Today I’d like to focus on modern mining accidents closer to home. Take, for example, the Grouse Creek gold and silver mine in Idaho, which began operating in 1994. Located near Jordan Creek – a stream federally designated as critical salmon habitat – this modern mine experienced problems from the start. Construction activities caused a landslide which buried 100 yards of Jordan Creek. Less than a year into operation, a tailings impoundment began leaking and numerous cyanide spills had occurred. The mine had amassed over 250 water quality violations by the time it closed in 1997. In 1999, cyanide was still leaking from the mine into waters that were home to endangered Chinook salmon, steelhead and bull trout. The federal government issued a consent order to clean up the mine under CERCLA.
Or take the Gilt Edge mine in the Black Hills of South Dakota. This gold and silver mine operated from 1988 to 1996. Shortly after mining began, cyanide leaked into the groundwater and nearby Strawberry and Bear Butte Creeks. The mine began generating acid mine drainage in 1992. This acid drainage left area streams unable to support a viable fish population. It was designated as a Superfund site in December 2000.
Closer to the proposed Pebble Mine, the Fort Knox gold mine north of Fairbanks spilled 45,000 gallons of cyanide water solution after a bulldozer struck a supply line in August 2012. Officials say it was cleaned up successfully, although a long-term sampling program has yet to assess the extent of the soil contamination.
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