From The Crested Butte News (Mark Reaman):
U.S. Energy was sent a “Compliance Advisory Letter” at the end of December by the division. The letter advised the company of “possible violations of the Colorado Water Quality Control Act, its implementing regulations and permits, so that it may take appropriate steps to avoid or mitigate formal enforcement action.” U.S. Energy is the primary mining patent holder for the Mt. Emmons project, a proposed mine that would extract molybdenum from Mt. Emmons. Water quality sampling between 2008 and 2010 has shown that the water from the mine property exceeds water quality standards for Coal Creek, according to Dave Akers with the water Quality Control Division.
More Mt. Emmons mine coverage here.