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilitiesOperatingExpense_019eb289-9021-7463-8839-ef3abe6a2162" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilitiesOperatingExpense"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019eb289-9021-720a-8099-acc8524e618a" xlink:to="loc_us-gaap_UtilitiesOperatingExpense_019eb289-9021-7463-8839-ef3abe6a2162" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019eb289-9021-77db-92b3-8f1cf062b504" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_019eb289-9021-7862-8351-b856131fd8ee" xlink:to="loc_us-gaap_OperatingIncomeLoss_019eb289-9021-77db-92b3-8f1cf062b504" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eb289-9021-7835-8361-91f691da4117" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpenseAbstract"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_019eb289-9021-7862-8351-b856131fd8ee" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eb289-9021-7835-8361-91f691da4117" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_InvestmentIncomeNetAndGainLoss_019eb289-9021-734e-827a-8c1f9a249763" xlink:href="opc-20260630.xsd#opc_InvestmentIncomeNetAndGainLoss"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eb289-9021-7835-8361-91f691da4117" xlink:to="loc_opc_InvestmentIncomeNetAndGainLoss_019eb289-9021-734e-827a-8c1f9a249763" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019eb289-9021-7896-a9f5-c92c89e0674d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eb289-9021-7835-8361-91f691da4117" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019eb289-9021-7896-a9f5-c92c89e0674d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019eb289-9021-7009-aefb-a5eaf8a53e68" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eb289-9021-7835-8361-91f691da4117" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019eb289-9021-7009-aefb-a5eaf8a53e68" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDebtExpenseAbstract_019eb289-9021-75e1-ac4e-50dd9686daef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestAndDebtExpenseAbstract"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_019eb289-9021-7862-8351-b856131fd8ee" xlink:to="loc_us-gaap_InterestAndDebtExpenseAbstract_019eb289-9021-75e1-ac4e-50dd9686daef" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019eb289-9021-7d7c-8329-73a3cc12850d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InterestAndDebtExpenseAbstract_019eb289-9021-75e1-ac4e-50dd9686daef" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019eb289-9021-7d7c-8329-73a3cc12850d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_AllowanceForDebtFundsUsedDuringConstruction_019eb289-9021-7b1e-a11a-ddb7f4e43389" xlink:href="opc-20260630.xsd#opc_AllowanceForDebtFundsUsedDuringConstruction"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InterestAndDebtExpenseAbstract_019eb289-9021-75e1-ac4e-50dd9686daef" xlink:to="loc_opc_AllowanceForDebtFundsUsedDuringConstruction_019eb289-9021-7b1e-a11a-ddb7f4e43389" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019eb289-9021-73f2-a386-5a46e49a083e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InterestAndDebtExpenseAbstract_019eb289-9021-75e1-ac4e-50dd9686daef" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019eb289-9021-73f2-a386-5a46e49a083e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDebtExpense_019eb289-9021-7034-9133-07d360360b39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestAndDebtExpense"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InterestAndDebtExpenseAbstract_019eb289-9021-75e1-ac4e-50dd9686daef" xlink:to="loc_us-gaap_InterestAndDebtExpense_019eb289-9021-7034-9133-07d360360b39" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019eb289-9021-7fd8-8bf5-bb713a0dfb1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_019eb289-9021-7862-8351-b856131fd8ee" xlink:to="loc_us-gaap_NetIncomeLoss_019eb289-9021-7fd8-8bf5-bb713a0dfb1f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/ConsolidatedStatementsofPatronageCapitalandMembershipFeesUnaudited" xlink:type="simple" xlink:href="opc-20260630.xsd#ConsolidatedStatementsofPatronageCapitalandMembershipFeesUnaudited"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/ConsolidatedStatementsofPatronageCapitalandMembershipFeesUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_opc_ConsolidatedStatementsOfPatronageCapitalAndMembershipFeesAbstract_019eb289-9021-7e87-b1b7-020168c9046c" xlink:href="opc-20260630.xsd#opc_ConsolidatedStatementsOfPatronageCapitalAndMembershipFeesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019eb289-9021-7e6c-acfa-baa6297cd908" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ConsolidatedStatementsOfPatronageCapitalAndMembershipFeesAbstract_019eb289-9021-7e87-b1b7-020168c9046c" xlink:to="loc_us-gaap_StatementTable_019eb289-9021-7e6c-acfa-baa6297cd908" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_MemberCapitalComponentsAxis_019eb289-9021-7ce0-adf4-4c1deefccdd1" xlink:href="opc-20260630.xsd#opc_MemberCapitalComponentsAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_019eb289-9021-7e6c-acfa-baa6297cd908" xlink:to="loc_opc_MemberCapitalComponentsAxis_019eb289-9021-7ce0-adf4-4c1deefccdd1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_MemberCapitalComponentsDomain_019eb289-9021-785c-b9b5-9b0488fe7b56" xlink:href="opc-20260630.xsd#opc_MemberCapitalComponentsDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_MemberCapitalComponentsAxis_019eb289-9021-7ce0-adf4-4c1deefccdd1" xlink:to="loc_opc_MemberCapitalComponentsDomain_019eb289-9021-785c-b9b5-9b0488fe7b56" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PatronageCapitalAndMembershipFeesMember_019eb289-9021-7eff-a40a-fcb5f8a0559a" xlink:href="opc-20260630.xsd#opc_PatronageCapitalAndMembershipFeesMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_MemberCapitalComponentsDomain_019eb289-9021-785c-b9b5-9b0488fe7b56" xlink:to="loc_opc_PatronageCapitalAndMembershipFeesMember_019eb289-9021-7eff-a40a-fcb5f8a0559a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019eb289-9021-7b67-aed8-1b238106d886" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_019eb289-9021-7e6c-acfa-baa6297cd908" xlink:to="loc_us-gaap_StatementLineItems_019eb289-9021-7b67-aed8-1b238106d886" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_IncreaseDecreaseInMembersCapitalRollForward_019eb289-9021-751d-a286-388771fb8716" xlink:href="opc-20260630.xsd#opc_IncreaseDecreaseInMembersCapitalRollForward"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_019eb289-9021-7b67-aed8-1b238106d886" xlink:to="loc_opc_IncreaseDecreaseInMembersCapitalRollForward_019eb289-9021-751d-a286-388771fb8716" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PatronageCapitalAndMembershipFeesEquityNet_019eb289-9021-7b8b-bcdc-2231fb1753e5" xlink:href="opc-20260630.xsd#opc_PatronageCapitalAndMembershipFeesEquityNet"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_IncreaseDecreaseInMembersCapitalRollForward_019eb289-9021-751d-a286-388771fb8716" xlink:to="loc_opc_PatronageCapitalAndMembershipFeesEquityNet_019eb289-9021-7b8b-bcdc-2231fb1753e5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019eb289-9021-71eb-aee7-37272dc31976" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_IncreaseDecreaseInMembersCapitalRollForward_019eb289-9021-751d-a286-388771fb8716" xlink:to="loc_us-gaap_NetIncomeLoss_019eb289-9021-71eb-aee7-37272dc31976" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PatronageCapitalAndMembershipFeesEquityNet_019eb289-9021-7bd3-a57c-fb89dfcb9ab6" xlink:href="opc-20260630.xsd#opc_PatronageCapitalAndMembershipFeesEquityNet"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_IncreaseDecreaseInMembersCapitalRollForward_019eb289-9021-751d-a286-388771fb8716" xlink:to="loc_opc_PatronageCapitalAndMembershipFeesEquityNet_019eb289-9021-7bd3-a57c-fb89dfcb9ab6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/ConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="opc-20260630.xsd#ConsolidatedStatementsofCashFlowsUnaudited"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/ConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_019eb289-9021-7b8b-a12c-3e7e3fdcb151" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfCashFlowsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7f0a-9f4a-afd5d9b56094" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_019eb289-9021-7b8b-a12c-3e7e3fdcb151" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7f0a-9f4a-afd5d9b56094" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019eb289-9021-7278-bb15-4906a640202b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7f0a-9f4a-afd5d9b56094" xlink:to="loc_us-gaap_NetIncomeLoss_019eb289-9021-7278-bb15-4906a640202b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7f0a-9f4a-afd5d9b56094" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DepreciationDepletionAndAmortizationExcludingAccretionAndAmortizationOfDeferredGains_019eb289-9021-750e-97e0-4377cd23fd19" xlink:href="opc-20260630.xsd#opc_DepreciationDepletionAndAmortizationExcludingAccretionAndAmortizationOfDeferredGains"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_opc_DepreciationDepletionAndAmortizationExcludingAccretionAndAmortizationOfDeferredGains_019eb289-9021-750e-97e0-4377cd23fd19" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationAccretionExpense_019eb289-9021-7a5b-8465-08c43b60364c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationAccretionExpense"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_us-gaap_AssetRetirementObligationAccretionExpense_019eb289-9021-7a5b-8465-08c43b60364c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfDeferredHedgeGains_019eb289-9021-7a35-8680-7080aaa03669" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfDeferredHedgeGains"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_us-gaap_AmortizationOfDeferredHedgeGains_019eb289-9021-7a35-8680-7080aaa03669" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_019eb289-9021-702a-b051-5c96a18c26be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_019eb289-9021-702a-b051-5c96a18c26be" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DeferredOutageCosts_019eb289-9021-796a-82c8-ac40cc73632e" xlink:href="opc-20260630.xsd#opc_DeferredOutageCosts"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_opc_DeferredOutageCosts_019eb289-9021-796a-82c8-ac40cc73632e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfInvestments_019eb289-9021-74f5-90cc-b7340f3ed8e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfInvestments"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_us-gaap_GainLossOnSaleOfInvestments_019eb289-9021-74f5-90cc-b7340f3ed8e3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NuclearDecommissionRegulatoryDeferralCosts_019eb289-9021-7f83-a7dc-360dddb4f06a" xlink:href="opc-20260630.xsd#opc_NuclearDecommissionRegulatoryDeferralCosts"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_opc_NuclearDecommissionRegulatoryDeferralCosts_019eb289-9021-7f83-a7dc-360dddb4f06a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_019eb289-9021-7ea8-a9c9-e681821f1ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_019eb289-9021-7ea8-a9c9-e681821f1ef5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInReceivables_019eb289-9021-7bd1-af40-7fefffb6d95b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInReceivables"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_IncreaseDecreaseInReceivables_019eb289-9021-7bd1-af40-7fefffb6d95b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_019eb289-9021-7100-982b-c99424a63bb1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_019eb289-9021-7100-982b-c99424a63bb1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019eb289-9021-795c-bc31-fc75bab020b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019eb289-9021-795c-bc31-fc75bab020b1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019eb289-9021-7fa4-b6b6-71f4396a559f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019eb289-9021-7fa4-b6b6-71f4396a559f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_019eb289-9021-7f6a-9913-66f2891eed0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_019eb289-9021-7f6a-9913-66f2891eed0b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPropertyAndOtherTaxesPayable_019eb289-9021-7eea-80db-aad3fb5e4ca6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPropertyAndOtherTaxesPayable"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_IncreaseDecreaseInPropertyAndOtherTaxesPayable_019eb289-9021-7eea-80db-aad3fb5e4ca6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationCashPaidToSettle_019eb289-9021-7f0a-9f33-cc5aa66877f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationCashPaidToSettle"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_AssetRetirementObligationCashPaidToSettle_019eb289-9021-7f0a-9f33-cc5aa66877f6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019eb289-9021-7dac-8c5a-5563930a1c9b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019eb289-9021-7dac-8c5a-5563930a1c9b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019eb289-9021-751b-8bc5-3e5851a12a21" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019eb289-9021-751b-8bc5-3e5851a12a21" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_019eb289-9021-7e5e-86c4-a2409d4f7f50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019eb289-9021-7b53-9ca5-6c6b77a47c42" xlink:to="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_019eb289-9021-7e5e-86c4-a2409d4f7f50" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_019eb289-9021-72b2-9570-a05e1794ab42" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7fea-94f5-8cb1d8837ac3" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_019eb289-9021-72b2-9570-a05e1794ab42" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019eb289-9021-734e-813a-c8fbb8043235" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019eb289-9021-7f0a-9f4a-afd5d9b56094" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019eb289-9021-734e-813a-c8fbb8043235" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_019eb289-9021-7b8b-a12c-3e7e3fdcb151" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_019eb289-9021-7bd1-9eed-156fd77da04b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_019eb289-9021-7bd1-9eed-156fd77da04b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ProceedsFromNuclearFuelCostsRecovery_019eb289-9021-7447-95c9-ac80a345eca1" xlink:href="opc-20260630.xsd#opc_ProceedsFromNuclearFuelCostsRecovery"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:to="loc_opc_ProceedsFromNuclearFuelCostsRecovery_019eb289-9021-7447-95c9-ac80a345eca1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToInvestInDecommissioningFund_019eb289-9021-7ffa-aec7-1975b5987589" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToInvestInDecommissioningFund"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:to="loc_us-gaap_PaymentsToInvestInDecommissioningFund_019eb289-9021-7ffa-aec7-1975b5987589" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDecommissioningFund_019eb289-9021-7927-bf5a-a29ebdd88839" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromDecommissioningFund"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:to="loc_us-gaap_ProceedsFromDecommissioningFund_019eb289-9021-7927-bf5a-a29ebdd88839" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireMarketableSecurities_019eb289-9021-7bd3-980e-19a7c64ffb97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireMarketableSecurities"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:to="loc_us-gaap_PaymentsToAcquireMarketableSecurities_019eb289-9021-7bd3-980e-19a7c64ffb97" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_019eb289-9021-788f-98b2-8bca87131994" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_019eb289-9021-788f-98b2-8bca87131994" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019eb289-9021-7102-b5e2-be19d3dc34fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019eb289-9021-7102-b5e2-be19d3dc34fc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019eb289-9021-7b14-a3c7-ec8b5042264d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019eb289-9021-7752-9933-c9e4e9ea58fa" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019eb289-9021-7b14-a3c7-ec8b5042264d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019eb289-9021-7df3-890e-d78d16ab2a49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_019eb289-9021-7b8b-a12c-3e7e3fdcb151" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019eb289-9021-7df3-890e-d78d16ab2a49" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019eb289-9021-7b7f-ba94-a812c8c4d7d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019eb289-9021-7df3-890e-d78d16ab2a49" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019eb289-9021-7b7f-ba94-a812c8c4d7d4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019eb289-9021-7d48-8bd0-36eef9fdaa0c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019eb289-9021-7df3-890e-d78d16ab2a49" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019eb289-9021-7d48-8bd0-36eef9fdaa0c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_019eb289-9021-751a-80e8-15f54eaaa315" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromRepaymentsOfCommercialPaper"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019eb289-9021-7df3-890e-d78d16ab2a49" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_019eb289-9021-751a-80e8-15f54eaaa315" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019eb289-9021-74b1-b1a2-be4f597b243f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019eb289-9021-7df3-890e-d78d16ab2a49" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019eb289-9021-74b1-b1a2-be4f597b243f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019eb289-9021-782c-bab4-ee333f42e2df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019eb289-9021-7df3-890e-d78d16ab2a49" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019eb289-9021-782c-bab4-ee333f42e2df" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019eb289-9021-7062-8783-3c8ba21869d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_019eb289-9021-7b8b-a12c-3e7e3fdcb151" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019eb289-9021-7062-8783-3c8ba21869d0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019eb289-9021-7af9-b954-647b626af976" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_019eb289-9021-7b8b-a12c-3e7e3fdcb151" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019eb289-9021-7af9-b954-647b626af976" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019eb289-9021-7262-b5bc-da4d397abc89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_019eb289-9021-7b8b-a12c-3e7e3fdcb151" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019eb289-9021-7262-b5bc-da4d397abc89" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_019eb289-9021-72ef-a1f1-4c7861d8a1bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalCashFlowInformationAbstract"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_019eb289-9021-7b8b-a12c-3e7e3fdcb151" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_019eb289-9021-72ef-a1f1-4c7861d8a1bb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidAbstract_019eb289-9021-79dd-ba87-cc1433b2d0a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPaidAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_019eb289-9021-72ef-a1f1-4c7861d8a1bb" xlink:to="loc_us-gaap_InterestPaidAbstract_019eb289-9021-79dd-ba87-cc1433b2d0a4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet_019eb289-9021-7b31-889d-439b86b5459c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPaidNet"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InterestPaidAbstract_019eb289-9021-79dd-ba87-cc1433b2d0a4" xlink:to="loc_us-gaap_InterestPaidNet_019eb289-9021-7b31-889d-439b86b5459c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019eb289-9021-7e49-821c-84784b16461e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_019eb289-9021-7b8b-a12c-3e7e3fdcb151" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019eb289-9021-7e49-821c-84784b16461e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019eb289-90e6-7ae2-9407-a2debda6ba10" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019eb289-9021-7e49-821c-84784b16461e" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019eb289-90e6-7ae2-9407-a2debda6ba10" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/General" xlink:type="simple" xlink:href="opc-20260630.xsd#General"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/General" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_019eb289-90e6-722d-97c8-86180234d10e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_019eb289-90e6-70b9-8063-8c1592bf10d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_019eb289-90e6-722d-97c8-86180234d10e" xlink:to="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_019eb289-90e6-70b9-8063-8c1592bf10d2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/FairValue" xlink:type="simple" xlink:href="opc-20260630.xsd#FairValue"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/FairValue" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_019eb289-90e6-72bf-9796-bd153b535c4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_019eb289-90e6-7ea9-a8cd-764d0b5235e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosuresTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_019eb289-90e6-72bf-9796-bd153b535c4d" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_019eb289-90e6-7ea9-a8cd-764d0b5235e6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DerivativeInstruments" xlink:type="simple" xlink:href="opc-20260630.xsd#DerivativeInstruments"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DerivativeInstruments" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7d1e-9c89-2034ab5c76ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_019eb289-90e7-7d58-946e-d038ace1bf19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7d1e-9c89-2034ab5c76ca" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_019eb289-90e7-7d58-946e-d038ace1bf19" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/InvestmentSecurities" xlink:type="simple" xlink:href="opc-20260630.xsd#InvestmentSecurities"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/InvestmentSecurities" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-73b3-8aeb-4d3252e5218b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_019eb289-90e7-7983-9c34-e041a079896f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-73b3-8aeb-4d3252e5218b" xlink:to="loc_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_019eb289-90e7-7983-9c34-e041a079896f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RecentlyIssuedorAdoptedAccountingPronouncements" xlink:type="simple" xlink:href="opc-20260630.xsd#RecentlyIssuedorAdoptedAccountingPronouncements"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RecentlyIssuedorAdoptedAccountingPronouncements" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract_019eb289-90e7-7174-8fb9-86a9e714bf2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_019eb289-90e7-7864-819e-cbf898262eb3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract_019eb289-90e7-7174-8fb9-86a9e714bf2f" xlink:to="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_019eb289-90e7-7864-819e-cbf898262eb3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RevenueRecognition" xlink:type="simple" xlink:href="opc-20260630.xsd#RevenueRecognition"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RevenueRecognition" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_019eb289-90e7-7ffc-aef7-919974739374" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerTextBlock_019eb289-90e7-7d63-88c9-f4acd6b6bbda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_019eb289-90e7-7ffc-aef7-919974739374" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerTextBlock_019eb289-90e7-7d63-88c9-f4acd6b6bbda" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/Leases" xlink:type="simple" xlink:href="opc-20260630.xsd#Leases"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/Leases" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAbstract_019eb289-90e7-7fe3-af85-617b0551ba98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeFinanceLeasesTextBlock_019eb289-90e7-7f2b-b103-21032c28eb18" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeFinanceLeasesTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7fe3-af85-617b0551ba98" xlink:to="loc_us-gaap_LesseeFinanceLeasesTextBlock_019eb289-90e7-7f2b-b103-21032c28eb18" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeasesTextBlock_019eb289-90e7-771a-9fa3-aa6c18e01090" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeasesTextBlock"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7fe3-af85-617b0551ba98" xlink:to="loc_us-gaap_LesseeOperatingLeasesTextBlock_019eb289-90e7-771a-9fa3-aa6c18e01090" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_019eb289-90e7-77fc-9d1d-d98006256e5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeasesOfLessorDisclosureTextBlock"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7fe3-af85-617b0551ba98" xlink:to="loc_us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_019eb289-90e7-77fc-9d1d-d98006256e5a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/ContingenciesandRegulatoryMatters" xlink:type="simple" xlink:href="opc-20260630.xsd#ContingenciesandRegulatoryMatters"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/ContingenciesandRegulatoryMatters" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_opc_ContingenciesAndRegulatoryMattersAbstract_019eb289-90e7-7ecf-aba5-9c8721eca3e8" xlink:href="opc-20260630.xsd#opc_ContingenciesAndRegulatoryMattersAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LegalMattersAndContingenciesTextBlock_019eb289-90e7-7149-abee-75d3f661a43c