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Get filing alertsOtter Tail Power files 15-year plan to exit coal by 2031, add 345MW solar and 100MW wind
Filed May 15, 2026 · Period ending May 15, 2026 · ~1 min read
Key Changes
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Company will stop serving Minnesota customers with coal power from Coyote Station by December 31, 2031, transitioning the plant to emergency-only status starting June 1, 2026. This marks a complete exit from coal generation for Minnesota operations.
Item 8.01: IRP Filing verify on EDGAR → -
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Near-term renewable buildout includes 50MW Solway Solar (2026), 295MW Abercrombie Solar (2028), 75MW battery storage, and additional wind facilities—representing major capital deployment already approved and underway.
Item 8.01: IRP Filing verify on EDGAR → -
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Long-term plan adds 100MW of wind capacity split between 2035 (50MW) and 2040 (50MW), plus a 50MW natural gas plant by 2031-2032 to replace retiring coal capacity and meet growing demand.
Item 8.01: IRP Filing verify on EDGAR → -
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The 2026 Integrated Resource Plan filed with Minnesota regulators outlines how Otter Tail Power will meet customer electricity needs through 2041, setting the framework for capital allocation over the next 15 years.
Item 8.01: IRP Filing verify on EDGAR →
Summary
Otter Tail Power submitted its 2026 Integrated Resource Plan to Minnesota regulators, charting a decisive shift away from coal toward renewable energy over the next 15 years. The utility will completely exit coal generation for Minnesota customers by end of 2031, transitioning its share of the Coyote Station coal plant to emergency-only status starting this June.
To replace that capacity, the company is deploying 345 megawatts of solar (2026 and 2028), 75 megawatts of battery storage, 100 megawatts of wind (2035 and 2040), and a 50-megawatt natural gas plant by 2032. Retail investors should recognize this represents a multi-year capital expenditure program that will reshape the company's generation mix and likely impact rate base growth.
The renewable investments align with regulatory and environmental trends, but the coal exit timeline and replacement capacity costs could affect near-term earnings. The inclusion of a new gas plant may draw regulatory scrutiny given climate concerns. Watch for Minnesota Public Utilities Commission approval of the plan and any modifications regulators require. Also monitor whether the company provides updated capital expenditure guidance and rate case filings to recover these investments.
Section-by-Section Diff
Event · Item 8.01 — Other Events
Otter Tail Power filed 2026 Integrated Resource Plan proposing 50MW gas plant by 2032, two 50MW wind facilities by 2035/2040, and coal plant exit by 2031.
Added in current filing · verify on EDGAR →
On May 15, 2026, Otter Tail Power Company (OTP), a wholly owned subsidiary of Otter Tail Corporation, filed its 2026 Integrated Resource Plan (2026 IRP) with the Minnesota Public Utilities Commission (MPUC). The 2026 IRP includes OTP’s preferred plan for meeting customers’ anticipated capacity and energy needs over the next 15 years.
Otter Tail Power submitted its 15-year resource plan to Minnesota regulators outlining how it will meet customer electricity demand through 2041. This filing is a regulatory requirement that sets the framework for major capital investments and generation mix decisions.
Added in current filing · verify on EDGAR →
–the addition of a 50-megawatt natural gas plant, expected to be placed into service in 2031 or 2032;
The company plans to add 50 megawatts of natural gas generation capacity in the early 2030s. This represents a capital investment in fossil fuel infrastructure that will require regulatory approval and could face scrutiny given environmental considerations.
Added in current filing · verify on EDGAR →
–the addition of a 50-megawatt wind generation facility, expected to be placed in service in 2035; and
–the addition of a 50-megawatt wind generation facility, expected to be placed in service in 2040.
The plan includes 100 megawatts of new wind capacity split between 2035 and 2040. These renewable additions align with decarbonization trends and will require significant capital expenditure over the next 15 years.
Added in current filing · verify on EDGAR →
Additionally, consistent with OTP’s previously approved resource plan, OTP is prepared to designate the Minnesota share of the jointly-owned Coyote Station coal-fired plant as an Available Maximum Emergency (AME) resource beginning June 1, 2026, and to no longer serve Minnesota customers with capacity or energy from Coyote Station as soon as feasible, but no later than December 31, 2031.
Otter Tail Power will transition its Minnesota share of the Coyote Station coal plant to emergency-only status starting June 1, 2026, and fully exit coal generation for Minnesota customers by end of 2031. This represents a major shift away from coal that will require replacement capacity and could involve asset retirement costs.
Added in current filing · verify on EDGAR →
–our 50-megwatt Solway Solar project, which is expected to be placed into service in 2026;
–our 295-megwatt Abercrombie Solar project, which is expected to be placed into service in 2028;
–a 75-megawatt battery storage facility; and
–additional wind generation facilities.
The plan confirms previously approved projects totaling 345 megawatts of solar capacity (2026 and 2028) plus 75 megawatts of battery storage and additional wind facilities. These near-term investments represent substantial capital deployment in renewable infrastructure already underway.
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Figures/quotes linked to EDGAR · Narrative written by AI · Jun 1, 2026 · How we verify