ABANDONED MINE + ONGOING EXPLORATION
The Gilt Edge Mine operated from 1876 until 1999 near Deadwood, SD, until Brohm Mining Corporation walked away. Gilt Edge was named a Superfund site in 2000. The federal EPA and SD DENR now co-managed severe acid rock/mine drainage problems. With acid rock/mine drainage, anytime the exposed rock (high in sulfides) encounters water or oxygen, acid is produced.
Waters affected by this contamination include Strawberry Creek, which flows into Bear Butte Creek.
This site will require monitoring and reclamation for forever.
The state of South Dakota is slowly acquiring Gilt Edge from the federal government. This would make it easier to mine again.
The EPA and SD DENR have hired Agnico Eagle Mines Ltd. to help “clean up” Gilt Edge… and at the same time, Agnico is exploring to mine again. SD DENR has said publicly that Agnico is exploring to mine more gold without an exploration permit.