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LegalMattersAndContingenciesTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ContingenciesAndRegulatoryMattersAbstract_019eb289-90e7-7ecf-aba5-9c8721eca3e8" xlink:to="loc_us-gaap_LegalMattersAndContingenciesTextBlock_019eb289-90e7-7149-abee-75d3f661a43c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RestrictedCashandShortTermInvestments" xlink:type="simple" xlink:href="opc-20260630.xsd#RestrictedCashandShortTermInvestments"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RestrictedCashandShortTermInvestments" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedInvestmentsNoteAbstract_019eb289-90e7-75c0-86fa-0bb5d9b9e481" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedInvestmentsNoteAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedAssetsDisclosureTextBlock_019eb289-90e7-72be-9339-5fc6870ae14f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedAssetsDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedInvestmentsNoteAbstract_019eb289-90e7-75c0-86fa-0bb5d9b9e481" xlink:to="loc_us-gaap_RestrictedAssetsDisclosureTextBlock_019eb289-90e7-72be-9339-5fc6870ae14f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RegulatoryAssetsandLiabilities" xlink:type="simple" xlink:href="opc-20260630.xsd#RegulatoryAssetsandLiabilities"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RegulatoryAssetsandLiabilities" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract_019eb289-90e7-78f9-b253-f6a88bd702f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRegulatoryAssetsAndLiabilitiesTextBlock_019eb289-90e7-791a-966e-68b19a2b125e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRegulatoryAssetsAndLiabilitiesTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract_019eb289-90e7-78f9-b253-f6a88bd702f5" xlink:to="loc_us-gaap_ScheduleOfRegulatoryAssetsAndLiabilitiesTextBlock_019eb289-90e7-791a-966e-68b19a2b125e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/MemberPowerBillPrepayments" xlink:type="simple" xlink:href="opc-20260630.xsd#MemberPowerBillPrepayments"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/MemberPowerBillPrepayments" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_opc_MemberPowerBillPrepaymentsAbstract_019eb289-90e7-71da-87c9-b00f4ff92bf0" xlink:href="opc-20260630.xsd#opc_MemberPowerBillPrepaymentsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_MemberPowerBillPrepaymentsDisclosureTextBlock_019eb289-90e7-77a6-9457-394cce3a9c78" xlink:href="opc-20260630.xsd#opc_MemberPowerBillPrepaymentsDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_MemberPowerBillPrepaymentsAbstract_019eb289-90e7-71da-87c9-b00f4ff92bf0" xlink:to="loc_opc_MemberPowerBillPrepaymentsDisclosureTextBlock_019eb289-90e7-77a6-9457-394cce3a9c78" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/Debt" xlink:type="simple" xlink:href="opc-20260630.xsd#Debt"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/Debt" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract_019eb289-90e7-7878-b24f-43679e143b86" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_019eb289-90e7-7468-9561-17da5dabfd22" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_019eb289-90e7-7878-b24f-43679e143b86" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_019eb289-90e7-7468-9561-17da5dabfd22" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/MeasurementofCreditLossesonFinancialInstruments" xlink:type="simple" xlink:href="opc-20260630.xsd#MeasurementofCreditLossesonFinancialInstruments"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/MeasurementofCreditLossesonFinancialInstruments" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_019eb289-90e7-7f1c-84ca-9bda43543352" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForCreditLossesTextBlock_019eb289-90e7-7151-a8ae-039630f78a01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForCreditLossesTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_019eb289-90e7-7f1c-84ca-9bda43543352" xlink:to="loc_us-gaap_AllowanceForCreditLossesTextBlock_019eb289-90e7-7151-a8ae-039630f78a01" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/AssetRetirementObligations" xlink:type="simple" xlink:href="opc-20260630.xsd#AssetRetirementObligations"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/AssetRetirementObligations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationDisclosureAbstract_019eb289-90e7-789a-a71e-e6941ac60d14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationDisclosureTextBlock_019eb289-90e7-70df-b856-930a5ebeb838" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetRetirementObligationDisclosureAbstract_019eb289-90e7-789a-a71e-e6941ac60d14" xlink:to="loc_us-gaap_AssetRetirementObligationDisclosureTextBlock_019eb289-90e7-70df-b856-930a5ebeb838" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/SmarrCombinedCycleProject" xlink:type="simple" xlink:href="opc-20260630.xsd#SmarrCombinedCycleProject"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/SmarrCombinedCycleProject" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatedOperationsAbstract_019eb289-90e7-7c88-8149-34adf54715a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatedOperationsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesDisclosureTextBlock_019eb289-90e7-7c14-bfc7-a2aaa30d4d27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatedOperationsAbstract_019eb289-90e7-7c88-8149-34adf54715a8" xlink:to="loc_us-gaap_PublicUtilitiesDisclosureTextBlock_019eb289-90e7-7c14-bfc7-a2aaa30d4d27" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/TalbotCombustionTurbineUnitNo7" xlink:type="simple" xlink:href="opc-20260630.xsd#TalbotCombustionTurbineUnitNo7"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/TalbotCombustionTurbineUnitNo7" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAndAssetAcquisitionAbstract_019eb289-90e7-71d8-8ea8-ed8953d8e2a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationAndAssetAcquisitionAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesDisclosureTextBlock_019eb289-90e7-7f84-99f7-e0c51ae75188" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationAndAssetAcquisitionAbstract_019eb289-90e7-71d8-8ea8-ed8953d8e2a5" xlink:to="loc_us-gaap_PublicUtilitiesDisclosureTextBlock_019eb289-90e7-7f84-99f7-e0c51ae75188" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/SpentNuclearFuelStorageCosts" xlink:type="simple" xlink:href="opc-20260630.xsd#SpentNuclearFuelStorageCosts"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/SpentNuclearFuelStorageCosts" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_019eb289-90e7-776e-abec-f5b99d6c1e73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_019eb289-90e7-7cf6-86e8-f9ee57a2e620" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_019eb289-90e7-776e-abec-f5b99d6c1e73" xlink:to="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_019eb289-90e7-7cf6-86e8-f9ee57a2e620" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/ReportableSegmentInformation" xlink:type="simple" xlink:href="opc-20260630.xsd#ReportableSegmentInformation"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/ReportableSegmentInformation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingAbstract_019eb289-90e7-70e4-82d7-b5bd7c7fbfed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_019eb289-90e7-7413-8ed0-afa5bbf4ac2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingDisclosureTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_019eb289-90e7-70e4-82d7-b5bd7c7fbfed" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_019eb289-90e7-7413-8ed0-afa5bbf4ac2a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/GeneralPolicies" xlink:type="simple" xlink:href="opc-20260630.xsd#GeneralPolicies"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/GeneralPolicies" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_019eb289-90e6-709d-8f0f-b808deba0945" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_019eb289-90e6-7f74-af2e-03d13a52cacf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_019eb289-90e6-709d-8f0f-b808deba0945" xlink:to="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_019eb289-90e6-7f74-af2e-03d13a52cacf" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/FairValueTables" xlink:type="simple" xlink:href="opc-20260630.xsd#FairValueTables"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/FairValueTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_019eb289-90e6-712f-81d8-e05659d94885" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_019eb289-90e6-7853-a7f0-79968e3a179c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_019eb289-90e6-712f-81d8-e05659d94885" xlink:to="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_019eb289-90e6-7853-a7f0-79968e3a179c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_019eb289-90e7-760c-a742-e402b9397a80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_019eb289-90e6-712f-81d8-e05659d94885" xlink:to="loc_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_019eb289-90e7-760c-a742-e402b9397a80" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DerivativeInstrumentsTables" xlink:type="simple" xlink:href="opc-20260630.xsd#DerivativeInstrumentsTables"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DerivativeInstrumentsTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7a84-87fe-cb66dbc5294b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPriceRiskDerivativesTableTextBlock_019eb289-90e7-7371-be60-496f813c9bc1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPriceRiskDerivativesTableTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7a84-87fe-cb66dbc5294b" xlink:to="loc_us-gaap_ScheduleOfPriceRiskDerivativesTableTextBlock_019eb289-90e7-7371-be60-496f813c9bc1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_019eb289-90e7-7429-9d13-751d3dad2a0a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7a84-87fe-cb66dbc5294b" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_019eb289-90e7-7429-9d13-751d3dad2a0a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_019eb289-90e7-74ad-9dc0-0501659dd530" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7a84-87fe-cb66dbc5294b" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_019eb289-90e7-74ad-9dc0-0501659dd530" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ScheduleOfDerivativesInstrumentsGainLossInStatementOfFinancialPositionTableTextBlock_019eb289-90e7-726f-a082-228c1537bcf3" xlink:href="opc-20260630.xsd#opc_ScheduleOfDerivativesInstrumentsGainLossInStatementOfFinancialPositionTableTextBlock"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7a84-87fe-cb66dbc5294b" xlink:to="loc_opc_ScheduleOfDerivativesInstrumentsGainLossInStatementOfFinancialPositionTableTextBlock_019eb289-90e7-726f-a082-228c1537bcf3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/InvestmentSecuritiesTables" xlink:type="simple" xlink:href="opc-20260630.xsd#InvestmentSecuritiesTables"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/InvestmentSecuritiesTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-756e-8d50-cc83d07721af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DebtSecuritiesTradingAndEquitySecuritiesFvNiTableTextBlock_019eb289-90e7-7ed5-8fbf-593d2aef496a" xlink:href="opc-20260630.xsd#opc_DebtSecuritiesTradingAndEquitySecuritiesFvNiTableTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-756e-8d50-cc83d07721af" xlink:to="loc_opc_DebtSecuritiesTradingAndEquitySecuritiesFvNiTableTextBlock_019eb289-90e7-7ed5-8fbf-593d2aef496a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RevenueRecognitionTables" xlink:type="simple" xlink:href="opc-20260630.xsd#RevenueRecognitionTables"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RevenueRecognitionTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_019eb289-90e7-7a23-aaf3-413cfc85e2d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_019eb289-90e7-7c2e-b702-7160800f5dd3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_019eb289-90e7-7a23-aaf3-413cfc85e2d8" xlink:to="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_019eb289-90e7-7c2e-b702-7160800f5dd3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/LeasesTables" xlink:type="simple" xlink:href="opc-20260630.xsd#LeasesTables"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/LeasesTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAbstract_019eb289-90e7-7420-bdb4-4f184dca43bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeBalanceSheetDisclosuresTableTextBlock_019eb289-90e7-711f-89b0-6857c5b0413b" xlink:href="opc-20260630.xsd#opc_LesseeBalanceSheetDisclosuresTableTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7420-bdb4-4f184dca43bd" xlink:to="loc_opc_LesseeBalanceSheetDisclosuresTableTextBlock_019eb289-90e7-711f-89b0-6857c5b0413b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCostTableTextBlock_019eb289-90e7-7bba-b9a0-d15ece540f20" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCostTableTextBlock"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7420-bdb4-4f184dca43bd" xlink:to="loc_us-gaap_LeaseCostTableTextBlock_019eb289-90e7-7bba-b9a0-d15ece540f20" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeQuantitativeDisclosureForLeasesTableTextBlock_019eb289-90e7-7ab3-a028-14a2bfb1c9df" xlink:href="opc-20260630.xsd#opc_LesseeQuantitativeDisclosureForLeasesTableTextBlock"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7420-bdb4-4f184dca43bd" xlink:to="loc_opc_LesseeQuantitativeDisclosureForLeasesTableTextBlock_019eb289-90e7-7ab3-a028-14a2bfb1c9df" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeMeasurementOfLeaseLiabilitiesTableTextBlock_019eb289-90e7-7074-9575-d53d1b4915cf" xlink:href="opc-20260630.xsd#opc_LesseeMeasurementOfLeaseLiabilitiesTableTextBlock"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7420-bdb4-4f184dca43bd" xlink:to="loc_opc_LesseeMeasurementOfLeaseLiabilitiesTableTextBlock_019eb289-90e7-7074-9575-d53d1b4915cf" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_019eb289-90e7-7293-b13a-31d64a736334" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7420-bdb4-4f184dca43bd" xlink:to="loc_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_019eb289-90e7-7293-b13a-31d64a736334" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_019eb289-90e7-788b-9e05-1916909fb58e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7420-bdb4-4f184dca43bd" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_019eb289-90e7-788b-9e05-1916909fb58e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLeaseIncomeTableTextBlock_019eb289-90e7-71fd-b291-6272700fa6c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLeaseIncomeTableTextBlock"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7420-bdb4-4f184dca43bd" xlink:to="loc_us-gaap_OperatingLeaseLeaseIncomeTableTextBlock_019eb289-90e7-71fd-b291-6272700fa6c4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RestrictedCashandShortTermInvestmentsTables" xlink:type="simple" xlink:href="opc-20260630.xsd#RestrictedCashandShortTermInvestmentsTables"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RestrictedCashandShortTermInvestmentsTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedInvestmentsNoteAbstract_019eb289-90e7-7c4c-b690-b1b88876ba1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedInvestmentsNoteAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_019eb289-90e7-7616-b59d-e4e63535af4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedInvestmentsNoteAbstract_019eb289-90e7-7c4c-b690-b1b88876ba1a" xlink:to="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_019eb289-90e7-7616-b59d-e4e63535af4e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RegulatoryAssetsandLiabilitiesTables" xlink:type="simple" xlink:href="opc-20260630.xsd#RegulatoryAssetsandLiabilitiesTables"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RegulatoryAssetsandLiabilitiesTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract_019eb289-90e7-7c65-8197-95ccf25e4740" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTableTextBlock_019eb289-90e7-77af-8bf4-6a8aeb7edb89" xlink:href="opc-20260630.xsd#opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTableTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract_019eb289-90e7-7c65-8197-95ccf25e4740" xlink:to="loc_opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTableTextBlock_019eb289-90e7-77af-8bf4-6a8aeb7edb89" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/GeneralDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#GeneralDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/GeneralDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_019eb289-90e6-7552-92e0-8e60c17ed359" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NumberOfElectricDistributionCooperativeMembers_019eb289-90e6-7302-aeb5-46ae6989c819" xlink:href="opc-20260630.xsd#opc_NumberOfElectricDistributionCooperativeMembers"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_019eb289-90e6-7552-92e0-8e60c17ed359" xlink:to="loc_opc_NumberOfElectricDistributionCooperativeMembers_019eb289-90e6-7302-aeb5-46ae6989c819" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/FairValueScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#FairValueScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/FairValueScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_019eb289-90e7-79ed-870b-a71af6dc5eeb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019eb289-90e7-7c09-bf06-64d2476005ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_019eb289-90e7-79ed-870b-a71af6dc5eeb" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019eb289-90e7-7c09-bf06-64d2476005ba" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb289-90e7-783c-ad9f-6fc7a9b70007" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019eb289-90e7-7c09-bf06-64d2476005ba" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb289-90e7-783c-ad9f-6fc7a9b70007" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb289-90e7-7a9d-a90e-d8be2e50c57d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb289-90e7-783c-ad9f-6fc7a9b70007" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb289-90e7-7a9d-a90e-d8be2e50c57d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019eb289-90e7-7bee-b8df-46f2eccd890d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb289-90e7-7a9d-a90e-d8be2e50c57d" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019eb289-90e7-7bee-b8df-46f2eccd890d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019eb289-90e7-733e-93d1-19f33a013568" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb289-90e7-7a9d-a90e-d8be2e50c57d" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019eb289-90e7-733e-93d1-19f33a013568" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019eb289-90e7-7174-a5e3-cf1cffb928e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb289-90e7-7a9d-a90e-d8be2e50c57d" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019eb289-90e7-7174-a5e3-cf1cffb928e4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019eb289-90e7-7b35-a59b-918d68d36fd6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019eb289-90e7-7c09-bf06-64d2476005ba" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019eb289-90e7-7b35-a59b-918d68d36fd6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019eb289-90e7-7b35-a59b-918d68d36fd6" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DomesticEquityMember_019eb289-90e7-75a1-bef9-5ccf40a7d43c" xlink:href="opc-20260630.xsd#opc_DomesticEquityMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_opc_DomesticEquityMember_019eb289-90e7-75a1-bef9-5ccf40a7d43c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_019eb289-90e7-7b66-b921-6250440c63f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_019eb289-90e7-7b66-b921-6250440c63f4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019eb289-90e7-7fcb-b288-b16a500c9096" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019eb289-90e7-7fcb-b288-b16a500c9096" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesMember_019eb289-90e7-7db8-9c6c-ce9edeb1a992" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MortgageBackedSecuritiesMember"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_us-gaap_MortgageBackedSecuritiesMember_019eb289-90e7-7db8-9c6c-ce9edeb1a992" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MutualFundMember_019eb289-90e7-7321-866a-2d6d4d73795f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MutualFundMember"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_us-gaap_MutualFundMember_019eb289-90e7-7321-866a-2d6d4d73795f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_019eb289-90e7-7829-b35e-b0e1ddce61e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MunicipalBondsMember"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_us-gaap_MunicipalBondsMember_019eb289-90e7-7829-b35e-b0e1ddce61e9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AgencySecuritiesMember_019eb289-90e7-756b-82bd-9a4b3dd08232" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AgencySecuritiesMember"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_us-gaap_AgencySecuritiesMember_019eb289-90e7-756b-82bd-9a4b3dd08232" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_TreasurySeparateTradingOfRegisteredInterestAndPrincipalOfSecuritiesLongTermMember_019eb289-90e7-7b8d-b8bf-cace4714fcaf" xlink:href="opc-20260630.xsd#opc_TreasurySeparateTradingOfRegisteredInterestAndPrincipalOfSecuritiesLongTermMember"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_opc_TreasurySeparateTradingOfRegisteredInterestAndPrincipalOfSecuritiesLongTermMember_019eb289-90e7-7b8d-b8bf-cace4714fcaf" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NonUsGovernmentBondsAndPrivatePlacementMember_019eb289-90e7-767c-bef6-d1f975b44d79" xlink:href="opc-20260630.xsd#opc_NonUsGovernmentBondsAndPrivatePlacementMember"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_opc_NonUsGovernmentBondsAndPrivatePlacementMember_019eb289-90e7-767c-bef6-d1f975b44d79" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_InternationalMutualFundMember_019eb289-90e7-7b07-b72c-f92fa7db1e07" xlink:href="opc-20260630.xsd#opc_InternationalMutualFundMember"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_opc_InternationalMutualFundMember_019eb289-90e7-7b07-b72c-f92fa7db1e07" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OtherSecuritiesMember_019eb289-90e7-7b2d-8dd0-0deeb17ab9f4" xlink:href="opc-20260630.xsd#opc_OtherSecuritiesMember"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_opc_OtherSecuritiesMember_019eb289-90e7-7b2d-8dd0-0deeb17ab9f4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_TreasurySeparateTradingOfRegisteredInterestAndPrincipalOfSecuritiesShortTermMember_019eb289-90e7-75e8-af07-ef9c56624911" xlink:href="opc-20260630.xsd#opc_TreasurySeparateTradingOfRegisteredInterestAndPrincipalOfSecuritiesShortTermMember"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019eb289-90e7-7fbe-8ba5-f05cede9dcc4" xlink:to="loc_opc_TreasurySeparateTradingOfRegisteredInterestAndPrincipalOfSecuritiesShortTermMember_019eb289-90e7-75e8-af07-ef9c56624911" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-763c-8cd7-341a085ff5c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019eb289-90e7-7c09-bf06-64d2476005ba" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-763c-8cd7-341a085ff5c8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7574-aa11-601d65b074e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-763c-8cd7-341a085ff5c8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7574-aa11-601d65b074e9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019eb289-90e7-7438-9e50-aec3c37804ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityContractMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7574-aa11-601d65b074e9" xlink:to="loc_us-gaap_CommodityContractMember_019eb289-90e7-7438-9e50-aec3c37804ec" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019eb289-90e7-7da3-b000-799061f98d81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019eb289-90e7-7c09-bf06-64d2476005ba" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019eb289-90e7-7da3-b000-799061f98d81" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NuclearDecommissioningTrustFundsFairValue_019eb289-90e7-7428-93b4-831faa721e9b" xlink:href="opc-20260630.xsd#opc_NuclearDecommissioningTrustFundsFairValue"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019eb289-90e7-7da3-b000-799061f98d81" xlink:to="loc_opc_NuclearDecommissioningTrustFundsFairValue_019eb289-90e7-7428-93b4-831faa721e9b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_019eb289-90e7-7955-85c3-4a5053bd43ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019eb289-90e7-7da3-b000-799061f98d81" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_019eb289-90e7-7955-85c3-4a5053bd43ab" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019eb289-90e7-7a50-9d6f-ce26a9dcb4dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019eb289-90e7-7da3-b000-799061f98d81" xlink:to="loc_us-gaap_DerivativeAssets_019eb289-90e7-7a50-9d6f-ce26a9dcb4dc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/FairValueScheduleofEstimatedFairValuesofLongtermDebtIncludingCurrentMaturitiesDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#FairValueScheduleofEstimatedFairValuesofLongtermDebtIncludingCurrentMaturitiesDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/FairValueScheduleofEstimatedFairValuesofLongtermDebtIncludingCurrentMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_019eb289-90e7-7fd2-8aca-707c192abb80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019eb289-90e7-7155-af86-25ed4a61478b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_019eb289-90e7-7fd2-8aca-707c192abb80" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019eb289-90e7-7155-af86-25ed4a61478b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019eb289-90e7-74cf-b453-72ef86