COLSTRIP, Mont. – On Montana’s eastern plains, there’s a town that was built to burn coal and produce electricity for the Northwest’s largest cities. Smokestacks loom over Colstrip, a company town with 2,300 people, a coal mine and a coal-fired generating plant. The plant produces enough electricity to power 1.6 million households, energy that’s consumed hundreds of miles away in Spokane, the Puget Sound region and even Portland.