South Dakota

Wyoming 2026 IRP submitted to the Wyoming PSC on June 30, 2026; company plans follow-on resource applications in H2 2026 or H1 2027. Colorado 2026 ERP/Clean Energy Plan filed September 11, 2026 as a pending PUC proceeding (docket 26A-0263EG); commissioners asked for supplemental testimony and an ALJ review of PPA and affiliate questions. No final decision found in sources.

NEXT: Wyoming: file applications to construct new resources with the Wyoming PSC (expected H2 2026 or H1 2027). Colorado: supplemental testimony and ALJ review, then Commission decision (no dates found).

CHECKED Nov 4, 2026blackhillsenergy.comwyomingnews.comblackhillsenergy.com

Filed late April 2026 (sources give Apr 27, Apr 28, or May 4). Public comment closed Jul 28, 2026. On Aug 18, 2026 the Montana PSC voted 3-1 to return the plan for five minimum-filing deficiencies, with a 30-day cure period (to about Sept 18) that could be extended. I found no source reporting a refiled plan or an extension as of Nov 4, 2026.

NEXT: NorthWestern's corrected 2026 IRP was due about Sept 18, 2026 (30 days after the Aug 18 PSC action) unless an extension was requested. No refiling or extension was found in sources.

CHECKED Nov 4, 2026

Filed with the Minnesota PUC Feb 1, 2024; settlement reached Oct 2024; PUC approved the settlement, with modifications, on Feb 20, 2025. Subsequent steps include a 2025 approval of gas/battery-related items and an April 2, 2026 PUC approval of the 200 MW Capacity*Connect battery program. A 4,100 MW renewable and storage RFP recommendation filing was expected in the months after late Oct 2026. No date found for the next IRP filing.

CHECKED Nov 4, 2026