March 31, 2023

Cost and reliability drive our 15-year resource plan

Today we submitted our updated 2022-2036 Application for Integrated Resource Plan (IRP) with regulatory commissions in each of the three states we serve: Minnesota, North Dakota, and South Dakota.

In September 2021 we submitted our initial IRP filing. “Since that time, mounting changes have presented a markedly different planning landscape than the one our initial filing addressed,” said Vice President of Energy Supply Brad Tollerson. “Based on those factors, we’ve updated the preferred plan set forth in our initial filing.”

Updated preferred plan

The updated preferred plan provides specific actions we intend to complete in the next five years, which include:

  • Adding on-site liquified natural gas (LNG) fuel storage at Astoria Station in 2026.
  • Adding approximately 200 megawatts (MW) of solar generation in the 2027-2028 timeframe.
  • Taking the initial steps necessary to add approximately 200 MW of wind generation in the 2029 timeframe.
  • Withdrawing from our 35% ownership interest in Coyote Station if we're required to make a large, non-routine capital investment in the plant.

We also intend to repower four of our existing wind farms as part of our IRP baseline model.

How initial and updated plans compare

“Our updated preferred plan adds more renewable generation resources to our portfolio than our prior plan,” said Tollerson. “With respect to Coyote Station, our analysis still supports withdrawal from our ownership interest if we are required to make a large, non-routine capital investment to operate the plant or comply with regulatory mandates. That was the case in our initial preferred plan and remains the case with today’s update. Where our Coyote Station analysis differs from our initial filing is that the mix of uncertainties and risks our customers face in the current planning environment supports retention of Coyote Station in our generation portfolio if we’re not required to make a major capital investment in the plant.”

President Tim Rogelstad adds, “As a winter peaking utility, we are particularly concerned about the Midcontinent Independent System Operator’s (MISO’s) new minimum capacity planning requirements, open questions concerning MISO accreditation methodologies, and projected capacity deficits within MISO. We believe it’s in the public interest to retain Coyote Station’s existing dispatchable capacity in our generation portfolio pending greater visibility into any non-routine capital investments that may be required to continue operating the plant.” This position will be subject to evaluation in our next IRP filings.

Meeting customers’ needs; complying with laws and regulations

“Our updated preferred plan ensures we have the resources necessary to continue providing reliable, low-cost electricity to meet our customers’ needs,” said Rogelstad. “The plan preserves flexibility to respond to risks in a changing planning environment; complies with the requirements of applicable statutes and rules, including the Minnesota Clean Energy Law; utilizes Inflation Reduction Act incentives to lower renewable energy generation costs; and accounts for differing energy policies in each of the three states we serve while preserving the customer benefits of system-wide planning and networked assets for a small utility.”

Next steps

The Minnesota Public Utilities Commission (MPUC) procedural schedule allows intervenors four months to analyze our updated plan and provide feedback to the MPUC. We then have two months to respond to intervenors’ comments. We anticipate an MPUC hearing toward the end of 2023. The North Dakota Public Service Commission (ND PSC) has hired a consultant to review the modeling and determine whether our preferred plan is reasonable. We anticipate receiving ND PSC comments on the consultant’s report by this fall. The South Dakota Public Utilities Commission (SD PUC) doesn’t have formal IRP requirements or proceedings, but we've filed our IRP with the SD PUC because it is a vital stakeholder.

“As we’ve done since starting our resource planning process, we’ll continue to monitor the changing landscape,” said Rogelstad.