Colstrip operator says it’s challenging Montana’s cleanup plan

Talen Energy, part owner and operator of the Colstip Power Plants in southeastern Montana, says the state’s $285 million cleanup plan for coal ash ponds at Colstrip is “grossly excessive,” and the company will challenge that decision.

At issue is the fate of the settling ponds that contain 6.7 million cubic yards of toxic coal ash associated with Colstrip’s two oldest units, 1 & 2, which were retired in 2019.

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