a8f7a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019eb289-90e7-7155-af86-25ed4a61478b" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019eb289-90e7-74cf-b453-72ef86a8f7a2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019eb289-90e7-7ca4-918f-67587dd27fbf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019eb289-90e7-74cf-b453-72ef86a8f7a2" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019eb289-90e7-7ca4-918f-67587dd27fbf" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019eb289-90e7-7ecc-80ff-0616bae0ffee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019eb289-90e7-7ca4-918f-67587dd27fbf" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019eb289-90e7-7ecc-80ff-0616bae0ffee" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019eb289-90e7-77b9-acc3-c214c7d9ee1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019eb289-90e7-7ecc-80ff-0616bae0ffee" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019eb289-90e7-77b9-acc3-c214c7d9ee1a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019eb289-90e7-78ab-9588-6e0719d6d88e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019eb289-90e7-7ecc-80ff-0616bae0ffee" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019eb289-90e7-78ab-9588-6e0719d6d88e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb289-90e7-7f92-bcfa-e0400ee1d8a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019eb289-90e7-7155-af86-25ed4a61478b" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb289-90e7-7f92-bcfa-e0400ee1d8a4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb289-90e7-7fe8-9aa8-f96e91927e92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb289-90e7-7f92-bcfa-e0400ee1d8a4" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb289-90e7-7fe8-9aa8-f96e91927e92" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019eb289-90e7-7b91-a125-eaa28813ceab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb289-90e7-7fe8-9aa8-f96e91927e92" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019eb289-90e7-7b91-a125-eaa28813ceab" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019eb289-90e7-7579-a024-bfc963c0c76c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019eb289-90e7-7155-af86-25ed4a61478b" xlink:to="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019eb289-90e7-7579-a024-bfc963c0c76c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019eb289-90e7-7d42-b403-8f9800ed9423" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019eb289-90e7-7579-a024-bfc963c0c76c" xlink:to="loc_us-gaap_LongTermDebtFairValue_019eb289-90e7-7d42-b403-8f9800ed9423" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DerivativeInstrumentsNarrativeDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#DerivativeInstrumentsNarrativeDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DerivativeInstrumentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-71cb-9e84-4a28c0c6d284" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019eb289-90e7-7060-80c0-4fd9c23bab57" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-71cb-9e84-4a28c0c6d284" xlink:to="loc_us-gaap_DerivativeTable_019eb289-90e7-7060-80c0-4fd9c23bab57" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-7d91-92fa-e0a7afe68283" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_019eb289-90e7-7060-80c0-4fd9c23bab57" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-7d91-92fa-e0a7afe68283" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7f5e-aef1-082103d666d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-7d91-92fa-e0a7afe68283" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7f5e-aef1-082103d666d0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019eb289-90e7-7389-b8bb-7dd79bc017e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityContractMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7f5e-aef1-082103d666d0" xlink:to="loc_us-gaap_CommodityContractMember_019eb289-90e7-7389-b8bb-7dd79bc017e6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019eb289-90e7-7f7c-9b2b-477dfe36542d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_019eb289-90e7-7060-80c0-4fd9c23bab57" xlink:to="loc_us-gaap_DerivativeLineItems_019eb289-90e7-7f7c-9b2b-477dfe36542d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_019eb289-90e7-7740-87c2-7077224b0528" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_019eb289-90e7-7f7c-9b2b-477dfe36542d" xlink:to="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_019eb289-90e7-7740-87c2-7077224b0528" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NumberOfPartiesRequiredToPostCollateral_019eb289-90e7-7c42-9417-04119eba67eb" xlink:href="opc-20260630.xsd#opc_NumberOfPartiesRequiredToPostCollateral"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_019eb289-90e7-7f7c-9b2b-477dfe36542d" xlink:to="loc_opc_NumberOfPartiesRequiredToPostCollateral_019eb289-90e7-7c42-9417-04119eba67eb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019eb289-90e7-7f66-b75c-f284f7a8b837" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CollateralAlreadyPostedAggregateFairValue"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_019eb289-90e7-7f7c-9b2b-477dfe36542d" xlink:to="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019eb289-90e7-7f66-b75c-f284f7a8b837" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DerivativeInstrumentsScheduleofNotionalVolumeofNaturalGasDerivativesthatisExpectedtoSettleorMatureEachYearDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#DerivativeInstrumentsScheduleofNotionalVolumeofNaturalGasDerivativesthatisExpectedtoSettleorMatureEachYearDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DerivativeInstrumentsScheduleofNotionalVolumeofNaturalGasDerivativesthatisExpectedtoSettleorMatureEachYearDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-78c5-b6cf-da1c575d062d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019eb289-90e7-74f4-a16d-d438eb3ccbba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-78c5-b6cf-da1c575d062d" xlink:to="loc_us-gaap_DerivativeTable_019eb289-90e7-74f4-a16d-d438eb3ccbba" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-733f-8758-1508fa4147a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_019eb289-90e7-74f4-a16d-d438eb3ccbba" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-733f-8758-1508fa4147a3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7b36-96eb-f60b9eeb8195" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-733f-8758-1508fa4147a3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7b36-96eb-f60b9eeb8195" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019eb289-90e7-7f8f-a546-c6546d610d71" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityContractMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7b36-96eb-f60b9eeb8195" xlink:to="loc_us-gaap_CommodityContractMember_019eb289-90e7-7f8f-a546-c6546d610d71" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DerivativeSettlementOrMaturityByPeriodAxis_019eb289-90e7-7b91-8abd-7fc510b8a991" xlink:href="opc-20260630.xsd#opc_DerivativeSettlementOrMaturityByPeriodAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_019eb289-90e7-74f4-a16d-d438eb3ccbba" xlink:to="loc_opc_DerivativeSettlementOrMaturityByPeriodAxis_019eb289-90e7-7b91-8abd-7fc510b8a991" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DerivativeSettlementOrMaturityByPeriodDomain_019eb289-90e7-7dcc-8c63-2253e6ec3604" xlink:href="opc-20260630.xsd#opc_DerivativeSettlementOrMaturityByPeriodDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DerivativeSettlementOrMaturityByPeriodAxis_019eb289-90e7-7b91-8abd-7fc510b8a991" xlink:to="loc_opc_DerivativeSettlementOrMaturityByPeriodDomain_019eb289-90e7-7dcc-8c63-2253e6ec3604" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_SettlementOrMaturityPeriodRemainderOfCurrentFiscalYearMember_019eb289-90e7-73b4-b4f0-e1b158c634f4" xlink:href="opc-20260630.xsd#opc_SettlementOrMaturityPeriodRemainderOfCurrentFiscalYearMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DerivativeSettlementOrMaturityByPeriodDomain_019eb289-90e7-7dcc-8c63-2253e6ec3604" xlink:to="loc_opc_SettlementOrMaturityPeriodRemainderOfCurrentFiscalYearMember_019eb289-90e7-73b4-b4f0-e1b158c634f4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_SettlementOrMaturityPeriodYearOneMember_019eb289-90e7-7111-a7dd-0d13f27355fa" xlink:href="opc-20260630.xsd#opc_SettlementOrMaturityPeriodYearOneMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DerivativeSettlementOrMaturityByPeriodDomain_019eb289-90e7-7dcc-8c63-2253e6ec3604" xlink:to="loc_opc_SettlementOrMaturityPeriodYearOneMember_019eb289-90e7-7111-a7dd-0d13f27355fa" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_SettlementOrMaturityPeriodYearTwoMember_019eb289-90e7-7676-9f97-8cfd633413b5" xlink:href="opc-20260630.xsd#opc_SettlementOrMaturityPeriodYearTwoMember"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DerivativeSettlementOrMaturityByPeriodDomain_019eb289-90e7-7dcc-8c63-2253e6ec3604" xlink:to="loc_opc_SettlementOrMaturityPeriodYearTwoMember_019eb289-90e7-7676-9f97-8cfd633413b5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_SettlementOrMaturityPeriodYearThreeMember_019eb289-90e7-7621-93d3-e5a6a9850f6a" xlink:href="opc-20260630.xsd#opc_SettlementOrMaturityPeriodYearThreeMember"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DerivativeSettlementOrMaturityByPeriodDomain_019eb289-90e7-7dcc-8c63-2253e6ec3604" xlink:to="loc_opc_SettlementOrMaturityPeriodYearThreeMember_019eb289-90e7-7621-93d3-e5a6a9850f6a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_SettlementOrMaturityPeriodYearFourMember_019eb289-90e7-784c-989b-4516637388b3" xlink:href="opc-20260630.xsd#opc_SettlementOrMaturityPeriodYearFourMember"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DerivativeSettlementOrMaturityByPeriodDomain_019eb289-90e7-7dcc-8c63-2253e6ec3604" xlink:to="loc_opc_SettlementOrMaturityPeriodYearFourMember_019eb289-90e7-784c-989b-4516637388b3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_SettlementOrMaturityPeriodYearFiveMember_019eb289-90e7-7970-9662-b76ac1bfdbbc" xlink:href="opc-20260630.xsd#opc_SettlementOrMaturityPeriodYearFiveMember"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DerivativeSettlementOrMaturityByPeriodDomain_019eb289-90e7-7dcc-8c63-2253e6ec3604" xlink:to="loc_opc_SettlementOrMaturityPeriodYearFiveMember_019eb289-90e7-7970-9662-b76ac1bfdbbc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019eb289-90e7-7a7f-8786-983acb2728ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_019eb289-90e7-74f4-a16d-d438eb3ccbba" xlink:to="loc_us-gaap_DerivativeLineItems_019eb289-90e7-7a7f-8786-983acb2728ef" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_019eb289-90e7-7e42-ad92-064377947be2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_019eb289-90e7-7a7f-8786-983acb2728ef" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_019eb289-90e7-7e42-ad92-064377947be2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DerivativeInstrumentsScheduleofFairValueofDerivativeInstrumentsNotDesignatedasHedgingDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#DerivativeInstrumentsScheduleofFairValueofDerivativeInstrumentsNotDesignatedasHedgingDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DerivativeInstrumentsScheduleofFairValueofDerivativeInstrumentsNotDesignatedasHedgingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7c10-8541-b4111316a671" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019eb289-90e7-7fea-b50b-1fb420544b72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7c10-8541-b4111316a671" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019eb289-90e7-7fea-b50b-1fb420544b72" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-7d3f-b998-21d82ad92ac3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019eb289-90e7-7fea-b50b-1fb420544b72" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-7d3f-b998-21d82ad92ac3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7be1-a20e-b021493e64f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-7d3f-b998-21d82ad92ac3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7be1-a20e-b021493e64f8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019eb289-90e7-71c5-bba7-c9a04665a4f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityContractMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7be1-a20e-b021493e64f8" xlink:to="loc_us-gaap_CommodityContractMember_019eb289-90e7-71c5-bba7-c9a04665a4f0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019eb289-90e7-7578-afc7-ea44b9e681dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019eb289-90e7-7fea-b50b-1fb420544b72" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019eb289-90e7-7578-afc7-ea44b9e681dc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019eb289-90e7-7b3e-a033-0d5bd37c1c4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019eb289-90e7-7fea-b50b-1fb420544b72" xlink:to="loc_us-gaap_DerivativesFairValueLineItems_019eb289-90e7-7b3e-a033-0d5bd37c1c4b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueNetAbstract_019eb289-90e7-7180-a8e7-be751c2b0e9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueNetAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019eb289-90e7-7b3e-a033-0d5bd37c1c4b" xlink:to="loc_us-gaap_DerivativeAssetFairValueNetAbstract_019eb289-90e7-7180-a8e7-be751c2b0e9c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019eb289-90e7-7126-9953-224b5dedfc89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeAssetFairValueNetAbstract_019eb289-90e7-7180-a8e7-be751c2b0e9c" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019eb289-90e7-7126-9953-224b5dedfc89" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019eb289-90e7-71df-a86b-1cebf44baa8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueGrossLiability"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeAssetFairValueNetAbstract_019eb289-90e7-7180-a8e7-be751c2b0e9c" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019eb289-90e7-71df-a86b-1cebf44baa8d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019eb289-90e7-777f-a842-530806c254e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeAssetFairValueNetAbstract_019eb289-90e7-7180-a8e7-be751c2b0e9c" xlink:to="loc_us-gaap_DerivativeAssets_019eb289-90e7-777f-a842-530806c254e0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueNetAbstract_019eb289-90e7-751b-8bd0-5545c7eefdcb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueNetAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019eb289-90e7-7b3e-a033-0d5bd37c1c4b" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueNetAbstract_019eb289-90e7-751b-8bd0-5545c7eefdcb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019eb289-90e7-7c5b-9996-eb13137d661e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueGrossAsset"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLiabilityFairValueNetAbstract_019eb289-90e7-751b-8bd0-5545c7eefdcb" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019eb289-90e7-7c5b-9996-eb13137d661e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019eb289-90e7-741d-9ee0-d2082a5b695f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLiabilityFairValueNetAbstract_019eb289-90e7-751b-8bd0-5545c7eefdcb" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019eb289-90e7-741d-9ee0-d2082a5b695f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019eb289-90e7-77ff-a6b1-9fb8f2d6607a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLiabilityFairValueNetAbstract_019eb289-90e7-751b-8bd0-5545c7eefdcb" xlink:to="loc_us-gaap_DerivativeLiabilities_019eb289-90e7-77ff-a6b1-9fb8f2d6607a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DerivativeSubjectToMasterNettingArrangementOffsetNet_019eb289-90e7-7cd2-afde-6452b5fd2d0c" xlink:href="opc-20260630.xsd#opc_DerivativeSubjectToMasterNettingArrangementOffsetNet"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019eb289-90e7-7b3e-a033-0d5bd37c1c4b" xlink:to="loc_opc_DerivativeSubjectToMasterNettingArrangementOffsetNet_019eb289-90e7-7cd2-afde-6452b5fd2d0c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DerivativeSubjectToMasterNettingArrangementBeforeOffsetNet_019eb289-90e7-79aa-b8a4-36451444b3ff" xlink:href="opc-20260630.xsd#opc_DerivativeSubjectToMasterNettingArrangementBeforeOffsetNet"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019eb289-90e7-7b3e-a033-0d5bd37c1c4b" xlink:to="loc_opc_DerivativeSubjectToMasterNettingArrangementBeforeOffsetNet_019eb289-90e7-79aa-b8a4-36451444b3ff" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_019eb289-90e7-7442-9725-66795f317fc4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019eb289-90e7-7b3e-a033-0d5bd37c1c4b" xlink:to="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_019eb289-90e7-7442-9725-66795f317fc4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DerivativeInstrumentsScheduleofRealizedandUnrealizedGainsLossesonDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#DerivativeInstrumentsScheduleofRealizedandUnrealizedGainsLossesonDerivativeInstrumentsDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DerivativeInstrumentsScheduleofRealizedandUnrealizedGainsLossesonDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7f7d-885b-5fcbdbcfdced" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019eb289-90e7-7622-b4ae-f964b55066a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019eb289-90e7-7f7d-885b-5fcbdbcfdced" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019eb289-90e7-7622-b4ae-f964b55066a5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-7133-8029-d40466a82c25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019eb289-90e7-7622-b4ae-f964b55066a5" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-7133-8029-d40466a82c25" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7a8c-bd33-0eb61517cd2e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019eb289-90e7-7133-8029-d40466a82c25" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7a8c-bd33-0eb61517cd2e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019eb289-90e7-7723-9240-4a9d9a421ba0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityContractMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019eb289-90e7-7a8c-bd33-0eb61517cd2e" xlink:to="loc_us-gaap_CommodityContractMember_019eb289-90e7-7723-9240-4a9d9a421ba0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019eb289-90e7-7505-bf56-61b9fd6e984d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019eb289-90e7-7622-b4ae-f964b55066a5" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019eb289-90e7-7505-bf56-61b9fd6e984d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_019eb289-90e7-7b89-b55b-88dc3f1deace" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNetAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019eb289-90e7-7505-bf56-61b9fd6e984d" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_019eb289-90e7-7b89-b55b-88dc3f1deace" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainOnDerivative_019eb289-90e7-7b17-aad4-676c42eff12c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainOnDerivative"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_019eb289-90e7-7b89-b55b-88dc3f1deace" xlink:to="loc_us-gaap_DerivativeGainOnDerivative_019eb289-90e7-7b17-aad4-676c42eff12c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLossOnDerivative_019eb289-90e7-796e-bbb6-507ddfc661c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLossOnDerivative"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_019eb289-90e7-7b89-b55b-88dc3f1deace" xlink:to="loc_us-gaap_DerivativeLossOnDerivative_019eb289-90e7-796e-bbb6-507ddfc661c0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019eb289-90e7-70da-9ceb-2882a8f551b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_019eb289-90e7-7b89-b55b-88dc3f1deace" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019eb289-90e7-70da-9ceb-2882a8f551b9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_019eb289-90e7-754b-aea4-c0f856030b51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrealizedGainLossOnDerivatives"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_019eb289-90e7-7b89-b55b-88dc3f1deace" xlink:to="loc_us-gaap_UnrealizedGainLossOnDerivatives_019eb289-90e7-754b-aea4-c0f856030b51" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/InvestmentSecuritiesScheduleofDebtandEquitySecuritiesDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#InvestmentSecuritiesScheduleofDebtandEquitySecuritiesDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/InvestmentSecuritiesScheduleofDebtandEquitySecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-7cec-b2ed-4981e81a82c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019eb289-90e7-776b-8d2c-4377d9f46231" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-7cec-b2ed-4981e81a82c0" xlink:to="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019eb289-90e7-776b-8d2c-4377d9f46231" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCost_019eb289-90e7-7250-99a3-98761ad8c1a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiCost"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019eb289-90e7-776b-8d2c-4377d9f46231" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCost_019eb289-90e7-7250-99a3-98761ad8c1a6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebtAmortizedCost_019eb289-90e7-77bb-879b-a76bb92484c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecuritiesDebtAmortizedCost"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019eb289-90e7-776b-8d2c-4377d9f46231" xlink:to="loc_us-gaap_TradingSecuritiesDebtAmortizedCost_019eb289-90e7-77bb-879b-a76bb92484c7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OtherSecuritiesFvNiCost_019eb289-90e7-7f60-8e67-1502ca089396" xlink:href="opc-20260630.xsd#opc_OtherSecuritiesFvNiCost"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019eb289-90e7-776b-8d2c-4377d9f46231" xlink:to="loc_opc_OtherSecuritiesFvNiCost_019eb289-90e7-7f60-8e67-1502ca089396" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCost_019eb289-90e7-76b0-b808-4fc768e8c08c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCost"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019eb289-90e7-776b-8d2c-4377d9f46231" xlink:to="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCost_019eb289-90e7-76b0-b808-4fc768e8c08c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DebtAndEquitySecuritiesUnrealizedGainAbstract_019eb289-90e7-7cb3-84a8-5cc383d878fd" xlink:href="opc-20260630.xsd#opc_DebtAndEquitySecuritiesUnrealizedGainAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-7cec-b2ed-4981e81a82c0" xlink:to="loc_opc_DebtAndEquitySecuritiesUnrealizedGainAbstract_019eb289-90e7-7cb3-84a8-5cc383d878fd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGain_019eb289-90e7-7940-b6c8-1b3e33ff6050" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DebtAndEquitySecuritiesUnrealizedGainAbstract_019eb289-90e7-7cb3-84a8-5cc383d878fd" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGain_019eb289-90e7-7940-b6c8-1b3e33ff6050" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingUnrealizedGain_019eb289-90e7-76e8-9bc2-a73efea321a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingUnrealizedGain"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DebtAndEquitySecuritiesUnrealizedGainAbstract_019eb289-90e7-7cb3-84a8-5cc383d878fd" xlink:to="loc_us-gaap_DebtSecuritiesTradingUnrealizedGain_019eb289-90e7-76e8-9bc2-a73efea321a7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OtherSecuritiesFvNiUnrealizedGain_019eb289-90e7-773d-b263-8d270b57bc77" xlink:href="opc-20260630.xsd#opc_OtherSecuritiesFvNiUnrealizedGain"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DebtAndEquitySecuritiesUnrealizedGainAbstract_019eb289-90e7-7cb3-84a8-5cc383d878fd" xlink:to="loc_opc_OtherSecuritiesFvNiUnrealizedGain_019eb289-90e7-773d-b263-8d270b57bc77" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DebtSecuritiesTradingAndEquitySecuritiesUnrealizedGain_019eb289-90e7-7ca0-a57a-1f189b507d1c" xlink:href="opc-20260630.xsd#opc_DebtSecuritiesTradingAndEquitySecuritiesUnrealizedGain"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DebtAndEquitySecuritiesUnrealizedGainAbstract_019eb289-90e7-7cb3-84a8-5cc383d878fd" xlink:to="loc_opc_DebtSecuritiesTradingAndEquitySecuritiesUnrealizedGain_019eb289-90e7-7ca0-a57a-1f189b507d1c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DebtAndEquitySecuritiesUnrealizedLossAbstract_019eb289-90e7-7d0e-844e-e905bbdca070" xlink:href="opc-20260630.xsd#opc_DebtAndEquitySecuritiesUnrealizedLossAbstract"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-7cec-b2ed-4981e81a82c0" xlink:to="loc_opc_DebtAndEquitySecuritiesUnrealizedLossAbstract_019eb289-90e7-7d0e-844e-e905bbdca070" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedLoss_019eb289-90e7-7df4-8db2-9ac080d3ec12" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedLoss"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DebtAndEquitySecuritiesUnrealizedLossAbstract_019eb289-90e7-7d0e-844e-e905bbdca070" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedLoss_019eb289-90e7-7df4-8db2-9ac080d3ec12" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingUnrealizedLoss_019eb289-90e7-7225-bf40-4ee4b65050f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingUnrealizedLoss"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DebtAndEquitySecuritiesUnrealizedLossAbstract_019eb289-90e7-7d0e-844e-e905bbdca070" xlink:to="loc_us-gaap_DebtSecuritiesTradingUnrealizedLoss_019eb289-90e7-7225-bf40-4ee4b65050f7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OtherSecuritiesFVNIUnrealizedLoss_019eb289-90e7-7aa2-a2e6-fb17dd4fd32f" xlink:href="opc-20260630.xsd#opc_OtherSecuritiesFVNIUnrealizedLoss"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DebtAndEquitySecuritiesUnrealizedLossAbstract_019eb289-90e7-7d0e-844e-e905bbdca070" xlink:to="loc_opc_OtherSecuritiesFVNIUnrealizedLoss_019eb289-90e7-7aa2-a2e6-fb17dd4fd32f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DebtSecuritiesTradingAndEquitySecuritiesUnrealizedLoss_019eb289-90e7-7594-89c5-fb4a6b35cb46" xlink:href="opc-20260630.xsd#opc_DebtSecuritiesTradingAndEquitySecuritiesUnrealizedLoss"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DebtAndEquitySecuritiesUnrealizedLossAbstract_019eb289-90e7-7d0e-844e-e905bbdca070" xlink:to="loc_opc_DebtSecuritiesTradingAndEquitySecuritiesUnrealizedLoss_019eb289-90e7-7594-89c5-fb4a6b35cb46" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019eb289-90e7-7b4f-b448-8d288ec32c4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-7cec-b2ed-4981e81a82c0" xlink:to="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019eb289-90e7-7b4f-b448-8d288ec32c4c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019eb289-90e7-7921-bdcd-fee9da924b8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019eb289-90e7-7b4f-b448-8d288ec32c4c" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019eb289-90e7-7921-bdcd-fee9da924b8c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebt_019eb289-90e7-703a-84ae-f6a41cd5dc67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecuritiesDebt"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019eb289-90e7-7b4f-b448-8d288ec32c4c" xlink:to="loc_us-gaap_TradingSecuritiesDebt_019eb289-90e7-703a-84ae-f6a41cd5dc67" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OtherSecuritiesFvNi_019eb289-90e7-7ac0-8e4b-304d48fa82b5" xlink:href="opc-20260630.xsd#opc_OtherSecuritiesFvNi"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019eb289-90e7-7b4f-b448-8d288ec32c4c" xlink:to="loc_opc_OtherSecuritiesFvNi_019eb289-90e7-7ac0-8e4b-304d48fa82b5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecurities_019eb289-90e7-768e-bbf6-525bc97ead72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecurities"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019eb289-90e7-7b4f-b448-8d288ec32c4c" xlink:to="loc_us-gaap_TradingSecurities_019eb289-90e7-768e-bbf6-525bc97ead72" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/InvestmentSecuritiesNarrativeDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#InvestmentSecuritiesNarrativeDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/InvestmentSecuritiesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-767a-ae2d-f2373dfdad95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DebtSecuritiesAvailableForSaleAmortizedCostUnrealizedLossPositions_019eb289-90e7-786c-9875-9a9c977e70cf" xlink:href="opc-20260630.xsd#opc_DebtSecuritiesAvailableForSaleAmortizedCostUnrealizedLossPositions"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-767a-ae2d-f2373dfdad95" xlink:to="loc_opc_DebtSecuritiesAvailableForSaleAmortizedCostUnrealizedLossPositions_019eb289-90e7-786c-9875-9a9c977e70cf" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019eb289-90e7-7606-a022-9fe394e78a00" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-767a-ae2d-f2373dfdad95" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019eb289-90e7-7606-a022-9fe394e78a00" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019eb289-90e7-7c9b-bd7d-58b132b5ef7d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-767a-ae2d-f2373dfdad95" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019eb289-90e7-7c9b-bd7d-58b132b5ef7d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019eb289-90e7-7bc7-a691-7c396a0def0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_019eb289-90e7-767a-ae2d-f2373dfdad95" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019eb289-90e7-7bc7-a691-7c396a0def0d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RevenueRecognitionNarrativeDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#RevenueRecognitionNarrativeDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RevenueRecognitionNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_019eb289-90e7-700a-83fb-e53e24c9f93b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7a87-9411-afc3cbfe7864" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_019eb289-90e7-700a-83fb-e53e24c9f93b" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7a87-9411-afc3cbfe7864" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019eb289-90e7-7d28-a034-d7f678b7858f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementScenarioAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7a87-9411-afc3cbfe7864" xlink:to="loc_srt_StatementScenarioAxis_019eb289-90e7-7d28-a034-d7f678b7858f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019eb289-90e7-7efb-a646-a6d357737ffc" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_StatementScenarioAxis_019eb289-90e7-7d28-a034-d7f678b7858f" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019eb289-90e7-7efb-a646-a6d357737ffc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_019eb289-90e7-7c1b-83da-e47566afb299" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioForecastMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019eb289-90e7-7efb-a646-a6d357737ffc" xlink:to="loc_srt_ScenarioForecastMember_019eb289-90e7-7c1b-83da-e47566afb299" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019eb289-90e7-79b9-b507-a949772fa12f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7a87-9411-afc3cbfe7864" xlink:to="loc_srt_MajorCustomersAxis_019eb289-90e7-79b9-b507-a949772fa12f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019eb289-90e7-7bca-9eec-8256ddf8d896" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_MajorCustomersAxis_019eb289-90e7-79b9-b507-a949772fa12f" xlink:to="loc_srt_NameOfMajorCustomerDomain_019eb289-90e7-7bca-9eec-8256ddf8d896" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_CooperativeMembersMember_019eb289-90e7-7cbc-9c76-02573f7d3540" xlink:href="opc-20260630.xsd#opc_CooperativeMembersMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_NameOfMajorCustomerDomain_019eb289-90e7-7bca-9eec-8256ddf8d896" xlink:to="loc_opc_CooperativeMembersMember_019eb289-90e7-7cbc-9c76-02573f7d3540" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NonMembersMember_019eb289-90e7-7e29-bd6d-1255bf9ab93c" xlink:href="opc-20260630.xsd#opc_NonMembersMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_NameOfMajorCustomerDomain_019eb289-90e7-7bca-9eec-8256ddf8d896" xlink:to="loc_opc_NonMembersMember_019eb289-90e7-7e29-bd6d-1255bf9ab93c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019eb289-90e7-7c7f-93bc-cf306d76b664" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7a87-9411-afc3cbfe7864" xlink:to="loc_srt_ProductOrServiceAxis_019eb289-90e7-7c7f-93bc-cf306d76b664" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019eb289-90e7-7833-a295-05a953c9101d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductOrServiceAxis_019eb289-90e7-7c7f-93bc-cf306d76b664" xlink:to="loc_srt_ProductsAndServicesDomain_019eb289-90e7-7833-a295-05a953c9101d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_SaleOfBobbyCSmithJrDeferringMembersOutputMember_019eb289-90e7-74a3-8b3d-ed8ebbe4cba5" xlink:href="opc-20260630.xsd#opc_SaleOfBobbyCSmithJrDeferringMembersOutputMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductsAndServicesDomain_019eb289-90e7-7833-a295-05a953c9101d" xlink:to="loc_opc_SaleOfBobbyCSmithJrDeferringMembersOutputMember_019eb289-90e7-74a3-8b3d-ed8ebbe4cba5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019eb289-90e7-7d9f-8d90-ff6c825f6b08" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7a87-9411-afc3cbfe7864" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019eb289-90e7-7d9f-8d90-ff6c825f6b08" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019eb289-90e7-7487-9fd6-66ebc49d7f79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019eb289-90e7-7d9f-8d90-ff6c825f6b08" xlink:to="loc_us-gaap_ReceivableTypeDomain_019eb289-90e7-7487-9fd6-66ebc49d7f79" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ReceivableFromU.S.GovernmentNuclearProductionTaxCreditMember_019eb289-90e7-7061-86e7-88dc071bcc27" xlink:href="opc-20260630.xsd#opc_ReceivableFromU.S.GovernmentNuclearProductionTaxCreditMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReceivableTypeDomain_019eb289-90e7-7487-9fd6-66ebc49d7f79" xlink:to="loc_opc_ReceivableFromU.S.GovernmentNuclearProductionTaxCreditMember_019eb289-90e7-7061-86e7-88dc071bcc27" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-74fe-933b-733655175334" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilityAxis"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7a87-9411-afc3cbfe7864" xlink:to="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-74fe-933b-733655175334" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-75fb-9aeb-02cc36cc9c2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilityPlantDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-74fe-933b-733655175334" xlink:to="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-75fb-9aeb-02cc36cc9c2d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_VogtleNewUnitsMember_019eb289-90e7-7895-8f78-755de3429c96" xlink:href="opc-20260630.xsd#opc_VogtleNewUnitsMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-75fb-9aeb-02cc36cc9c2d" xlink:to="loc_opc_VogtleNewUnitsMember_019eb289-90e7-7895-8f78-755de3429c96" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_SmarrCombinedCycleProjectMember_019eb289-90e7-7459-8afc-69b21b4a453d" xlink:href="opc-20260630.xsd#opc_SmarrCombinedCycleProjectMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-75fb-9aeb-02cc36cc9c2d" xlink:to="loc_opc_SmarrCombinedCycleProjectMember_019eb289-90e7-7459-8afc-69b21b4a453d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7a87-9411-afc3cbfe7864" xlink:to="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NumberOfElectricDistributionCooperativeMembers_019eb289-90e7-77fe-b623-950f3d3a2297" xlink:href="opc-20260630.xsd#opc_NumberOfElectricDistributionCooperativeMembers"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_opc_NumberOfElectricDistributionCooperativeMembers_019eb289-90e7-77fe-b623-950f3d3a2297" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NumberOfServicesProvided_019eb289-90e7-7ceb-90a2-e5aa25f4cfc6" xlink:href="opc-20260630.xsd#opc_NumberOfServicesProvided"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_opc_NumberOfServicesProvided_019eb289-90e7-7ceb-90a2-e5aa25f4cfc6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_MarginsForInterestRatio_019eb289-90e7-71df-8ffd-f3c87ffb0e77" xlink:href="opc-20260630.xsd#opc_MarginsForInterestRatio"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_opc_MarginsForInterestRatio_019eb289-90e7-71df-8ffd-f3c87ffb0e77" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_MinimumMarginsToInterestRatio_019eb289-90e7-7aa3-baaf-323b1ca89a16" xlink:href="opc-20260630.xsd#opc_MinimumMarginsToInterestRatio"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_opc_MinimumMarginsToInterestRatio_019eb289-90e7-7aa3-baaf-323b1ca89a16" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerRefundLiability_019eb289-90e7-74b9-8bee-05378d5496f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerRefundLiability"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_us-gaap_ContractWithCustomerRefundLiability_019eb289-90e7-74b9-8bee-05378d5496f3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetGross_019eb289-90e7-7dae-afdc-cc1657471bce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetGross"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_us-gaap_ContractWithCustomerAssetGross_019eb289-90e7-7dae-afdc-cc1657471bce" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetGrossCurrent_019eb289-90e7-71f3-bac5-89bd25e672ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetGrossCurrent"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_us-gaap_ContractWithCustomerAssetGrossCurrent_019eb289-90e7-71f3-bac5-89bd25e672ea" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetGrossNoncurrent_019eb289-90e7-74c4-ba96-d9af48160829" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetGrossNoncurrent"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_us-gaap_ContractWithCustomerAssetGrossNoncurrent_019eb289-90e7-74c4-ba96-d9af48160829" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_RateManagementProgramAdditionalCollectionPeriod_019eb289-90e7-7d6f-a53c-31b50b214911" xlink:href="opc-20260630.xsd#opc_RateManagementProgramAdditionalCollectionPeriod"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_opc_RateManagementProgramAdditionalCollectionPeriod_019eb289-90e7-7d6f-a53c-31b50b214911" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_RateManagementProgramBillingPeriod_019eb289-90e7-7627-b469-2382c7dca829" xlink:href="opc-20260630.xsd#opc_RateManagementProgramBillingPeriod"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_opc_RateManagementProgramBillingPeriod_019eb289-90e7-7627-b469-2382c7dca829" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_RateManagementProgramBillingAmount_019eb289-90e7-799c-9de7-6d2260773397" xlink:href="opc-20260630.xsd#opc_RateManagementProgramBillingAmount"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_opc_RateManagementProgramBillingAmount_019eb289-90e7-799c-9de7-6d2260773397" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ElectricGenerationRevenueCumulativeAmountRecoveredFromMembers_019eb289-90e7-7dc8-ab41-d113d497ea6a" xlink:href="opc-20260630.xsd#opc_ElectricGenerationRevenueCumulativeAmountRecoveredFromMembers"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_opc_ElectricGenerationRevenueCumulativeAmountRecoveredFromMembers_019eb289-90e7-7dc8-ab41-d113d497ea6a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_RateManagementProgramAmountExpectedToBeCollected_019eb289-90e7-7530-bffd-877aa392c31a" xlink:href="opc-20260630.xsd#opc_RateManagementProgramAmountExpectedToBeCollected"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-7590-b160-98d8ec2b5eb6" xlink:to="loc_opc_RateManagementProgramAmountExpectedToBeCollected_019eb289-90e7-7530-bffd-877aa392c31a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RevenueRecognitionScheduleofSalestoMembersandSalestoNonMembersDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#RevenueRecognitionScheduleofSalestoMembersandSalestoNonMembersDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RevenueRecognitionScheduleofSalestoMembersandSalestoNonMembersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_019eb289-90e7-7bd3-bbcf-a95e4312552b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7fbd-9255-e633bd3a9a15" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_019eb289-90e7-7bd3-bbcf-a95e4312552b" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7fbd-9255-e633bd3a9a15" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019eb289-90e7-7856-9938-4e3f55d38790" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7fbd-9255-e633bd3a9a15" xlink:to="loc_srt_MajorCustomersAxis_019eb289-90e7-7856-9938-4e3f55d38790" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019eb289-90e7-7e04-9f65-22e8b15f0550" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_MajorCustomersAxis_019eb289-90e7-7856-9938-4e3f55d38790" xlink:to="loc_srt_NameOfMajorCustomerDomain_019eb289-90e7-7e04-9f65-22e8b15f0550" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_CooperativeMembersMember_019eb289-90e7-7af5-9697-cfd2af187882" xlink:href="opc-20260630.xsd#opc_CooperativeMembersMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_NameOfMajorCustomerDomain_019eb289-90e7-7e04-9f65-22e8b15f0550" xlink:to="loc_opc_CooperativeMembersMember_019eb289-90e7-7af5-9697-cfd2af187882" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NonMembersMember_019eb289-90e7-7a4c-ab03-f84d5147904c" xlink:href="opc-20260630.xsd#opc_NonMembersMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_NameOfMajorCustomerDomain_019eb289-90e7-7e04-9f65-22e8b15f0550" xlink:to="loc_opc_NonMembersMember_019eb289-90e7-7a4c-ab03-f84d5147904c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019eb289-90e7-79fc-84bf-b4a845e99b2d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7fbd-9255-e633bd3a9a15" xlink:to="loc_srt_ProductOrServiceAxis_019eb289-90e7-79fc-84bf-b4a845e99b2d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019eb289-90e7-78c4-a7e8-7ba35e2ed5bb" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductOrServiceAxis_019eb289-90e7-79fc-84bf-b4a845e99b2d" xlink:to="loc_srt_ProductsAndServicesDomain_019eb289-90e7-78c4-a7e8-7ba35e2ed5bb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_CapacityServicesMember_019eb289-90e7-75a0-bcbd-c0ec54df49f4" xlink:href="opc-20260630.xsd#opc_CapacityServicesMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductsAndServicesDomain_019eb289-90e7-78c4-a7e8-7ba35e2ed5bb" xlink:to="loc_opc_CapacityServicesMember_019eb289-90e7-75a0-bcbd-c0ec54df49f4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_EnergyServicesMember_019eb289-90e7-7af5-938f-503a25d62b67" xlink:href="opc-20260630.xsd#opc_EnergyServicesMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductsAndServicesDomain_019eb289-90e7-78c4-a7e8-7ba35e2ed5bb" xlink:to="loc_opc_EnergyServicesMember_019eb289-90e7-7af5-938f-503a25d62b67" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-72e3-91f3-3c3220a163c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eb289-90e7-7fbd-9255-e633bd3a9a15" xlink:to="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-72e3-91f3-3c3220a163c1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eb289-90e7-733f-8fb3-2f7f9f10578d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eb289-90e7-72e3-91f3-3c3220a163c1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eb289-90e7-733f-8fb3-2f7f9f10578d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#LeasesNarrativeDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/LeasesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAbstract_019eb289-90e7-7c1f-bf83-b9ca8fce95e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LeaseDisclosureTable_019eb289-90e7-7f24-ad89-cc722733b2e1" xlink:href="opc-20260630.xsd#opc_LeaseDisclosureTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7c1f-bf83-b9ca8fce95e2" xlink:to="loc_opc_LeaseDisclosureTable_019eb289-90e7-7f24-ad89-cc722733b2e1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-7b85-abba-05acea1040d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilityAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureTable_019eb289-90e7-7f24-ad89-cc722733b2e1" xlink:to="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-7b85-abba-05acea1040d3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-73b5-8d49-d2c2d82a5067" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilityPlantDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-7b85-abba-05acea1040d3" xlink:to="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-73b5-8d49-d2c2d82a5067" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_SchererUnitNumber2Member_019eb289-90e7-7f75-99e8-529c553151b5" xlink:href="opc-20260630.xsd#opc_SchererUnitNumber2Member"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-73b5-8d49-d2c2d82a5067" xlink:to="loc_opc_SchererUnitNumber2Member_019eb289-90e7-7f75-99e8-529c553151b5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LeaseArrangementsAxis_019eb289-90e7-71dc-95df-47e2ef49e6b0" xlink:href="opc-20260630.xsd#opc_LeaseArrangementsAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureTable_019eb289-90e7-7f24-ad89-cc722733b2e1" xlink:to="loc_opc_LeaseArrangementsAxis_019eb289-90e7-71dc-95df-47e2ef49e6b0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LeaseArrangementsDomain_019eb289-90e7-76c2-bc6a-81378d5c1a76" xlink:href="opc-20260630.xsd#opc_LeaseArrangementsDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseArrangementsAxis_019eb289-90e7-71dc-95df-47e2ef49e6b0" xlink:to="loc_opc_LeaseArrangementsDomain_019eb289-90e7-76c2-bc6a-81378d5c1a76" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_FinanceLeaseAgreementsWithTermsThroughDecember312027Member_019eb289-90e7-7630-b1f6-430e09deae6c" xlink:href="opc-20260630.xsd#opc_FinanceLeaseAgreementsWithTermsThroughDecember312027Member"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseArrangementsDomain_019eb289-90e7-76c2-bc6a-81378d5c1a76" xlink:to="loc_opc_FinanceLeaseAgreementsWithTermsThroughDecember312027Member_019eb289-90e7-7630-b1f6-430e09deae6c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_FinanceLeaseAgreementsWithTermsThroughJune302031Member_019eb289-90e7-758e-8f99-2fb93691813f" xlink:href="opc-20260630.xsd#opc_FinanceLeaseAgreementsWithTermsThroughJune302031Member"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseArrangementsDomain_019eb289-90e7-76c2-bc6a-81378d5c1a76" xlink:to="loc_opc_FinanceLeaseAgreementsWithTermsThroughJune302031Member_019eb289-90e7-758e-8f99-2fb93691813f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OperatingLeaseAgreementsWithTermsThroughFebruary2042Member_019eb289-90e7-70ed-b606-715765173fcb" xlink:href="opc-20260630.xsd#opc_OperatingLeaseAgreementsWithTermsThroughFebruary2042Member"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseArrangementsDomain_019eb289-90e7-76c2-bc6a-81378d5c1a76" xlink:to="loc_opc_OperatingLeaseAgreementsWithTermsThroughFebruary2042Member_019eb289-90e7-70ed-b606-715765173fcb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019eb289-90e7-7cfc-93ee-e1c88741c14d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureTable_019eb289-90e7-7f24-ad89-cc722733b2e1" xlink:to="loc_srt_RangeAxis_019eb289-90e7-7cfc-93ee-e1c88741c14d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eb289-90e7-7558-a4dc-c6798c36a064" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_RangeAxis_019eb289-90e7-7cfc-93ee-e1c88741c14d" xlink:to="loc_srt_RangeMember_019eb289-90e7-7558-a4dc-c6798c36a064" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019eb289-90e7-72b4-b5f0-dd49211eb857" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_RangeMember_019eb289-90e7-7558-a4dc-c6798c36a064" xlink:to="loc_srt_MinimumMember_019eb289-90e7-72b4-b5f0-dd49211eb857" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019eb289-90e7-768f-bdff-12a29b9b2644" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_RangeMember_019eb289-90e7-7558-a4dc-c6798c36a064" xlink:to="loc_srt_MaximumMember_019eb289-90e7-768f-bdff-12a29b9b2644" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_019eb289-90e7-76e0-9986-89605a02cd2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureTable_019eb289-90e7-7f24-ad89-cc722733b2e1" xlink:to="loc_us-gaap_LeaseContractualTermAxis_019eb289-90e7-76e0-9986-89605a02cd2f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_019eb289-90e7-775d-bdcc-5907d8bf5bcc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseContractualTermAxis_019eb289-90e7-76e0-9986-89605a02cd2f" xlink:to="loc_us-gaap_LeaseContractualTermDomain_019eb289-90e7-775d-bdcc-5907d8bf5bcc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OperatingLeaseAgreementsWithTermsThroughFebruary2042Member_019eb289-90e7-7be4-a4a2-b63cd677648a" xlink:href="opc-20260630.xsd#opc_OperatingLeaseAgreementsWithTermsThroughFebruary2042Member"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseContractualTermDomain_019eb289-90e7-775d-bdcc-5907d8bf5bcc" xlink:to="loc_opc_OperatingLeaseAgreementsWithTermsThroughFebruary2042Member_019eb289-90e7-7be4-a4a2-b63cd677648a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LeaseDisclosureLineItems_019eb289-90e7-726f-99d3-97f8107509da" xlink:href="opc-20260630.xsd#opc_LeaseDisclosureLineItems"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureTable_019eb289-90e7-7f24-ad89-cc722733b2e1" xlink:to="loc_opc_LeaseDisclosureLineItems_019eb289-90e7-726f-99d3-97f8107509da" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PercentageOfUndividedInterestPropertyPlantAndEquipment_019eb289-90e7-7277-9d6d-0048016ebd4d" xlink:href="opc-20260630.xsd#opc_PercentageOfUndividedInterestPropertyPlantAndEquipment"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureLineItems_019eb289-90e7-726f-99d3-97f8107509da" xlink:to="loc_opc_PercentageOfUndividedInterestPropertyPlantAndEquipment_019eb289-90e7-7277-9d6d-0048016ebd4d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NumberOfFinanceLeases_019eb289-90e7-7b62-8ad8-4fb0b9bf8ea6" xlink:href="opc-20260630.xsd#opc_NumberOfFinanceLeases"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureLineItems_019eb289-90e7-726f-99d3-97f8107509da" xlink:to="loc_opc_NumberOfFinanceLeases_019eb289-90e7-7b62-8ad8-4fb0b9bf8ea6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeFinanceLeaseRenewalTerm1_019eb289-90e7-788b-bb2f-fc727b4780f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeFinanceLeaseRenewalTerm1"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureLineItems_019eb289-90e7-726f-99d3-97f8107509da" xlink:to="loc_us-gaap_LesseeFinanceLeaseRenewalTerm1_019eb289-90e7-788b-bb2f-fc727b4780f6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NumberOfOperatingLeases_019eb289-90e7-7722-b723-74ffcf6944e7" xlink:href="opc-20260630.xsd#opc_NumberOfOperatingLeases"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureLineItems_019eb289-90e7-726f-99d3-97f8107509da" xlink:to="loc_opc_NumberOfOperatingLeases_019eb289-90e7-7722-b723-74ffcf6944e7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeOperatingLeaseNumberOfRenewalOptions_019eb289-90e7-7b04-ac62-4176202d3e5c" xlink:href="opc-20260630.xsd#opc_LesseeOperatingLeaseNumberOfRenewalOptions"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureLineItems_019eb289-90e7-726f-99d3-97f8107509da" xlink:to="loc_opc_LesseeOperatingLeaseNumberOfRenewalOptions_019eb289-90e7-7b04-ac62-4176202d3e5c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_019eb289-90e7-7f85-bf43-ad3660a3ba47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LeaseDisclosureLineItems_019eb289-90e7-726f-99d3-97f8107509da" xlink:to="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