0001130464 2026-05-15 2026-05-15 0001130464 1 2026-05-15 2026-05-15 0001130464 2 2026-05-15 2026-05-15 0001130464 3 2026-05-15 2026-05-15 0001130464 4 2026-05-15 2026-05-15 0001130464 5 2026-05-15 2026-05-15 0001130464 6 2026-05-15 2026-05-15 0001130464 7 2026-05-15 2026-05-15 0001130464 8 2026-05-15 2026-05-15 iso4217:USD pure S-3 S-3ASR EX-FILING FEES 0001130464 BLACK HILLS CORP /SD/ N/A N/A S-3 BLACK HILLS CORP /SD/ false Debt Debt Securities true 0.0001381 false Equity Preferred Stock true 0.0001381 false Equity Depositary Shares true 0.0001381 false Equity Common stock, par value $1.00 true 0.0001381 false Other Warrants true 0.0001381 false Other Purchase Contracts true 0.0001381 false Other Units true 0.0001381 Equity Common stock, par value $1.00 true 183376179.78 S-3 333-272739 2023-06-16 25324.25 183376179.78 0.00 0.00 0.00 0.00 Note 1a. An indeterminate aggregate initial offering price or number of securities of each identified class is being registered as may from time to time be offered at indeterminate prices. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities. In accordance with Rules 456(b) and 457(r) under the Securities Act of 1933, the Registrant is deferring payment of the registration fees. Note 1b. The Debt Securities to be offered hereunder will consist of one or more series of Senior Debt Securities, Subordinated Debt Securities, Junior Subordinated Debt Securities, or any combination thereof. See Note 1a. See Note 1a. See Note 1a. See Note 1a. See Note 1a. See Note 1a. Any securities registered hereunder may be sold separately or as units with other securities registered hereunder. Pursuant to Rule 415(a)(6) under the Securities Act of 1933, this Registration Statement includes unsold securities originally registered under the Registrant's Registration Statement on Form S-3 filed with the Securities and Exchange Commission on June 16, 2023 (Registration No. 333-272739), as follows: an aggregate amount of $183,376,179.78 of common stock issuable under the registrant's at-the-market equity offering program.