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Reclamation crews started removing the Mike Horse Dam at the Upper Blackfoot Mining Complex east of Lincoln, Mont. in 2014.
State and federal officials say a large mining clean up project in Montana is nearly complete and open for recreation.
At the Upper Blackfoot Mining Complex east of Lincoln, crews have removed roughly 1 million cubic yards of tailings and mine waste. The area is the former site of a lead and zinc mine and the six and a half story high Mike Horse Dam made of mining waste. The dam partially failed in the 1970s, flushing contaminated material downstream for almost 10 miles and into the Blackfoot River.