_019eb289-90e7-7f85-bf43-ad3660a3ba47" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/LeasesScheduleofLeaseandNonleaseComponentsforallLeaseAgreementsDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#LeasesScheduleofLeaseandNonleaseComponentsforallLeaseAgreementsDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/LeasesScheduleofLeaseandNonleaseComponentsforallLeaseAgreementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAbstract_019eb289-90e7-7b05-a086-d67a801a4a39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_FinanceLeasesAbstract_019eb289-90e7-79b6-987b-44497b108615" xlink:href="opc-20260630.xsd#opc_FinanceLeasesAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7b05-a086-d67a801a4a39" xlink:to="loc_opc_FinanceLeasesAbstract_019eb289-90e7-79b6-987b-44497b108615" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_FinanceLeaseRightOfUseAssetAbstract_019eb289-90e7-70a0-b9fa-cba4e50eb9d6" xlink:href="opc-20260630.xsd#opc_FinanceLeaseRightOfUseAssetAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_FinanceLeasesAbstract_019eb289-90e7-79b6-987b-44497b108615" xlink:to="loc_opc_FinanceLeaseRightOfUseAssetAbstract_019eb289-90e7-70a0-b9fa-cba4e50eb9d6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_019eb289-90e7-750b-bb7d-a038cb90d34e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_FinanceLeaseRightOfUseAssetAbstract_019eb289-90e7-70a0-b9fa-cba4e50eb9d6" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_019eb289-90e7-750b-bb7d-a038cb90d34e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization_019eb289-90e7-7596-958c-546f2b98e719" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_FinanceLeaseRightOfUseAssetAbstract_019eb289-90e7-70a0-b9fa-cba4e50eb9d6" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization_019eb289-90e7-7596-958c-546f2b98e719" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_019eb289-90e7-70d0-8237-68bcec6fbb27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAsset"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_FinanceLeaseRightOfUseAssetAbstract_019eb289-90e7-70a0-b9fa-cba4e50eb9d6" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_019eb289-90e7-70d0-8237-68bcec6fbb27" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityAbstract_019eb289-90e7-7064-876d-6d91d87b0102" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_FinanceLeasesAbstract_019eb289-90e7-79b6-987b-44497b108615" xlink:to="loc_us-gaap_FinanceLeaseLiabilityAbstract_019eb289-90e7-7064-876d-6d91d87b0102" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019eb289-90e7-73a6-95cf-632e17fdbf65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilityAbstract_019eb289-90e7-7064-876d-6d91d87b0102" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019eb289-90e7-73a6-95cf-632e17fdbf65" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_019eb289-90e7-7b3c-96bc-988ff7b7b3af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilityAbstract_019eb289-90e7-7064-876d-6d91d87b0102" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_019eb289-90e7-7b3c-96bc-988ff7b7b3af" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_019eb289-90e7-7401-9b7f-83f46f944c82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilityAbstract_019eb289-90e7-7064-876d-6d91d87b0102" xlink:to="loc_us-gaap_FinanceLeaseLiability_019eb289-90e7-7401-9b7f-83f46f944c82" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_019eb289-90e7-7ec9-bc59-97748165e752" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_FinanceLeasesAbstract_019eb289-90e7-79b6-987b-44497b108615" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_019eb289-90e7-7ec9-bc59-97748165e752" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OperatingLeasesAbstract_019eb289-90e7-7f04-9778-13418ad2d9b6" xlink:href="opc-20260630.xsd#opc_OperatingLeasesAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7b05-a086-d67a801a4a39" xlink:to="loc_opc_OperatingLeasesAbstract_019eb289-90e7-7f04-9778-13418ad2d9b6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OperatingLeaseRightOfUseAssetAbstract_019eb289-90e7-7080-adee-444cf4405e1d" xlink:href="opc-20260630.xsd#opc_OperatingLeaseRightOfUseAssetAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_OperatingLeasesAbstract_019eb289-90e7-7f04-9778-13418ad2d9b6" xlink:to="loc_opc_OperatingLeaseRightOfUseAssetAbstract_019eb289-90e7-7080-adee-444cf4405e1d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OperatingLeaseRightOfUseAssetNoncurrent_019eb289-90e7-7766-9d38-fecdcfef30cd" xlink:href="opc-20260630.xsd#opc_OperatingLeaseRightOfUseAssetNoncurrent"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_OperatingLeaseRightOfUseAssetAbstract_019eb289-90e7-7080-adee-444cf4405e1d" xlink:to="loc_opc_OperatingLeaseRightOfUseAssetNoncurrent_019eb289-90e7-7766-9d38-fecdcfef30cd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019eb289-90e7-7eb5-bc21-d16f1dc84aae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_OperatingLeaseRightOfUseAssetAbstract_019eb289-90e7-7080-adee-444cf4405e1d" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019eb289-90e7-7eb5-bc21-d16f1dc84aae" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_019eb289-90e7-709e-96a8-ae629cf1cd68" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_OperatingLeasesAbstract_019eb289-90e7-7f04-9778-13418ad2d9b6" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_019eb289-90e7-709e-96a8-ae629cf1cd68" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityAbstract_019eb289-90e7-7d78-aa76-4f693a41e050" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityAbstract"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_OperatingLeasesAbstract_019eb289-90e7-7f04-9778-13418ad2d9b6" xlink:to="loc_us-gaap_OperatingLeaseLiabilityAbstract_019eb289-90e7-7d78-aa76-4f693a41e050" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019eb289-90e7-7ce7-85a6-deee7bf58815" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilityAbstract_019eb289-90e7-7d78-aa76-4f693a41e050" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019eb289-90e7-7ce7-85a6-deee7bf58815" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019eb289-90e7-79a2-8fb8-6b867dd9936d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilityAbstract_019eb289-90e7-7d78-aa76-4f693a41e050" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019eb289-90e7-79a2-8fb8-6b867dd9936d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019eb289-90e7-745e-a27e-d6e00083947c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_OperatingLeasesAbstract_019eb289-90e7-7f04-9778-13418ad2d9b6" xlink:to="loc_us-gaap_OperatingLeaseLiability_019eb289-90e7-745e-a27e-d6e00083947c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_019eb289-90e7-70fb-a0cf-0bebf83bbaef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_OperatingLeasesAbstract_019eb289-90e7-7f04-9778-13418ad2d9b6" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_019eb289-90e7-70fb-a0cf-0bebf83bbaef" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_019eb289-90e7-7e62-8ef7-d67bb6f87030" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_OperatingLeasesAbstract_019eb289-90e7-7f04-9778-13418ad2d9b6" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_019eb289-90e7-7e62-8ef7-d67bb6f87030" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_019f711c-2185-7287-ba8d-234c8221fa1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7b05-a086-d67a801a4a39" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_019f711c-2185-7287-ba8d-234c8221fa1a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/LeasesScheduleofLeaseCostDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#LeasesScheduleofLeaseCostDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/LeasesScheduleofLeaseCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAbstract_019eb289-90e7-79a0-9a82-2a8d1205fa7d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCostAbstract_019eb289-90e7-7ad8-a8ec-9063bcfdf6f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCostAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-79a0-9a82-2a8d1205fa7d" xlink:to="loc_us-gaap_LeaseCostAbstract_019eb289-90e7-7ad8-a8ec-9063bcfdf6f1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_019eb289-90e7-7ad7-bbb2-55405b8b895a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseCostAbstract_019eb289-90e7-7ad8-a8ec-9063bcfdf6f1" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_019eb289-90e7-7ad7-bbb2-55405b8b895a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseInterestExpense_019eb289-90e7-7a17-81cd-9f812a89bade" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseInterestExpense"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseCostAbstract_019eb289-90e7-7ad8-a8ec-9063bcfdf6f1" xlink:to="loc_us-gaap_FinanceLeaseInterestExpense_019eb289-90e7-7a17-81cd-9f812a89bade" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_019eb289-90e7-7e54-baf3-9091b8cd6c01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseCost"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseCostAbstract_019eb289-90e7-7ad8-a8ec-9063bcfdf6f1" xlink:to="loc_us-gaap_OperatingLeaseCost_019eb289-90e7-7e54-baf3-9091b8cd6c01" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_019eb289-90e7-759b-ac87-edf9a83f0afd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCost"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeaseCostAbstract_019eb289-90e7-7ad8-a8ec-9063bcfdf6f1" xlink:to="loc_us-gaap_LeaseCost_019eb289-90e7-759b-ac87-edf9a83f0afd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DisclosureOfLeaseQuantitativeInformationAbstract_019eb289-90e7-7238-9147-4eae1b831c56" xlink:href="opc-20260630.xsd#opc_DisclosureOfLeaseQuantitativeInformationAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-79a0-9a82-2a8d1205fa7d" xlink:to="loc_opc_DisclosureOfLeaseQuantitativeInformationAbstract_019eb289-90e7-7238-9147-4eae1b831c56" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_WeightedAverageRemainingLeaseTermAbstract_019eb289-90e7-7032-9fa1-6546ce148d00" xlink:href="opc-20260630.xsd#opc_WeightedAverageRemainingLeaseTermAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DisclosureOfLeaseQuantitativeInformationAbstract_019eb289-90e7-7238-9147-4eae1b831c56" xlink:to="loc_opc_WeightedAverageRemainingLeaseTermAbstract_019eb289-90e7-7032-9fa1-6546ce148d00" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_019eb289-90e7-7875-921d-5c1354810fa9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_WeightedAverageRemainingLeaseTermAbstract_019eb289-90e7-7032-9fa1-6546ce148d00" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_019eb289-90e7-7875-921d-5c1354810fa9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_019eb289-90e7-76d4-8ccc-35070ff1c515" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_WeightedAverageRemainingLeaseTermAbstract_019eb289-90e7-7032-9fa1-6546ce148d00" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_019eb289-90e7-76d4-8ccc-35070ff1c515" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_WeightedAverageDiscountRateAbstract_019eb289-90e7-775e-9e73-a63f7ce91729" xlink:href="opc-20260630.xsd#opc_WeightedAverageDiscountRateAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_DisclosureOfLeaseQuantitativeInformationAbstract_019eb289-90e7-7238-9147-4eae1b831c56" xlink:to="loc_opc_WeightedAverageDiscountRateAbstract_019eb289-90e7-775e-9e73-a63f7ce91729" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_019eb289-90e7-70f4-a170-1b0c6b6a290e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_WeightedAverageDiscountRateAbstract_019eb289-90e7-775e-9e73-a63f7ce91729" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_019eb289-90e7-70f4-a170-1b0c6b6a290e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_019eb289-90e7-7883-937f-26ec795f5f86" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_WeightedAverageDiscountRateAbstract_019eb289-90e7-775e-9e73-a63f7ce91729" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_019eb289-90e7-7883-937f-26ec795f5f86" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/LeasesScheduleofCashPaidforAmountsIncludedintheMeasurementofLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#LeasesScheduleofCashPaidforAmountsIncludedintheMeasurementofLeaseLiabilitiesDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/LeasesScheduleofCashPaidforAmountsIncludedintheMeasurementofLeaseLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAbstract_019eb289-90e7-7eae-b1c7-ad0f6cf0c20c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeDisclosureAbstract_019eb289-90e7-7f3e-85cf-b54d623afcf5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeDisclosureAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7eae-b1c7-ad0f6cf0c20c" xlink:to="loc_us-gaap_LesseeDisclosureAbstract_019eb289-90e7-7f3e-85cf-b54d623afcf5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_CashFlowLesseeAbstract_019f1df9-878f-7297-acca-4491e8a9d6c2" xlink:href="opc-20260630.xsd#opc_CashFlowLesseeAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeDisclosureAbstract_019eb289-90e7-7f3e-85cf-b54d623afcf5" xlink:to="loc_opc_CashFlowLesseeAbstract_019f1df9-878f-7297-acca-4491e8a9d6c2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseInterestPaymentOnLiability_019f029e-cc89-759b-8560-ce60e4fa6ce0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseInterestPaymentOnLiability"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_CashFlowLesseeAbstract_019f1df9-878f-7297-acca-4491e8a9d6c2" xlink:to="loc_us-gaap_FinanceLeaseInterestPaymentOnLiability_019f029e-cc89-759b-8560-ce60e4fa6ce0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_019eb289-90e7-71bb-87d7-40703981ff4f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeasePayments"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_CashFlowLesseeAbstract_019f1df9-878f-7297-acca-4491e8a9d6c2" xlink:to="loc_us-gaap_OperatingLeasePayments_019eb289-90e7-71bb-87d7-40703981ff4f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments_019f029e-cc89-73ab-ba63-91ca52e85591" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeasePrincipalPayments"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_CashFlowLesseeAbstract_019f1df9-878f-7297-acca-4491e8a9d6c2" xlink:to="loc_us-gaap_FinanceLeasePrincipalPayments_019f029e-cc89-73ab-ba63-91ca52e85591" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019f029e-cc89-7be3-a309-9efa12a725c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeDisclosureAbstract_019eb289-90e7-7f3e-85cf-b54d623afcf5" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019f029e-cc89-7be3-a309-9efa12a725c0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/LeasesScheduleofMaturitiesofFinanceLeaseLiabilitiesandOperatingLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#LeasesScheduleofMaturitiesofFinanceLeaseLiabilitiesandOperatingLeaseLiabilitiesDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/LeasesScheduleofMaturitiesofFinanceLeaseLiabilitiesandOperatingLeaseLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAbstract_019eb289-90e7-7aa2-b09b-69e6bb458b16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_MaturityAnalysisOfFinanceAndOperatingLeaseLiabilitiesAbstract_019eb289-90e7-7bbb-bb31-c9c4997ea9c4" xlink:href="opc-20260630.xsd#opc_MaturityAnalysisOfFinanceAndOperatingLeaseLiabilitiesAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7aa2-b09b-69e6bb458b16" xlink:to="loc_opc_MaturityAnalysisOfFinanceAndOperatingLeaseLiabilitiesAbstract_019eb289-90e7-7bbb-bb31-c9c4997ea9c4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_MaturityAnalysisOfFinanceAndOperatingLeaseLiabilitiesAbstract_019eb289-90e7-7bbb-bb31-c9c4997ea9c4" xlink:to="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_019eb289-90e7-740a-87b2-81715d5e2982" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_019eb289-90e7-740a-87b2-81715d5e2982" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_019eb289-90e7-76b6-9a3a-4eec91d3dc52" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_019eb289-90e7-76b6-9a3a-4eec91d3dc52" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_019eb289-90e7-724b-ba85-3910c7515798" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_019eb289-90e7-724b-ba85-3910c7515798" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_019eb289-90e7-72be-a67f-b9a95b612726" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_019eb289-90e7-72be-a67f-b9a95b612726" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_019eb289-90e7-7c62-8a6e-5c92940a8041" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_019eb289-90e7-7c62-8a6e-5c92940a8041" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_FinanceLeaseLiabilityToBePaidDueAfterYearFour_019eb289-90e7-7a47-9594-2c32a2601fa7" xlink:href="opc-20260630.xsd#opc_FinanceLeaseLiabilityToBePaidDueAfterYearFour"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:to="loc_opc_FinanceLeaseLiabilityToBePaidDueAfterYearFour_019eb289-90e7-7a47-9594-2c32a2601fa7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_019eb289-90e7-78c5-af3c-c783d7e08635" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_019eb289-90e7-78c5-af3c-c783d7e08635" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_019eb289-90e7-7a2e-bf1b-03aa93a8795c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:to="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_019eb289-90e7-7a2e-bf1b-03aa93a8795c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_019eb289-90e7-7d4d-a4d1-f361ca95ac9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7ba7-b737-52d74dcdf432" xlink:to="loc_us-gaap_FinanceLeaseLiability_019eb289-90e7-7d4d-a4d1-f361ca95ac9d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_MaturityAnalysisOfFinanceAndOperatingLeaseLiabilitiesAbstract_019eb289-90e7-7bbb-bb31-c9c4997ea9c4" xlink:to="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_019eb289-90e7-7a45-bf3c-cc5c29ba9f8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_019eb289-90e7-7a45-bf3c-cc5c29ba9f8d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019eb289-90e7-7e0a-9f86-c6c2ba7b9300" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019eb289-90e7-7e0a-9f86-c6c2ba7b9300" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019eb289-90e7-74c7-b620-36973cd910fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019eb289-90e7-74c7-b620-36973cd910fc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019eb289-90e7-7a1d-bc00-16f5ed9579fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019eb289-90e7-7a1d-bc00-16f5ed9579fe" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019eb289-90e7-7531-aca7-1d70c3649168" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019eb289-90e7-7531-aca7-1d70c3649168" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour_019eb289-90e7-7c83-a14a-c54842004d07" xlink:href="opc-20260630.xsd#opc_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:to="loc_opc_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour_019eb289-90e7-7c83-a14a-c54842004d07" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019eb289-90e7-759a-9664-05a7eef6d6bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019eb289-90e7-759a-9664-05a7eef6d6bb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019eb289-90e7-7f1f-9875-17c5aa2a0272" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019eb289-90e7-7f1f-9875-17c5aa2a0272" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019eb289-90e7-7593-a663-dcac1119edbe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019eb289-90e7-7982-8d36-ba63e3d61d86" xlink:to="loc_us-gaap_OperatingLeaseLiability_019eb289-90e7-7593-a663-dcac1119edbe" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:href="opc-20260630.xsd#opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_MaturityAnalysisOfFinanceAndOperatingLeaseLiabilitiesAbstract_019eb289-90e7-7bbb-bb31-c9c4997ea9c4" xlink:to="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidRemainderOfFiscalYear_019eb289-90e7-7f85-b661-5c6f32a802b5" xlink:href="opc-20260630.xsd#opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidRemainderOfFiscalYear"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:to="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidRemainderOfFiscalYear_019eb289-90e7-7f85-b661-5c6f32a802b5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueNextTwelveMonths_019eb289-90e7-70b0-b08c-8a81d542b765" xlink:href="opc-20260630.xsd#opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueNextTwelveMonths"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:to="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueNextTwelveMonths_019eb289-90e7-70b0-b08c-8a81d542b765" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueYearTwo_019eb289-90e7-7969-ac0b-ed7d7214a25c" xlink:href="opc-20260630.xsd#opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueYearTwo"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:to="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueYearTwo_019eb289-90e7-7969-ac0b-ed7d7214a25c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueYearThree_019eb289-90e7-7ca0-a53a-8a11e7152f8d" xlink:href="opc-20260630.xsd#opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueYearThree"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:to="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueYearThree_019eb289-90e7-7ca0-a53a-8a11e7152f8d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueYearFour_019eb289-90e7-7008-9cb0-a4c6de698140" xlink:href="opc-20260630.xsd#opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueYearFour"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:to="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueYearFour_019eb289-90e7-7008-9cb0-a4c6de698140" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueAfterYearFour_019eb289-90e7-7970-bd89-07cdb2721e0e" xlink:href="opc-20260630.xsd#opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueAfterYearFour"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:to="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDueAfterYearFour_019eb289-90e7-7970-bd89-07cdb2721e0e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDue_019eb289-90e7-7052-af50-df0a9a7efafe" xlink:href="opc-20260630.xsd#opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDue"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:to="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityToBePaidDue_019eb289-90e7-7052-af50-df0a9a7efafe" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityUndiscountedExcessAmount_019eb289-90e7-7100-948f-a863d48dbdee" xlink:href="opc-20260630.xsd#opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:to="loc_opc_LesseeFinanceLeaseAndOperatingLeaseLiabilityUndiscountedExcessAmount_019eb289-90e7-7100-948f-a863d48dbdee" xlink:type="arc" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_FinanceLeaseAndOperatingLeaseLiability_019eb289-90e7-742c-b331-c426213f72d1" xlink:href="opc-20260630.xsd#opc_FinanceLeaseAndOperatingLeaseLiability"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_LesseeOperatingLeaseAndFinanceLeaseLiabilityPaymentDueAbstract_019eb289-90e7-7462-a647-12222f4ae323" xlink:to="loc_opc_FinanceLeaseAndOperatingLeaseLiability_019eb289-90e7-742c-b331-c426213f72d1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/LeasesScheduleofLeaseIncomeDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#LeasesScheduleofLeaseIncomeDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/LeasesScheduleofLeaseIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAbstract_019eb289-90e7-7880-a91a-16296538824f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorDisclosureAbstract_019eb289-90e7-7880-9f32-1b289f8e9b27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorDisclosureAbstract"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_019eb289-90e7-7880-a91a-16296538824f" xlink:to="loc_us-gaap_LessorDisclosureAbstract_019eb289-90e7-7880-9f32-1b289f8e9b27" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLeaseIncome_019eb289-90e7-7306-9fcd-93e2b1936281" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLeaseIncome"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LessorDisclosureAbstract_019eb289-90e7-7880-9f32-1b289f8e9b27" xlink:to="loc_us-gaap_OperatingLeaseLeaseIncome_019eb289-90e7-7306-9fcd-93e2b1936281" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RestrictedCashandShortTermInvestmentsDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#RestrictedCashandShortTermInvestmentsDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RestrictedCashandShortTermInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedInvestmentsNoteAbstract_019eb289-90e7-7a06-9e65-8a4260945ff8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedInvestmentsNoteAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019eb289-90e7-7cc6-910d-7998413e3e48" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedInvestmentsNoteAbstract_019eb289-90e7-7a06-9e65-8a4260945ff8" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019eb289-90e7-7cc6-910d-7998413e3e48" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_019eb289-90e7-70c0-b40a-6d23f464a93e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalents"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedInvestmentsNoteAbstract_019eb289-90e7-7a06-9e65-8a4260945ff8" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_019eb289-90e7-70c0-b40a-6d23f464a93e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019eb289-90e7-7c06-88b1-752aa1213ca6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedInvestmentsNoteAbstract_019eb289-90e7-7a06-9e65-8a4260945ff8" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019eb289-90e7-7c06-88b1-752aa1213ca6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/RegulatoryAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#RegulatoryAssetsandLiabilitiesDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/RegulatoryAