The DALC Project
Dewatering of Nelson Tunnel, Amethyst Mine & Last Chance Mine
December 2006 - June 2011
The Nelson Tunnel Pilot Dewatering and Amethyst, Last Chance Waste Pile Best Management Practices (DALC Project) was a complex project with a multitude of tasks. The Colorado Division of Reclamation, Mining and Safety (CDRMS) performed the dewatering pilot in 2007 and gained a better understanding of the hydrogeology within the mine complex, the water chemistry, and source of water. WCRC implemented BMPs for the Amethyst and Last Chance waste rock piles to reduce run-off, and build retaining walls to limit direct contact with West Willow Creek.
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Project Partners: WCRC, Colorado Dept. of Public Health & Education, Colorado Division Reclamation Mining & Safety and the US Forest Service.