Apr 29, 2010 8:18 AM by Bea Karnes, News First 5

State reviewing plan for closed Colorado uranium mine

State regulators are reviewing a plan by Cotter Corp. to address high levels of uranium in groundwater at its closed mine near Golden.

Cotter's Schwartzwalder mine is on Ralston Creek above Denver Water's Ralston Reservoir in Jefferson County. The reservoir is a drinking water supply for Denver Water, the city of Arvada and the North Table Mountain Water and Sanitation District.

The Colorado Division of Mining, Reclamation and Safety say it's concerned about the rising uranium levels and radioactive contaminants in sediment along Ralston Creek. But state officials say the levels are well below acceptable drinking water standards and they are closely monitoring the situation.

Cotter's cleanup plan includes water monitoring and creation of a wetland to trap the uranium


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