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract_019eb289-90e7-7d84-a734-788505fc3ca3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_019eb289-90e7-7626-a6ab-3c0cc65285c6" xlink:href="opc-20260630.xsd#opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract_019eb289-90e7-7d84-a734-788505fc3ca3" xlink:to="loc_opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_019eb289-90e7-7626-a6ab-3c0cc65285c6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetAxis_019eb289-90e7-754f-97b2-17a4cb9ee413" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_019eb289-90e7-7626-a6ab-3c0cc65285c6" xlink:to="loc_us-gaap_RegulatoryAssetAxis_019eb289-90e7-754f-97b2-17a4cb9ee413" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetAxis_019eb289-90e7-754f-97b2-17a4cb9ee413" xlink:to="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PremiumAndLossOnReacquiredDebtMember_019eb289-90e7-7224-ad3b-c4e7015f2a2f" xlink:href="opc-20260630.xsd#opc_PremiumAndLossOnReacquiredDebtMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_PremiumAndLossOnReacquiredDebtMember_019eb289-90e7-7224-ad3b-c4e7015f2a2f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_AmortizationOfFinancingLeasesMember_019eb289-90e7-7452-a7ca-77815fda2cf1" xlink:href="opc-20260630.xsd#opc_AmortizationOfFinancingLeasesMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_AmortizationOfFinancingLeasesMember_019eb289-90e7-7452-a7ca-77815fda2cf1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_UnamortizedDeferredOutageCostsNetMember_019eb289-90e7-78f3-aebc-225d2b0146d7" xlink:href="opc-20260630.xsd#opc_UnamortizedDeferredOutageCostsNetMember"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_UnamortizedDeferredOutageCostsNetMember_019eb289-90e7-78f3-aebc-225d2b0146d7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_UnamortizedDeferredCoalFiredOutageCostsNetMember_019eb289-90e7-7e06-9517-916b331bec3a" xlink:href="opc-20260630.xsd#opc_UnamortizedDeferredCoalFiredOutageCostsNetMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_UnamortizedDeferredOutageCostsNetMember_019eb289-90e7-78f3-aebc-225d2b0146d7" xlink:to="loc_opc_UnamortizedDeferredCoalFiredOutageCostsNetMember_019eb289-90e7-7e06-9517-916b331bec3a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_UnamortizedDeferredNuclearRefuelingOutageCostsNetMember_019eb289-90e7-7c3f-a1e4-d755ddcdc890" xlink:href="opc-20260630.xsd#opc_UnamortizedDeferredNuclearRefuelingOutageCostsNetMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_UnamortizedDeferredOutageCostsNetMember_019eb289-90e7-78f3-aebc-225d2b0146d7" xlink:to="loc_opc_UnamortizedDeferredNuclearRefuelingOutageCostsNetMember_019eb289-90e7-7c3f-a1e4-d755ddcdc890" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationCostsMember_019eb289-90e7-7c28-a290-cf45e203fa63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationCostsMember"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_us-gaap_AssetRetirementObligationCostsMember_019eb289-90e7-7c28-a290-cf45e203fa63" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_UnamortizedDeferredDepreciationExpenseMember_019eb289-90e7-7344-b78f-6644155dcdca" xlink:href="opc-20260630.xsd#opc_UnamortizedDeferredDepreciationExpenseMember"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_UnamortizedDeferredDepreciationExpenseMember_019eb289-90e7-7344-b78f-6644155dcdca" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_JointlyOwnedUtilityPlantDeferredChargesRelatedToVogtleUnitsNo.3AndNo.4TrainingCostsMember_019eb289-90e7-771d-b5cb-6a9d89aab3db" xlink:href="opc-20260630.xsd#opc_JointlyOwnedUtilityPlantDeferredChargesRelatedToVogtleUnitsNo.3AndNo.4TrainingCostsMember"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_JointlyOwnedUtilityPlantDeferredChargesRelatedToVogtleUnitsNo.3AndNo.4TrainingCostsMember_019eb289-90e7-771d-b5cb-6a9d89aab3db" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_InterestRateOptionCostMember_019eb289-90e7-709b-9e73-a4ce4d56b347" xlink:href="opc-20260630.xsd#opc_InterestRateOptionCostMember"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_InterestRateOptionCostMember_019eb289-90e7-709b-9e73-a4ce4d56b347" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DeferredEffectOnNetMarginForEnergyFacilitiesMember_019eb289-90e7-706d-9509-9743c5c91619" xlink:href="opc-20260630.xsd#opc_DeferredEffectOnNetMarginForEnergyFacilitiesMember"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_DeferredEffectOnNetMarginForEnergyFacilitiesMember_019eb289-90e7-706d-9509-9743c5c91619" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_InventoryAdjustmentsMember_019eb289-90e7-7766-bec4-7362586d993c" xlink:href="opc-20260630.xsd#opc_InventoryAdjustmentsMember"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_InventoryAdjustmentsMember_019eb289-90e7-7766-bec4-7362586d993c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_AccumulatedRetirementCostsOtherObligationMember_019eb289-90e7-7612-9042-92d66c8e662a" xlink:href="opc-20260630.xsd#opc_AccumulatedRetirementCostsOtherObligationMember"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_AccumulatedRetirementCostsOtherObligationMember_019eb289-90e7-7612-9042-92d66c8e662a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NaturalGasHedgesMember_019fb14c-d92b-7307-a600-834bb9fb025f" xlink:href="opc-20260630.xsd#opc_NaturalGasHedgesMember"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_NaturalGasHedgesMember_019fb14c-d92b-7307-a600-834bb9fb025f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OtherRegulatoryAssetsMember_019eb289-90e7-7f4e-b9b9-9e0f7dbd1712" xlink:href="opc-20260630.xsd#opc_OtherRegulatoryAssetsMember"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryAssetDomain_019eb289-90e7-7c35-b775-ee452f44706d" xlink:to="loc_opc_OtherRegulatoryAssetsMember_019eb289-90e7-7f4e-b9b9-9e0f7dbd1712" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityAxis_019eb289-90e7-754a-9034-7d06fd675155" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_019eb289-90e7-7626-a6ab-3c0cc65285c6" xlink:to="loc_us-gaap_RegulatoryLiabilityAxis_019eb289-90e7-754a-9034-7d06fd675155" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_019eb289-90e7-754a-9034-7d06fd675155" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DeferredEffectsOnNetMarginForEnergyFacilitiesMember_019eb289-90e7-7fbc-8e87-66a8619dc5df" xlink:href="opc-20260630.xsd#opc_DeferredEffectsOnNetMarginForEnergyFacilitiesMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:to="loc_opc_DeferredEffectsOnNetMarginForEnergyFacilitiesMember_019eb289-90e7-7fbc-8e87-66a8619dc5df" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_MajorMaintenanceSinkingFundMember_019eb289-90e7-789a-87df-82ec52f746f3" xlink:href="opc-20260630.xsd#opc_MajorMaintenanceSinkingFundMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:to="loc_opc_MajorMaintenanceSinkingFundMember_019eb289-90e7-789a-87df-82ec52f746f3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DeferredDebtServiceAdderMember_019eb289-90e7-7293-8281-3f2e34341225" xlink:href="opc-20260630.xsd#opc_DeferredDebtServiceAdderMember"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:to="loc_opc_DeferredDebtServiceAdderMember_019eb289-90e7-7293-8281-3f2e34341225" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationCostsMember_019eb289-90e7-7706-81d3-b8d3f39903c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationCostsMember"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:to="loc_us-gaap_AssetRetirementObligationCostsMember_019eb289-90e7-7706-81d3-b8d3f39903c1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_RevenueDeferralPlanMember_019eb289-90e7-76a9-8fcb-3e451ad8984b" xlink:href="opc-20260630.xsd#opc_RevenueDeferralPlanMember"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:to="loc_opc_RevenueDeferralPlanMember_019eb289-90e7-76a9-8fcb-3e451ad8984b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OtherRevenueDeferralPlanMember_019eb289-90e7-79d5-b3f2-ae35985bdcbd" xlink:href="opc-20260630.xsd#opc_OtherRevenueDeferralPlanMember"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:to="loc_opc_OtherRevenueDeferralPlanMember_019eb289-90e7-79d5-b3f2-ae35985bdcbd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NaturalGasHedgesMember_019eb289-90e7-7204-a1c9-076296cb0dec" xlink:href="opc-20260630.xsd#opc_NaturalGasHedgesMember"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:to="loc_opc_NaturalGasHedgesMember_019eb289-90e7-7204-a1c9-076296cb0dec" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DeferralNuclearProductionTaxMember_019eb289-90e7-7135-8c37-a2506bbaf5a6" xlink:href="opc-20260630.xsd#opc_DeferralNuclearProductionTaxMember"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:to="loc_opc_DeferralNuclearProductionTaxMember_019eb289-90e7-7135-8c37-a2506bbaf5a6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OtherRegulatoryLiabilitiesMember_019eb289-90e7-7d56-999a-970b3515b034" xlink:href="opc-20260630.xsd#opc_OtherRegulatoryLiabilitiesMember"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_019eb289-90e7-7f8a-a6e8-a630f101fc55" xlink:to="loc_opc_OtherRegulatoryLiabilitiesMember_019eb289-90e7-7d56-999a-970b3515b034" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_JointlyOwnedUtilityPlantNameAxis_019eb289-90e7-7572-bec9-724b3eaaeffe" xlink:href="opc-20260630.xsd#opc_JointlyOwnedUtilityPlantNameAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_019eb289-90e7-7626-a6ab-3c0cc65285c6" xlink:to="loc_opc_JointlyOwnedUtilityPlantNameAxis_019eb289-90e7-7572-bec9-724b3eaaeffe" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_JointlyOwnedUtilityPlantNameDomain_019eb289-90e7-75d4-b79a-0f37bdbf04d2" xlink:href="opc-20260630.xsd#opc_JointlyOwnedUtilityPlantNameDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_JointlyOwnedUtilityPlantNameAxis_019eb289-90e7-7572-bec9-724b3eaaeffe" xlink:to="loc_opc_JointlyOwnedUtilityPlantNameDomain_019eb289-90e7-75d4-b79a-0f37bdbf04d2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_AshpondAndOtherMember_019eb289-90e7-7434-89d8-4c28f20d2642" xlink:href="opc-20260630.xsd#opc_AshpondAndOtherMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_JointlyOwnedUtilityPlantNameDomain_019eb289-90e7-75d4-b79a-0f37bdbf04d2" xlink:to="loc_opc_AshpondAndOtherMember_019eb289-90e7-7434-89d8-4c28f20d2642" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PlantVogtleMember_019eb289-90e7-726a-b8e9-710716eba0fd" xlink:href="opc-20260630.xsd#opc_PlantVogtleMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_JointlyOwnedUtilityPlantNameDomain_019eb289-90e7-75d4-b79a-0f37bdbf04d2" xlink:to="loc_opc_PlantVogtleMember_019eb289-90e7-726a-b8e9-710716eba0fd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PlantWansleyMember_019eb289-90e7-757e-8a4a-38f7b450d37a" xlink:href="opc-20260630.xsd#opc_PlantWansleyMember"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_JointlyOwnedUtilityPlantNameDomain_019eb289-90e7-75d4-b79a-0f37bdbf04d2" xlink:to="loc_opc_PlantWansleyMember_019eb289-90e7-757e-8a4a-38f7b450d37a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DeferredChargesRelatedToVogtleUnitsMember_019eb289-90e7-7cf1-9134-c96a1c188b75" xlink:href="opc-20260630.xsd#opc_DeferredChargesRelatedToVogtleUnitsMember"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_JointlyOwnedUtilityPlantNameDomain_019eb289-90e7-75d4-b79a-0f37bdbf04d2" xlink:to="loc_opc_DeferredChargesRelatedToVogtleUnitsMember_019eb289-90e7-7cf1-9134-c96a1c188b75" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_TASmithEnergyFacilityMember_019eb289-90e7-7e9e-8e3f-1f75554a61d1" xlink:href="opc-20260630.xsd#opc_TASmithEnergyFacilityMember"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_JointlyOwnedUtilityPlantNameDomain_019eb289-90e7-75d4-b79a-0f37bdbf04d2" xlink:to="loc_opc_TASmithEnergyFacilityMember_019eb289-90e7-7e9e-8e3f-1f75554a61d1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_BCSmithEnergyFacilityMember_019eb289-90e7-7e69-b8a3-28ae131a2de3" xlink:href="opc-20260630.xsd#opc_BCSmithEnergyFacilityMember"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_JointlyOwnedUtilityPlantNameDomain_019eb289-90e7-75d4-b79a-0f37bdbf04d2" xlink:to="loc_opc_BCSmithEnergyFacilityMember_019eb289-90e7-7e69-b8a3-28ae131a2de3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_HawkRoadMember_019eb289-90e7-7c4b-b2cb-dbff963d5c15" xlink:href="opc-20260630.xsd#opc_HawkRoadMember"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_JointlyOwnedUtilityPlantNameDomain_019eb289-90e7-75d4-b79a-0f37bdbf04d2" xlink:to="loc_opc_HawkRoadMember_019eb289-90e7-7c4b-b2cb-dbff963d5c15" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019eb289-90e7-7d14-9309-f19022ba07b7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_019eb289-90e7-7626-a6ab-3c0cc65285c6" xlink:to="loc_srt_RangeAxis_019eb289-90e7-7d14-9309-f19022ba07b7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eb289-90e7-793a-82ee-41ea743137fc" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_RangeAxis_019eb289-90e7-7d14-9309-f19022ba07b7" xlink:to="loc_srt_RangeMember_019eb289-90e7-793a-82ee-41ea743137fc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019eb289-90e7-7231-81f3-e2400361b1ea" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_RangeMember_019eb289-90e7-793a-82ee-41ea743137fc" xlink:to="loc_srt_MinimumMember_019eb289-90e7-7231-81f3-e2400361b1ea" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019eb289-90e7-78e5-8bb4-764a03401613" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_RangeMember_019eb289-90e7-793a-82ee-41ea743137fc" xlink:to="loc_srt_MaximumMember_019eb289-90e7-78e5-8bb4-764a03401613" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_RegulatoryAssetsAndLiabilitiesLineItems_019eb289-90e7-7c3e-bb95-5f5623c20331" xlink:href="opc-20260630.xsd#opc_RegulatoryAssetsAndLiabilitiesLineItems"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfRegulatoryAssetsAndLiabilitiesTable_019eb289-90e7-7626-a6ab-3c0cc65285c6" xlink:to="loc_opc_RegulatoryAssetsAndLiabilitiesLineItems_019eb289-90e7-7c3e-bb95-5f5623c20331" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_019eb289-90e7-7767-b2a5-8e17cd468df6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsNoncurrent"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_RegulatoryAssetsAndLiabilitiesLineItems_019eb289-90e7-7c3e-bb95-5f5623c20331" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_019eb289-90e7-7767-b2a5-8e17cd468df6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_019eb289-90e7-7a31-aaac-52c2d3fa55e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityNoncurrent"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_RegulatoryAssetsAndLiabilitiesLineItems_019eb289-90e7-7c3e-bb95-5f5623c20331" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_019eb289-90e7-7a31-aaac-52c2d3fa55e0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetRegulatoryAssets_019eb289-90e7-7aed-aa34-d61111a5369f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetRegulatoryAssets"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_RegulatoryAssetsAndLiabilitiesLineItems_019eb289-90e7-7c3e-bb95-5f5623c20331" xlink:to="loc_us-gaap_NetRegulatoryAssets_019eb289-90e7-7aed-aa34-d61111a5369f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetAmortizationPeriod_019eb289-90e7-7895-8b11-db252a12f342" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetAmortizationPeriod"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_RegulatoryAssetsAndLiabilitiesLineItems_019eb289-90e7-7c3e-bb95-5f5623c20331" xlink:to="loc_us-gaap_RegulatoryAssetAmortizationPeriod_019eb289-90e7-7895-8b11-db252a12f342" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OperatingLicenseExpectedExtensionPeriod_019eb289-90e7-7ddd-acc4-b52b77d48cc7" xlink:href="opc-20260630.xsd#opc_OperatingLicenseExpectedExtensionPeriod"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_RegulatoryAssetsAndLiabilitiesLineItems_019eb289-90e7-7c3e-bb95-5f5623c20331" xlink:to="loc_opc_OperatingLicenseExpectedExtensionPeriod_019eb289-90e7-7ddd-acc4-b52b77d48cc7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_OperatingLicensePeriod_019eb289-90e7-731a-aad1-dc03cd6a03f1" xlink:href="opc-20260630.xsd#opc_OperatingLicensePeriod"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_RegulatoryAssetsAndLiabilitiesLineItems_019eb289-90e7-7c3e-bb95-5f5623c20331" xlink:to="loc_opc_OperatingLicensePeriod_019eb289-90e7-731a-aad1-dc03cd6a03f1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityAmortizationPeriod_019eb289-90e7-7a5e-892e-6cf7b85e685e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityAmortizationPeriod"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_RegulatoryAssetsAndLiabilitiesLineItems_019eb289-90e7-7c3e-bb95-5f5623c20331" xlink:to="loc_us-gaap_RegulatoryLiabilityAmortizationPeriod_019eb289-90e7-7a5e-892e-6cf7b85e685e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DebtDepartmentofEnergyLoanGuaranteeDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#DebtDepartmentofEnergyLoanGuaranteeDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DebtDepartmentofEnergyLoanGuaranteeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract_019eb289-90e7-78b1-b55d-9353c756056c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7f85-9d2b-18ad789c7f51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_019eb289-90e7-78b1-b55d-9353c756056c" xlink:to="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7f85-9d2b-18ad789c7f51" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019eb289-90e7-756c-a46e-de4373ffafab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7f85-9d2b-18ad789c7f51" xlink:to="loc_us-gaap_DebtInstrumentAxis_019eb289-90e7-756c-a46e-de4373ffafab" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eb289-90e7-7d5a-9461-e1d90354cd57" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eb289-90e7-756c-a46e-de4373ffafab" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eb289-90e7-7d5a-9461-e1d90354cd57" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DebtFromFederalFinancingBankMember_019eb289-90e7-7a9b-bd88-03d09ead3b4b" xlink:href="opc-20260630.xsd#opc_DebtFromFederalFinancingBankMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eb289-90e7-7d5a-9461-e1d90354cd57" xlink:to="loc_opc_DebtFromFederalFinancingBankMember_019eb289-90e7-7a9b-bd88-03d09ead3b4b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019eb289-90e7-7e4b-b0a2-8715de856062" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7f85-9d2b-18ad789c7f51" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019eb289-90e7-7e4b-b0a2-8715de856062" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-751c-af65-6b9e32212b83" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019eb289-90e7-7e4b-b0a2-8715de856062" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-751c-af65-6b9e32212b83" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019eb289-90e7-7415-a452-e3aa76478586" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-751c-af65-6b9e32212b83" xlink:to="loc_us-gaap_SecuredDebtMember_019eb289-90e7-7415-a452-e3aa76478586" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_019eb289-90e7-7331-9caa-d834879f619e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsByNatureAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7f85-9d2b-18ad789c7f51" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_019eb289-90e7-7331-9caa-d834879f619e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019eb289-90e7-7c34-be11-f93b11051475" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019eb289-90e7-7331-9caa-d834879f619e" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019eb289-90e7-7c34-be11-f93b11051475" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialGuaranteeMember_019eb289-90e7-75fe-a8b1-9596b4a3c849" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialGuaranteeMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019eb289-90e7-7c34-be11-f93b11051475" xlink:to="loc_us-gaap_FinancialGuaranteeMember_019eb289-90e7-75fe-a8b1-9596b4a3c849" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-7b19-a2d2-3714509a0a30" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7f85-9d2b-18ad789c7f51" xlink:to="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-7b19-a2d2-3714509a0a30" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LineOfCreditFacilityMaximumBorrowingCapacityDesignatedForCapitalizedInterest_019eb289-90e7-785c-a1b9-e75728dd0a7e" xlink:href="opc-20260630.xsd#opc_LineOfCreditFacilityMaximumBorrowingCapacityDesignatedForCapitalizedInterest"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-7b19-a2d2-3714509a0a30" xlink:to="loc_opc_LineOfCreditFacilityMaximumBorrowingCapacityDesignatedForCapitalizedInterest_019eb289-90e7-785c-a1b9-e75728dd0a7e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019eb289-90e7-784a-8a63-119cbf53527c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-7b19-a2d2-3714509a0a30" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019eb289-90e7-784a-8a63-119cbf53527c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019eb289-90e7-766d-a849-b00ddfdba517" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-7b19-a2d2-3714509a0a30" xlink:to="loc_us-gaap_LongTermDebt_019eb289-90e7-766d-a849-b00ddfdba517" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DebtRuralUtilitiesServiceGuaranteedLoansDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#DebtRuralUtilitiesServiceGuaranteedLoansDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DebtRuralUtilitiesServiceGuaranteedLoansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract_019eb289-90e7-70ac-a1d9-73707a971094" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_019eb289-90e7-70ac-a1d9-73707a971094" xlink:to="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019eb289-90e7-74db-a8e7-d91ff834a909" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:to="loc_us-gaap_DebtInstrumentAxis_019eb289-90e7-74db-a8e7-d91ff834a909" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eb289-90e7-7bab-8aba-01f1b52921a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eb289-90e7-74db-a8e7-d91ff834a909" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eb289-90e7-7bab-8aba-01f1b52921a1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DebtFromFederalFinancingBankMember_019eb289-90e7-7107-a3ac-9d1e1add22e6" xlink:href="opc-20260630.xsd#opc_DebtFromFederalFinancingBankMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eb289-90e7-7bab-8aba-01f1b52921a1" xlink:to="loc_opc_DebtFromFederalFinancingBankMember_019eb289-90e7-7107-a3ac-9d1e1add22e6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_019eb289-90e7-76f6-b704-c298eecc7319" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsByNatureAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_019eb289-90e7-76f6-b704-c298eecc7319" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019eb289-90e7-75db-844a-e609a0679a81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019eb289-90e7-76f6-b704-c298eecc7319" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019eb289-90e7-75db-844a-e609a0679a81" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_DebtFromFederalFinancingBankRuralUtilitiesServiceGuaranteedLoansMember_019eb289-90e7-7888-a6b6-3083f07e9a2b" xlink:href="opc-20260630.xsd#opc_DebtFromFederalFinancingBankRuralUtilitiesServiceGuaranteedLoansMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019eb289-90e7-75db-844a-e609a0679a81" xlink:to="loc_opc_DebtFromFederalFinancingBankRuralUtilitiesServiceGuaranteedLoansMember_019eb289-90e7-7888-a6b6-3083f07e9a2b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019eb289-90e7-7958-b28a-710b9f3cc3f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019eb289-90e7-7958-b28a-710b9f3cc3f1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-7c53-b032-9ba8f6187d74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019eb289-90e7-7958-b28a-710b9f3cc3f1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-7c53-b032-9ba8f6187d74" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019eb289-90e7-7897-920e-1677ed24f882" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-7c53-b032-9ba8f6187d74" xlink:to="loc_us-gaap_SecuredDebtMember_019eb289-90e7-7897-920e-1677ed24f882" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019fb156-759c-7f69-a246-2e4119c16152" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-7c53-b032-9ba8f6187d74" xlink:to="loc_us-gaap_CommercialPaperMember_019fb156-759c-7f69-a246-2e4119c16152" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionAxis_019fb152-71b4-7e71-a697-28ef9e31db7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionAxis"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:to="loc_us-gaap_AssetAcquisitionAxis_019fb152-71b4-7e71-a697-28ef9e31db7b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_019fb152-71b4-7082-bf59-ff9d5c4dd59c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetAcquisitionAxis_019fb152-71b4-7e71-a697-28ef9e31db7b" xlink:to="loc_us-gaap_AssetAcquisitionDomain_019fb152-71b4-7082-bf59-ff9d5c4dd59c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_WashingtonAndBacontonAcquisitionMember_019fb152-cd28-723d-b38d-52441761f457" xlink:href="opc-20260630.xsd#opc_WashingtonAndBacontonAcquisitionMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetAcquisitionDomain_019fb152-71b4-7082-bf59-ff9d5c4dd59c" xlink:to="loc_opc_WashingtonAndBacontonAcquisitionMember_019fb152-cd28-723d-b38d-52441761f457" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationTypeAxis_019fb153-fd24-74fb-94df-ebdd02cf1dfa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationTypeAxis"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:to="loc_us-gaap_ReclassificationTypeAxis_019fb153-fd24-74fb-94df-ebdd02cf1dfa" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationTypeDomain_019fb153-fd24-7b56-b093-ffe5e7213785" