Environment: Bulkhead a big step in Peru Creek cleanup

Summit County Citizens Voice

All-out remediation effort targets acid mine drainage near Keystone Ski Area

Remediation work in progress at the Pennsylvania Mine site in Summit County, Colorado. Photo via Snake River Watershed Task Force. Remediation work in progress at the Pennsylvania Mine site in Summit County, Colorado. Photo via Snake River Watershed Task Force.

By Bob Berwyn

FRISCO — For decades, the abandoned Pennsylvania Mine high has been oozing heavy metals — zinc, manganese, cadmium, lead and and arsenic — into the waters of Peru Creek, a small tributary of the Snake River near Keystone, Colorado. The site has been the focus of intensive study during the past 15 years with the goal of improving water quality downstream.

Last week, engineers and environmental experts took a big step toward trying to staunch that flow by blocking one of the mine tunnels. If all goes well, the new bulkhead could reduce the direct discharge from the mine by about two-thirds, said Jeff Graves, a remediation expert with the Colorado Division of Reclamation Mining and…

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