secwatch.observer — SEC 8-K summary
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Issuer:     Otter Tail Corp (OTTR)
CIK:        0001466593
Form:       8-K
Filed at:   2026-05-15T17:57:25+00:00
Accession:  0001466593-26-000054
Event type: regulatory
Sentiment:  neutral
Materiality: 0.65
Item codes: 8.01
LLM model:  deepseek-v4-flash:cloud@v2

Otter Tail files 2026 IRP with MN PUC; plans 50MW gas, 100MW wind, solar, battery
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- Filed 2026 Integrated Resource Plan with Minnesota PUC; includes a 50MW natural gas plant expected in 2031 or 2032.
- Two 50MW wind generation facilities planned for 2035 and 2040.
- Ongoing projects: 50MW Solway Solar (2026), 295MW Abercrombie Solar (2028), 75MW battery storage.
- Coyote Station coal plant to be designated AME starting June 1, 2026; to stop serving MN customers by Dec 31, 2031.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1466593/000146659326000054/0001466593-26-000054-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1466593/000146659326000054/ottr-20260515.htm
  HTML page:      https://secwatch.observer/filing/0001466593-26-000054

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer