Otter Tail subsidiary updates IRP; cites FERC, MISO changes; dual fuel project details revised.

Otter Tail Corp

Otter Tail Power filed supplemental IRP update with Minnesota PUC on Oct 14, 2022, requesting procedural schedule amendment.
Cites FERC-approved MISO seasonal resource adequacy construct and Inflation Reduction Act as factors requiring revised modeling.
Updated modeling results and IRP revisions expected by March 31, 2023.
Dual fuel capability at Astoria Station remains on track for 2026; secondary fuel source may shift from fuel oil to LNG.
Filed similar letters with North Dakota and South Dakota public utility commissions.

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