From the Associated Press via The Durango Herald:
The Colorado Division of Reclamation Mining and Safety said Thursday it doesn’t believe the plan would prevent uranium from contaminating Ralston Reservoir, which supplies some of the Denver area’s drinking water. Loretta Pineda, the agency’s director said Cotter has been directed to resume treating the water and submit a new plan within two weeks.
From The Denver Post:
The state Division of Reclamation Mining and Safety rejected the protection plan Cotter submitted last month and instructed the Denver-based company to submit a water-treatment plan within two weeks, the agency said in a news release…Cotter had proposed a man-made wetland and a chemical filter to capture uranium leaking from the mine.