Signal Peak mine

Bull Mountain Land Alliance and Northern Plains Resource Council accuse the state of violating the Constitution by changing coal mine permits without public input. In their lawsuit, they point to more than 300 changes made to the permit for the Bull Mountains Mine in south central Montana since the early 2000s.

Canada's plan to ban coal exports could hurt mines in Montana.

Coal-impacted counties say they are desperate for funds to fix roads, water systems, and to pay for schools, but the grant source for those projects is…