Otter Tail Corporation

05/15/2026 | Press release | Distributed by Public on 05/15/2026 11:57

Material Event (Form 8-K)

Item 8.01 Other Events
Integrated Resource Plan
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.
The major requests in OTP's preferred plan include:
-the addition of a 50-megawatt natural gas plant, expected to be placed into service in 2031 or 2032;
-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 2026 IRP also reflects projects currently in development or under construction following OTP's previously approved resource plan, which include:
-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.
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 Corporation published this content on May 15, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on May 15, 2026 at 17:58 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]