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  <xs:element id="smc_DamagesPayableToFederalCriminalOverFiveYearsMember" abstract="true" name="DamagesPayableToFederalCriminalOverFiveYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smc_EnvironmentalLossContingenciesPenaltiesAndFinesPaymentPeriod" abstract="false" name="EnvironmentalLossContingenciesPenaltiesAndFinesPaymentPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="smc_AccrualForEnvironmentalLossContingenciesExpectedPayment" abstract="false" name="AccrualForEnvironmentalLossContingenciesExpectedPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smc_TallOakParentMember" abstract="true" name="TallOakParentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smc_StockIssuedDuringPeriodSharesRelatedParty" abstract="false" name="StockIssuedDuringPeriodSharesRelatedParty" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smc_PartnersCapitalTable" abstract="true" name="PartnersCapitalTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="smc_SummitMidstreamPartnersLPMember" abstract="true" name="SummitMidstreamPartnersLPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smc_PartnersCapitalLineItems" abstract="true" name="PartnersCapitalLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="smc_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare" abstract="false" name="BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smc_AccruedAndUnpaidDistributions" abstract="false" name="AccruedAndUnpaidDistributions" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smc_LimitedPartnerCommonUnitsMember" abstract="true" name="LimitedPartnerCommonUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smc_SeriesAPreferredUnitsMember" abstract="true" name="SeriesAPreferredUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smc_PartnersCapitalIssuanceCosts" abstract="false" name="PartnersCapitalIssuanceCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smc_CommonUnitsMember" abstract="true" name="CommonUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smc_IncrementalCommonSharesAttributableToDilutiveEffectOfConversionAndEliminationOfNoncontrollingInterestNetIncome" abstract="false" name="IncrementalCommonSharesAttributableToDilutiveEffectOfConversionAndEliminationOfNoncontrollingInterestNetIncome" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smc_EarningsPerShareBasicAndDilutedEPSAbstract" abstract="true" name="EarningsPerShareBasicAndDilutedEPSAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="smc_PhantomShareUnitsAndAssociatedDistributionEquivalentRightsMember" abstract="true" name="PhantomShareUnitsAndAssociatedDistributionEquivalentRightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smc_LongTermIncentivePlanMember" abstract="true" name="LongTermIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smc_SMCLongTermIncentivePlanMember" abstract="true" name="SMCLongTermIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smc_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smc_NumberOfDirectors" abstract="false" name="NumberOfDirectors" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smc_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedAwardAssumedPayoutPercentage" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedAwardAssumedPayoutPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="smc_NumberOfReportableSegmentsNotDisclosedFlag" abstract="false" name="NumberOfReportableSegmentsNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="smc_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" abstract="false" name="AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smc_ReconciliationOfNetIncomeToEBITDAAdditionsAbstract" abstract="true" name="ReconciliationOfNetIncomeToEBITDAAdditionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="smc_CorporateAndOtherExpenses" abstract="false" name="CorporateAndOtherExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smc_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortizationProportionalEquityMethodInvestmentAdjustment" abstract="false" name="AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortizationProportionalEquityMethodInvestmentAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smc_AdjustmentsRelatedToCapitalReimbursementActivity" abstract="false" name="AdjustmentsRelatedToCapitalReimbursementActivity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smc_TransactionCostsAndOtherExpenses" abstract="false" name="TransactionCostsAndOtherExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smc_JamesD.JohnstonMember" abstract="true" name="JamesD.JohnstonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