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationTypeAxis_019fb153-fd24-74fb-94df-ebdd02cf1dfa" xlink:to="loc_us-gaap_ReclassificationTypeDomain_019fb153-fd24-7b56-b093-ffe5e7213785" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOtherMember_019fb154-2fef-7a7c-892e-28d044bb6dd4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationOtherMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationTypeDomain_019fb153-fd24-7b56-b093-ffe5e7213785" xlink:to="loc_us-gaap_ReclassificationOtherMember_019fb154-2fef-7a7c-892e-28d044bb6dd4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_019fb154-5b3c-786c-ad60-cdb32dc032ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_019fb154-5b3c-786c-ad60-cdb32dc032ba" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019fb154-5b3c-7aa5-b9be-8daa228e10db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019fb154-5b3c-786c-ad60-cdb32dc032ba" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019fb154-5b3c-7aa5-b9be-8daa228e10db" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019fb154-7e25-7f07-a700-650c723b4234" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_019fb154-5b3c-7aa5-b9be-8daa228e10db" xlink:to="loc_us-gaap_CommercialPaperMember_019fb154-7e25-7f07-a700-650c723b4234" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019f6f7c-6045-7dc7-8f94-6a64a00acb5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019f6f7c-6045-7dc7-8f94-6a64a00acb5b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019f6f7c-6045-74aa-bca6-6d3afd4e5d71" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019f6f7c-6045-7dc7-8f94-6a64a00acb5b" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019f6f7c-6045-74aa-bca6-6d3afd4e5d71" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019f6f7c-765d-7177-a1be-01c351a418d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019f6f7c-6045-74aa-bca6-6d3afd4e5d71" xlink:to="loc_us-gaap_SubsequentEventMember_019f6f7c-765d-7177-a1be-01c351a418d0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-71c7-87ee-7b93b79a9f5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb289-90e7-7da0-abef-2b624f6b2ae9" xlink:to="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-71c7-87ee-7b93b79a9f5f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_019eb289-90e7-7672-9ab6-b5d7e2473711" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-71c7-87ee-7b93b79a9f5f" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_019eb289-90e7-7672-9ab6-b5d7e2473711" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019fb153-a14d-75b7-811a-36db8230e09f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-71c7-87ee-7b93b79a9f5f" xlink:to="loc_us-gaap_ShortTermBorrowings_019fb153-a14d-75b7-811a-36db8230e09f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019fb155-33b8-7bd1-adc3-ea2e0e425e35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb289-90e7-71c7-87ee-7b93b79a9f5f" xlink:to="loc_us-gaap_LongTermDebt_019fb155-33b8-7bd1-adc3-ea2e0e425e35" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DebtRuralUtilitiesServiceEmpoweringRuralAmericaNewERALoanDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#DebtRuralUtilitiesServiceEmpoweringRuralAmericaNewERALoanDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DebtRuralUtilitiesServiceEmpoweringRuralAmericaNewERALoanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract_019fb181-57eb-7cdc-b98e-6ac877c11832" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019fb181-57eb-7620-b555-e14c1742882b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_019fb181-57eb-7cdc-b98e-6ac877c11832" xlink:to="loc_us-gaap_DebtInstrumentTable_019fb181-57eb-7620-b555-e14c1742882b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019fb182-1524-7193-b7db-860103eb4d9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019fb181-57eb-7620-b555-e14c1742882b" xlink:to="loc_us-gaap_DebtInstrumentAxis_019fb182-1524-7193-b7db-860103eb4d9c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fb182-1524-7f21-89fe-50661dacca12" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_019fb182-1524-7193-b7db-860103eb4d9c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fb182-1524-7f21-89fe-50661dacca12" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_RuralUtilitiesServiceEmpoweringRuralAmericaNewERALoanMember_019fce50-c4a8-7ed2-9753-e1e70618ab3d" xlink:href="opc-20260630.xsd#opc_RuralUtilitiesServiceEmpoweringRuralAmericaNewERALoanMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019fb182-1524-7f21-89fe-50661dacca12" xlink:to="loc_opc_RuralUtilitiesServiceEmpoweringRuralAmericaNewERALoanMember_019fce50-c4a8-7ed2-9753-e1e70618ab3d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019fb182-1524-7ab8-8157-6285f8bec5e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019fb181-57eb-7620-b555-e14c1742882b" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019fb182-1524-7ab8-8157-6285f8bec5e8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fb182-1524-70ce-95ca-0065fca7a001" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019fb182-1524-7ab8-8157-6285f8bec5e8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fb182-1524-70ce-95ca-0065fca7a001" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxableMunicipalBondsMember_019fd283-a6e1-77de-86da-056f32364de2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxableMunicipalBondsMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019fb182-1524-70ce-95ca-0065fca7a001" xlink:to="loc_us-gaap_TaxableMunicipalBondsMember_019fd283-a6e1-77de-86da-056f32364de2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019fd283-e2e6-7542-a78e-8953b97d1fc2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019fb182-1524-70ce-95ca-0065fca7a001" xlink:to="loc_us-gaap_CommercialPaperMember_019fd283-e2e6-7542-a78e-8953b97d1fc2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019fb182-1524-778c-b8dc-be9878325614" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019fb181-57eb-7620-b555-e14c1742882b" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019fb182-1524-778c-b8dc-be9878325614" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019fb182-1524-776f-b35f-3aa360623f4f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019fb182-1524-778c-b8dc-be9878325614" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019fb182-1524-776f-b35f-3aa360623f4f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019fb182-1524-719d-9743-06693f783b3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019fb182-1524-776f-b35f-3aa360623f4f" xlink:to="loc_us-gaap_SubsequentEventMember_019fb182-1524-719d-9743-06693f783b3d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationTypeAxis_019fb182-1524-7a08-aed4-9c6d3914a6d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationTypeAxis"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019fb181-57eb-7620-b555-e14c1742882b" xlink:to="loc_us-gaap_ReclassificationTypeAxis_019fb182-1524-7a08-aed4-9c6d3914a6d0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationTypeDomain_019fb182-1524-705a-a0e8-15cf9d2e2281" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationTypeAxis_019fb182-1524-7a08-aed4-9c6d3914a6d0" xlink:to="loc_us-gaap_ReclassificationTypeDomain_019fb182-1524-705a-a0e8-15cf9d2e2281" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOtherMember_019fb182-1524-782c-9fd8-2cb663c92f4f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationOtherMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationTypeDomain_019fb182-1524-705a-a0e8-15cf9d2e2281" xlink:to="loc_us-gaap_ReclassificationOtherMember_019fb182-1524-782c-9fd8-2cb663c92f4f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_019fd283-e2e6-7393-874a-ccee07fa9f7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019fb181-57eb-7620-b555-e14c1742882b" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_019fd283-e2e6-7393-874a-ccee07fa9f7c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019fd283-e2e6-775f-9939-ee8f230ef5ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019fd283-e2e6-7393-874a-ccee07fa9f7c" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019fd283-e2e6-775f-9939-ee8f230ef5ad" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019fd283-e2e6-7f5a-9e7c-53ba551b1fbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_019fd283-e2e6-775f-9939-ee8f230ef5ad" xlink:to="loc_us-gaap_CommercialPaperMember_019fd283-e2e6-7f5a-9e7c-53ba551b1fbb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fb181-57eb-7479-89d6-935144a81248" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_019fb181-57eb-7620-b555-e14c1742882b" xlink:to="loc_us-gaap_DebtInstrumentLineItems_019fb181-57eb-7479-89d6-935144a81248" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019fb182-1524-7084-8b28-bda299654147" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fb181-57eb-7479-89d6-935144a81248" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019fb182-1524-7084-8b28-bda299654147" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019fce55-138b-70c6-b558-b2414f99424b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fb181-57eb-7479-89d6-935144a81248" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019fce55-138b-70c6-b558-b2414f99424b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts_019fce52-7323-7180-b9d7-205316e92072" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDebtExtinguishmentCosts"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fb181-57eb-7479-89d6-935144a81248" xlink:to="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts_019fce52-7323-7180-b9d7-205316e92072" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_019fb182-1524-7f1c-b06b-1ecfcef5b382" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fb181-57eb-7479-89d6-935144a81248" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_019fb182-1524-7f1c-b06b-1ecfcef5b382" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019fb182-1524-7584-9910-10d9447e78fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fb181-57eb-7479-89d6-935144a81248" xlink:to="loc_us-gaap_LongTermDebt_019fb182-1524-7584-9910-10d9447e78fc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019fd283-e2e6-76ba-8978-dab111c0e432" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fb181-57eb-7479-89d6-935144a81248" xlink:to="loc_us-gaap_ShortTermBorrowings_019fd283-e2e6-76ba-8978-dab111c0e432" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DebtCFCTermLoanDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#DebtCFCTermLoanDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DebtCFCTermLoanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract_019fd28a-44d2-788d-aef3-818006056d5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ScheduleOfDebtInstrumentsTable_019fd28a-44d2-77f9-8f1a-10462a2d1e94" xlink:href="opc-20260630.xsd#opc_ScheduleOfDebtInstrumentsTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_019fd28a-44d2-788d-aef3-818006056d5a" xlink:to="loc_opc_ScheduleOfDebtInstrumentsTable_019fd28a-44d2-77f9-8f1a-10462a2d1e94" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019fd28a-44d2-7c90-9eee-673fcbd3554b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019fd28a-44d2-77f9-8f1a-10462a2d1e94" xlink:to="loc_us-gaap_DebtInstrumentAxis_019fd28a-44d2-7c90-9eee-673fcbd3554b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fd28a-44d2-7d38-996d-835b16a20efb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_019fd28a-44d2-7c90-9eee-673fcbd3554b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fd28a-44d2-7d38-996d-835b16a20efb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_CFCTermLoanMember_019fd28a-44d2-7747-8b19-75a002195444" xlink:href="opc-20260630.xsd#opc_CFCTermLoanMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019fd28a-44d2-7d38-996d-835b16a20efb" xlink:to="loc_opc_CFCTermLoanMember_019fd28a-44d2-7747-8b19-75a002195444" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019fd28a-8bc3-7fca-aaa3-107b7e310daf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019fd28a-44d2-77f9-8f1a-10462a2d1e94" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019fd28a-8bc3-7fca-aaa3-107b7e310daf" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019fd28a-8bc3-7335-9ffc-81586c4ee3b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019fd28a-8bc3-7fca-aaa3-107b7e310daf" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019fd28a-8bc3-7335-9ffc-81586c4ee3b7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019fd28a-8bc3-7548-ae46-a79c5b12242b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019fd28a-8bc3-7335-9ffc-81586c4ee3b7" xlink:to="loc_us-gaap_SubsequentEventMember_019fd28a-8bc3-7548-ae46-a79c5b12242b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationTypeAxis_019fd28b-fa1d-71e3-93d5-8bd5dc1c3fe9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationTypeAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019fd28a-44d2-77f9-8f1a-10462a2d1e94" xlink:to="loc_us-gaap_ReclassificationTypeAxis_019fd28b-fa1d-71e3-93d5-8bd5dc1c3fe9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationTypeDomain_019fd28b-fa1d-7b8f-8cf9-4935e37090a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationTypeAxis_019fd28b-fa1d-71e3-93d5-8bd5dc1c3fe9" xlink:to="loc_us-gaap_ReclassificationTypeDomain_019fd28b-fa1d-7b8f-8cf9-4935e37090a6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOtherMember_019fd28b-fa1d-7684-8cf0-ccacb82cd08a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationOtherMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReclassificationTypeDomain_019fd28b-fa1d-7b8f-8cf9-4935e37090a6" xlink:to="loc_us-gaap_ReclassificationOtherMember_019fd28b-fa1d-7684-8cf0-ccacb82cd08a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_019fd28b-fa1d-7df8-8024-a942cd209f5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019fd28a-44d2-77f9-8f1a-10462a2d1e94" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_019fd28b-fa1d-7df8-8024-a942cd209f5b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019fd28b-fa1d-7594-9a3f-0e99764b6675" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019fd28b-fa1d-7df8-8024-a942cd209f5b" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019fd28b-fa1d-7594-9a3f-0e99764b6675" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019fd28b-fa1d-7d95-b308-56e4e4b82f45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_019fd28b-fa1d-7594-9a3f-0e99764b6675" xlink:to="loc_us-gaap_CommercialPaperMember_019fd28b-fa1d-7d95-b308-56e4e4b82f45" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019fd28b-fa1d-70c1-b4fb-a40b506929b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019fd28a-44d2-77f9-8f1a-10462a2d1e94" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019fd28b-fa1d-70c1-b4fb-a40b506929b4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fd28b-fa1d-72ed-911e-20c639490477" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019fd28b-fa1d-70c1-b4fb-a40b506929b4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fd28b-fa1d-72ed-911e-20c639490477" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019fd28b-fa1d-7e26-8bc1-2f1bd90ae477" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019fd28b-fa1d-72ed-911e-20c639490477" xlink:to="loc_us-gaap_CommercialPaperMember_019fd28b-fa1d-7e26-8bc1-2f1bd90ae477" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ScheduleOfDebtInstrumentsLineItems_019fd28a-44d2-7483-998b-35e304021d51" xlink:href="opc-20260630.xsd#opc_ScheduleOfDebtInstrumentsLineItems"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019fd28a-44d2-77f9-8f1a-10462a2d1e94" xlink:to="loc_opc_ScheduleOfDebtInstrumentsLineItems_019fd28a-44d2-7483-998b-35e304021d51" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_019fd28a-44d2-75a3-a32d-ccc21b1b2733" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsLineItems_019fd28a-44d2-7483-998b-35e304021d51" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_019fd28a-44d2-75a3-a32d-ccc21b1b2733" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019fd28b-fa1d-7b08-b196-a0fa036170e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsLineItems_019fd28a-44d2-7483-998b-35e304021d51" xlink:to="loc_us-gaap_ShortTermBorrowings_019fd28b-fa1d-7b08-b196-a0fa036170e8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019fd28b-fa1d-791d-a49a-9c1ce0d9812c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsLineItems_019fd28a-44d2-7483-998b-35e304021d51" xlink:to="loc_us-gaap_LongTermDebt_019fd28b-fa1d-791d-a49a-9c1ce0d9812c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/DebtCreditFacilitiesDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#DebtCreditFacilitiesDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/DebtCreditFacilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract_019eb289-90e7-7b04-92d8-4c631b57bd49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ScheduleOfDebtInstrumentsTable_019eb289-90e7-7145-abbd-c06ae8a2b967" xlink:href="opc-20260630.xsd#opc_ScheduleOfDebtInstrumentsTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_019eb289-90e7-7b04-92d8-4c631b57bd49" xlink:to="loc_opc_ScheduleOfDebtInstrumentsTable_019eb289-90e7-7145-abbd-c06ae8a2b967" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019eb289-90e7-7dc5-b9c4-efb8ca9a908e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019eb289-90e7-7145-abbd-c06ae8a2b967" xlink:to="loc_us-gaap_CreditFacilityAxis_019eb289-90e7-7dc5-b9c4-efb8ca9a908e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019eb289-90e7-77db-bc22-77f4c6e54b19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_019eb289-90e7-7dc5-b9c4-efb8ca9a908e" xlink:to="loc_us-gaap_CreditFacilityDomain_019eb289-90e7-77db-bc22-77f4c6e54b19" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019eb289-90e7-7f6f-8efa-fbdaffe38f73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_019eb289-90e7-77db-bc22-77f4c6e54b19" xlink:to="loc_us-gaap_LineOfCreditMember_019eb289-90e7-7f6f-8efa-fbdaffe38f73" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019eb289-90e7-761d-81af-f7e147c48b2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_019eb289-90e7-77db-bc22-77f4c6e54b19" xlink:to="loc_us-gaap_LetterOfCreditMember_019eb289-90e7-761d-81af-f7e147c48b2b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019eb289-90e7-79bb-874e-ecd28492c6d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_019eb289-90e7-77db-bc22-77f4c6e54b19" xlink:to="loc_us-gaap_CommercialPaperMember_019eb289-90e7-79bb-874e-ecd28492c6d1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019eb289-90e7-7e46-aba3-a8c274e767a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019eb289-90e7-7145-abbd-c06ae8a2b967" xlink:to="loc_us-gaap_DebtInstrumentAxis_019eb289-90e7-7e46-aba3-a8c274e767a2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eb289-90e7-7533-94f8-489975aa2906" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eb289-90e7-7e46-aba3-a8c274e767a2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eb289-90e7-7533-94f8-489975aa2906" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_CreditAgreementMember_019eb289-90e7-7839-ace3-da53b436f061" xlink:href="opc-20260630.xsd#opc_CreditAgreementMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eb289-90e7-7533-94f8-489975aa2906" xlink:to="loc_opc_CreditAgreementMember_019eb289-90e7-7839-ace3-da53b436f061" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019eb289-90e7-7487-bee3-81902c489c84" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019eb289-90e7-7145-abbd-c06ae8a2b967" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019eb289-90e7-7487-bee3-81902c489c84" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-7722-8cf0-aa076b2d8a6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019eb289-90e7-7487-bee3-81902c489c84" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-7722-8cf0-aa076b2d8a6e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019eb289-90e7-7175-b4b9-61b40248cd26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-7722-8cf0-aa076b2d8a6e" xlink:to="loc_us-gaap_LineOfCreditMember_019eb289-90e7-7175-b4b9-61b40248cd26" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDemandObligationMember_019eb289-90e7-7fea-aaca-a859d0471c31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDemandObligationMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eb289-90e7-7722-8cf0-aa076b2d8a6e" xlink:to="loc_us-gaap_VariableRateDemandObligationMember_019eb289-90e7-7fea-aaca-a859d0471c31" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_ScheduleOfDebtInstrumentsLineItems_019eb289-90e7-71ee-a1cf-ce2fd7f34b60" xlink:href="opc-20260630.xsd#opc_ScheduleOfDebtInstrumentsLineItems"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsTable_019eb289-90e7-7145-abbd-c06ae8a2b967" xlink:to="loc_opc_ScheduleOfDebtInstrumentsLineItems_019eb289-90e7-71ee-a1cf-ce2fd7f34b60" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019eb289-90e7-7512-be9c-0c02308ae741" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsLineItems_019eb289-90e7-71ee-a1cf-ce2fd7f34b60" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019eb289-90e7-7512-be9c-0c02308ae741" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_LineOfCreditFacilityNumberOfFacilities_019eb289-90e7-7bae-8ad8-181eb7bc3df6" xlink:href="opc-20260630.xsd#opc_LineOfCreditFacilityNumberOfFacilities"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsLineItems_019eb289-90e7-71ee-a1cf-ce2fd7f34b60" xlink:to="loc_opc_LineOfCreditFacilityNumberOfFacilities_019eb289-90e7-7bae-8ad8-181eb7bc3df6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_019eb289-90e7-712e-ac16-d70c72896a8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsLineItems_019eb289-90e7-71ee-a1cf-ce2fd7f34b60" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_019eb289-90e7-712e-ac16-d70c72896a8e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019eb289-90e7-7772-a5e8-cc87c90af4ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_opc_ScheduleOfDebtInstrumentsLineItems_019eb289-90e7-71ee-a1cf-ce2fd7f34b60" xlink:to="loc_us-gaap_LineOfCredit_019eb289-90e7-7772-a5e8-cc87c90af4ce" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/SmarrCombinedCycleProjectDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#SmarrCombinedCycleProjectDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/SmarrCombinedCycleProjectDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatedOperationsAbstract_019eb289-90e7-70ed-afb2-85fae2195448" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatedOperationsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019eb289-90e7-70df-ab1b-53dcc55999d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RegulatedOperationsAbstract_019eb289-90e7-70ed-afb2-85fae2195448" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019eb289-90e7-70df-ab1b-53dcc55999d5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-7830-bbee-2172c5143db1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilityAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019eb289-90e7-70df-ab1b-53dcc55999d5" xlink:to="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-7830-bbee-2172c5143db1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-78ac-bcb8-6707433a0c74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilityPlantDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-7830-bbee-2172c5143db1" xlink:to="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-78ac-bcb8-6707433a0c74" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_TwoUnitCombinedCycleGenerationFacilityInMonroeCountyGeorgiaMember_019eb289-90e7-71a0-95d1-d133b767c0e7" xlink:href="opc-20260630.xsd#opc_TwoUnitCombinedCycleGenerationFacilityInMonroeCountyGeorgiaMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-78ac-bcb8-6707433a0c74" xlink:to="loc_opc_TwoUnitCombinedCycleGenerationFacilityInMonroeCountyGeorgiaMember_019eb289-90e7-71a0-95d1-d133b767c0e7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-76fb-9fe5-e3ca07e14a64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresLineItems"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019eb289-90e7-70df-ab1b-53dcc55999d5" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-76fb-9fe5-e3ca07e14a64" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityGeneratingCapacityMegawatts_019eb289-90e7-7a6e-ac89-7da2d9fe75e1" xlink:href="opc-20260630.xsd#opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityGeneratingCapacityMegawatts"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-76fb-9fe5-e3ca07e14a64" xlink:to="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityGeneratingCapacityMegawatts_019eb289-90e7-7a6e-ac89-7da2d9fe75e1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityNumberOfUnits_019eb289-90e7-7a86-8e51-fb0550616d43" xlink:href="opc-20260630.xsd#opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityNumberOfUnits"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-76fb-9fe5-e3ca07e14a64" xlink:to="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityNumberOfUnits_019eb289-90e7-7a86-8e51-fb0550616d43" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityBudget_019eb289-90e7-7c03-8172-e4aa16a25df3" xlink:href="opc-20260630.xsd#opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityBudget"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-76fb-9fe5-e3ca07e14a64" xlink:to="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityBudget_019eb289-90e7-7c03-8172-e4aa16a25df3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityCostsIncurred_019eb289-90e7-78f7-a914-6a6d7f556f4c" xlink:href="opc-20260630.xsd#opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityCostsIncurred"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-76fb-9fe5-e3ca07e14a64" xlink:to="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityCostsIncurred_019eb289-90e7-78f7-a914-6a6d7f556f4c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/TalbotCombustionTurbineUnitNo7Details" xlink:type="simple" xlink:href="opc-20260630.xsd#TalbotCombustionTurbineUnitNo7Details"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/TalbotCombustionTurbineUnitNo7Details" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAndAssetAcquisitionAbstract_019eb289-90e7-7758-b219-61069dd381a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationAndAssetAcquisitionAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019eb289-90e7-7dce-95ba-bdbe322dbc86" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationAndAssetAcquisitionAbstract_019eb289-90e7-7758-b219-61069dd381a9" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019eb289-90e7-7dce-95ba-bdbe322dbc86" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-743d-8f81-853eabcae13d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilityAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019eb289-90e7-7dce-95ba-bdbe322dbc86" xlink:to="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-743d-8f81-853eabcae13d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-71e6-a4b8-0e5d8e1b4d7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilityPlantDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilityAxis_019eb289-90e7-743d-8f81-853eabcae13d" xlink:to="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-71e6-a4b8-0e5d8e1b4d7c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_CombinedTurbineUnitFacilityInTalbotCountyGeorgiaMember_019eb289-90e7-7f4a-95c0-1675b3be37f7" xlink:href="opc-20260630.xsd#opc_CombinedTurbineUnitFacilityInTalbotCountyGeorgiaMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_UtilityPlantDomain_019eb289-90e7-71e6-a4b8-0e5d8e1b4d7c" xlink:to="loc_opc_CombinedTurbineUnitFacilityInTalbotCountyGeorgiaMember_019eb289-90e7-7f4a-95c0-1675b3be37f7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-7f2f-8692-947861cdb028" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresLineItems"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019eb289-90e7-7dce-95ba-bdbe322dbc86" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-7f2f-8692-947861cdb028" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityGeneratingCapacityMegawatts_019eb289-90e7-7737-ba8b-b22d3e8b7e44" xlink:href="opc-20260630.xsd#opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityGeneratingCapacityMegawatts"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-7f2f-8692-947861cdb028" xlink:to="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityGeneratingCapacityMegawatts_019eb289-90e7-7737-ba8b-b22d3e8b7e44" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityBudget_019eb289-90e7-7975-9a77-b529dce19fc1" xlink:href="opc-20260630.xsd#opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityBudget"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-7f2f-8692-947861cdb028" xlink:to="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityBudget_019eb289-90e7-7975-9a77-b529dce19fc1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityCostsIncurred_019eb289-90e7-76a8-8ad4-0818c9750c03" xlink:href="opc-20260630.xsd#opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityCostsIncurred"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019eb289-90e7-7f2f-8692-947861cdb028" xlink:to="loc_opc_PublicUtilitiesDevelopmentAndConstructionOfGenerationFacilityCostsIncurred_019eb289-90e7-76a8-8ad4-0818c9750c03" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://www.opc.com/role/ReportableSegmentInformationDetails" xlink:type="simple" xlink:href="opc-20260630.xsd#ReportableSegmentInformationDetails"/>
