By some counts, half a million abandoned mines in US. Cost of cleanup $32b-$72b: @cironline http://t.co/l7x1NAqPTd
— Circle of Blue (@circleofblue) October 23, 2014
Bonita Mine acid mine drainage. Photo via the Animas River Stakeholders Group.
Mary Murphy Mine
Eagle Mine
Saints John Mine miners circa 1880
Red Cliff miner dinner 1888
Smuggler Mine back in the day via GregRulon.com
Acid mine drainage Pennsylvania Mine via the Summit County Citizens Voice
Schwartzwalder Mine via Division of Reclamation and MIning
Abandoned Colorado mines that significantly affect surface water directly via The Denver Post
Colorado abandoned mines
Colorado Mineral Belt via Wikipedia
Argo Mine Boulder County
Leadville Mine Drainage Tunnel
Summitville Mine superfund site
Climax Mine
Washington Mine Illinois Gulch