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Bonita Mine acid mine drainage. Photo via the Animas River Stakeholders Group.
Bulkheads, like this one at the Red and Bonita Mine, help stop mine water discharges and allow engineers to monitor the mine pool. Credit: EPA.
Summitville Mine superfund site
Argo Mine Boulder County
Central City back in the day
California Gulch back in the day
Mary Murphy Mine
Portal of the Pennsylvania Mine in Summit County, upstream from Keystone Resort. Photo courtesy of Jeff Graves, Colorado Division of Reclamation, Mining and Safety
Acid mine drainage Pennsylvania Mine via the Summit County Citizens Voice
Lincoln Park/Cotter Mill superfund site
Schwartwalder pipeline Cotter Ralston Creek
Gold King Mine entrance after blowout August 2015
Commodore waste rock superfund site Creede
Fault vein in Standard Mine Gunnison County
General view of the Sunnyside Mine, southwestern Colorado photo via the Denver Public Library
Gold King Mine circa 1899 via The Silverton Standard
Abandoned Colorado mines that significantly affect surface water directly via The Denver Post
Colorado abandoned mines