Public Service Comission

Montana's main utility has released a draft plan to supply energy to its customers for the next 20 years, and environmental advocates have concerns.

In the latest step of a long pre approval process, the commission that regulates electric utilities in Montana wants to know how big a share NorthWestern Energy intends to purchase in the Colstrip coal fired power plant.

Montana’s largest utility provider announced Wednesday it is looking for small-scale renewable energy projects that it’s required by law to buy. But...