Work starts on plant to treat mine wastewater in Belt Creek

This March 7, 2016, file photo, provided by the Montana Department of Environmental Quality shows pollution in Belt Creek near the town of Belt in central Montana. Work began in early October on a $26 million project to treat acid mine drainage from an old coal mine that is polluting the creek, sometimes causing it to turn a rusty color. (Tom Henderson/Montana Department of Environmental Quality via AP)