  <link:presentationLink xlink:role="http://www.opc.com/role/ReportableSegmentInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingAbstract_019eb289-90e7-7d34-9a16-804ca9d38ee6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019eb289-90e7-7657-bcb5-6cdba4916c95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_019eb289-90e7-7d34-9a16-804ca9d38ee6" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019eb289-90e7-7657-bcb5-6cdba4916c95" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019eb289-90e7-7f39-b7a0-6e870e475eb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_019eb289-90e7-7d34-9a16-804ca9d38ee6" xlink:to="loc_us-gaap_NumberOfReportableSegments_019eb289-90e7-7f39-b7a0-6e870e475eb8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NumberOfElectricDistributionCooperativeMembers_019eb289-90e7-7d3b-a9ee-7a2bc73a0afd" xlink:href="opc-20260630.xsd#opc_NumberOfElectricDistributionCooperativeMembers"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_019eb289-90e7-7d34-9a16-804ca9d38ee6" xlink:to="loc_opc_NumberOfElectricDistributionCooperativeMembers_019eb289-90e7-7d3b-a9ee-7a2bc73a0afd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_opc_NumberOfServicesProvided_019eb289-90e7-7232-a6d3-7d515511c561" xlink:href="opc-20260630.xsd#opc_NumberOfServicesProvided"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_019eb289-90e7-7d34-9a16-804ca9d38ee6" xlink:to="loc_opc_NumberOfServicesProvided_019eb289-90e7-7232-a6d3-7d515511c561" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#AwardTimingDisclosure"/>
  <link:presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgDiscLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgDiscLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMnpiDiscTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgMnpiDiscTextBlock"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardTmgMnpiDiscTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMethodTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgMethodTextBlock"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardTmgMethodTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgPredtrmndFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgPredtrmndFlag"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardTmgPredtrmndFlag" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMnpiCnsdrdFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgMnpiCnsdrdFlag"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardTmgMnpiCnsdrdFlag" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardTmgHowMnpiCnsdrdTextBlock"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MnpiDiscTimedForCompValFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_MnpiDiscTimedForCompValFlag"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_MnpiDiscTimedForCompValFlag" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardsCloseToMnpiDiscTableTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardsCloseToMnpiDiscTableTextBlock"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardsCloseToMnpiDiscTableTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardsCloseToMnpiDiscTable" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardsCloseToMnpiDiscTable"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardsCloseToMnpiDiscTable" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_IndividualAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_IndividualAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardsCloseToMnpiDiscTable" xlink:to="loc_ecd_IndividualAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllIndividualsMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_IndividualAxis" xlink:to="loc_ecd_AllIndividualsMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardsCloseToMnpiDiscTable" xlink:to="loc_us-gaap_AwardTypeAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="loc_us-gaap_EmployeeStockOptionMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockAppreciationRightsSARSMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="loc_us-gaap_StockAppreciationRightsSARSMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardsCloseToMnpiDiscIndName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardsCloseToMnpiDiscIndName"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardsCloseToMnpiDiscIndName" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardUndrlygSecuritiesAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardUndrlygSecuritiesAmt"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardUndrlygSecuritiesAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardExrcPrice" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardExrcPrice"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardExrcPrice" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardGrantDateFairValue" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AwardGrantDateFairValue"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_AwardGrantDateFairValue" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_UndrlygSecurityMktPriceChngPct" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_UndrlygSecurityMktPriceChngPct"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="loc_ecd_UndrlygSecurityMktPriceChngPct" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ErrCompDisclosure"/>
  <link:presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_RecoveryOfErrCompDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ErrCompRecoveryTable" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ErrCompRecoveryTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_ErrCompRecoveryTable" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RestatementDateAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_RestatementDateAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_ErrCompRecoveryTable" xlink:to="loc_ecd_RestatementDateAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_IndividualAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_IndividualAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_ErrCompRecoveryTable" xlink:to="loc_ecd_IndividualAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllIndividualsMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_IndividualAxis" xlink:to="loc_ecd_AllIndividualsMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonNeosMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonNeosMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_ecd_NonNeosMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RestatementDeterminationDate" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_RestatementDeterminationDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_RestatementDeterminationDate" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtErrCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AggtErrCompAmt"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_AggtErrCompAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ErrCompAnalysisTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ErrCompAnalysisTextBlock"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_ErrCompAnalysisTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_StkPrcOrTsrEstimationMethodTextBlock"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingAggtErrCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_OutstandingAggtErrCompAmt"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_OutstandingAggtErrCompAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AggtErrCompNotYetDeterminedTextBlock"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryIndName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ForgoneRecoveryIndName"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_ForgoneRecoveryIndName" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingRecoveryIndName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_OutstandingRecoveryIndName"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_OutstandingRecoveryIndName" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingRecoveryCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_OutstandingRecoveryCompAmt"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_OutstandingRecoveryCompAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_RestatementDoesNotRequireRecoveryTextBlock"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="loc_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/PvpDisclosure" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#PvpDisclosure"/>
  <link:presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/PvpDisclosure" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PayVsPerformanceDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PvpTable" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PvpTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_PvpTable" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ExecutiveCategoryAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ExecutiveCategoryAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PvpTable" xlink:to="loc_ecd_ExecutiveCategoryAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllExecutiveCategoriesMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllExecutiveCategoriesMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_ExecutiveCategoryAxis" xlink:to="loc_ecd_AllExecutiveCategoriesMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeoMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllExecutiveCategoriesMember" xlink:to="loc_ecd_PeoMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonPeoNeoMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllExecutiveCategoriesMember" xlink:to="loc_ecd_NonPeoNeoMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_IndividualAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_IndividualAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PvpTable" xlink:to="loc_ecd_IndividualAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllIndividualsMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_IndividualAxis" xlink:to="loc_ecd_AllIndividualsMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToCompAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AdjToCompAxis"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PvpTable" xlink:to="loc_ecd_AdjToCompAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllAdjToCompMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllAdjToCompMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AdjToCompAxis" xlink:to="loc_ecd_AllAdjToCompMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtPnsnAdjsSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AggtPnsnAdjsSvcCstMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_ecd_AggtPnsnAdjsSvcCstMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PnsnAdjsSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PnsnAdjsSvcCstMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AggtPnsnAdjsSvcCstMember" xlink:to="loc_ecd_PnsnAdjsSvcCstMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PnsnAdjsPrrSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PnsnAdjsPrrSvcCstMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AggtPnsnAdjsSvcCstMember" xlink:to="loc_ecd_PnsnAdjsPrrSvcCstMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EqtyAwrdsAdjsMember"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_ecd_EqtyAwrdsAdjsMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_EqtyAwrdsAdjsMember" xlink:to="loc_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_EqtyAwrdsAdjsMember" xlink:to="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:to="loc_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:to="loc_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:to="loc_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:to="loc_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:to="loc_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:to="loc_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MeasureAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_MeasureAxis"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PvpTable" xlink:to="loc_ecd_MeasureAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PvpTableTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PvpTableTextBlock"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_PvpTableTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CoSelectedMeasureName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CoSelectedMeasureName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_CoSelectedMeasureName" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NamedExecutiveOfficersFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NamedExecutiveOfficersFnTextBlock"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_NamedExecutiveOfficersFnTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeerGroupIssuersFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeerGroupIssuersFnTextBlock"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_PeerGroupIssuersFnTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChangedPeerGroupFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_ChangedPeerGroupFnTextBlock"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_ChangedPeerGroupFnTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoTotalCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeoTotalCompAmt"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_PeoTotalCompAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoActuallyPaidCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeoActuallyPaidCompAmt"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_PeoActuallyPaidCompAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToPeoCompFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AdjToPeoCompFnTextBlock"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_AdjToPeoCompFnTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoAvgTotalCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonPeoNeoAvgTotalCompAmt"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_NonPeoNeoAvgTotalCompAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonPeoNeoAvgCompActuallyPaidAmt"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AdjToNonPeoNeoCompFnTextBlock"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EquityValuationAssumptionDifferenceFnTextBlock"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CompActuallyPaidVsNetIncomeTextBlock"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TotalShareholderRtnVsPeerGroupTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TotalShareholderRtnVsPeerGroupTextBlock"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_TotalShareholderRtnVsPeerGroupTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsOtherMeasureTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CompActuallyPaidVsOtherMeasureTextBlock"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_CompActuallyPaidVsOtherMeasureTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TabularListTableTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TabularListTableTextBlock"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_TabularListTableTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TotalShareholderRtnAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TotalShareholderRtnAmt"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_TotalShareholderRtnAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeerGroupTotalShareholderRtnAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeerGroupTotalShareholderRtnAmt"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_PeerGroupTotalShareholderRtnAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CoSelectedMeasureAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_CoSelectedMeasureAmt"/>
    <link:presentationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_CoSelectedMeasureAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OtherPerfMeasureAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_OtherPerfMeasureAmt"/>
    <link:presentationArc order="24" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_OtherPerfMeasureAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AdjToCompAmt"/>
    <link:presentationArc order="25" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_AdjToCompAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PeoName"/>
    <link:presentationArc order="26" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_PeoName" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MeasureName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_MeasureName"/>
    <link:presentationArc order="27" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_MeasureName" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonGaapMeasureDescriptionTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonGaapMeasureDescriptionTextBlock"/>
    <link:presentationArc order="28" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_NonGaapMeasureDescriptionTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_Additional402vDisclosureTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_Additional402vDisclosureTextBlock"/>
    <link:presentationArc order="29" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_Additional402vDisclosureTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PnsnBnftsAdjFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_PnsnBnftsAdjFnTextBlock"/>
    <link:presentationArc order="30" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_PnsnBnftsAdjFnTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_EqtyAwrdsAdjFnTextBlock"/>
    <link:presentationArc order="31" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_ecd_EqtyAwrdsAdjFnTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#InsiderTradingArrangements"/>
  <link:presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTradingArrLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_InsiderTradingArrLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TradingArrByIndTable" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TradingArrByIndTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_TradingArrByIndTable" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TradingArrAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TradingArrAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_TradingArrByIndTable" xlink:to="loc_ecd_TradingArrAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllTradingArrangementsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllTradingArrangementsMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_TradingArrAxis" xlink:to="loc_ecd_AllTradingArrangementsMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_IndividualAxis" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_IndividualAxis"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_TradingArrByIndTable" xlink:to="loc_ecd_IndividualAxis" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllIndividualsMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_IndividualAxis" xlink:to="loc_ecd_AllIndividualsMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MtrlTermsOfTrdArrTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_MtrlTermsOfTrdArrTextBlock"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_MtrlTermsOfTrdArrTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrIndName" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrIndName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_TrdArrIndName" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrIndTitle" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrIndTitle"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_TrdArrIndTitle" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_Rule10b51ArrAdoptedFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_Rule10b51ArrAdoptedFlag"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_Rule10b51ArrAdoptedFlag" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonRule10b51ArrAdoptedFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonRule10b51ArrAdoptedFlag"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_NonRule10b51ArrAdoptedFlag" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrAdoptionDate" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrAdoptionDate"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_TrdArrAdoptionDate" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_Rule10b51ArrTrmntdFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_Rule10b51ArrTrmntdFlag"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_Rule10b51ArrTrmntdFlag" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonRule10b51ArrTrmntdFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_NonRule10b51ArrTrmntdFlag"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_NonRule10b51ArrTrmntdFlag" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrTerminationDate" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrTerminationDate"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_TrdArrTerminationDate" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrExpirationDate" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrExpirationDate"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_TrdArrExpirationDate" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrDuration" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrDuration"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_TrdArrDuration" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrSecuritiesAggAvailAmt" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_TrdArrSecuritiesAggAvailAmt"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingArrLineItems" xlink:to="loc_ecd_TrdArrSecuritiesAggAvailAmt" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#InsiderTradingPoliciesProc"/>
  <link:presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTradingPoliciesProcLineItems" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_InsiderTradingPoliciesProcLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_InsiderTrdPoliciesProcAdoptedFlag"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingPoliciesProcLineItems" xlink:to="loc_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_InsiderTradingPoliciesProcLineItems" xlink:to="loc_ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
