Wyoming scrutinizes Pacificorp coal retirement plans in 'unheard of' IRP investigation

Utility Dive: Pacificorp in October announced plans to add nearly 7,000 MW of renewable energy and storage capacity by 2025, as well as shut down 20 of its 24 coal units by 2038. The utility operates in six states — Oregon, California, Washington, Idaho, Utah and Wyoming — and on Oct. 18 filed with individual state regulators for approval of its 20-year integrated resource plan (IRP).

Wyoming regulators on Nov. 13 issued an order initiating an investigation of subsidiary Rocky Mountain Power's IRP, a step that is "very different" from previous proceedings, Shannon Anderson, staff attorney at Powder River Basin Resource Council, who testified in support of RMP's plan, told Utility Dive in an email.

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