The U.S. Department of the Interior should do all it can to keep open the Colowyo coal mine in northwest Colorado, U.S. Rep. Scott Tipton and Sen. Cory Gardner, both Colorado Republicans, said in a letter to Interior Secretary Sally Jewell. ... Colowyo Mine employs 220 people in Moffat and Rio Blanco counties and has a payroll of about $20 million, Tipton wrote to Jewell, asking that Interior react quickly to a federal court ruling that could force closure of the mine. “The adverse effects of shutting down this mine go beyond the jobs at the mine that would be...