MTPR

Berkeley Pit

State officials say a proposed expansion to Montana Resources’ tailings impoundment in Butte next to its active copper mine there won’t impact groundwater.

Weather Pushes Back Project To Treat Berkeley Pit Water

Mar 14, 2019
The Berkeley pit in Butte, Montana, as seen from above.
NASA (CC-BY-2)

BUTTE, Mont. (AP) — Last month's harsh winter weather has delayed a pilot project that aims to stop the rise of toxic water in Butte's Berkeley Pit.

Montana Resources' Mark Thompson tells The Montanan Standard the mining pit is still frozen over, construction has slowed and the project to treat and discharge the water isn't expected to begin until June.

Mark Mariano does daily waterfowl observations rounds at the Berkeley Pit during migration season. October 2018.
Nora Saks / MTPR

With the fall bird migration now in full swing, the companies in charge of Butte’s Berkeley Pit are using their new and improved scientific bird-hazing program to keep birds away. This week, their program got put to the test.

Two years ago this November, Butte made national headlines when several thousand late-migrating snow geese landed on the Berkeley Pit, exhausted and died. The huge numbers overwhelmed the companies jointly in charge of managing the former open pit copper mine and their usual methods of hazing birds off the massive toxic lake it now contains. 

The Parrot Tailings removal project is underway in Butte. September 2018.
Nora Saks

Near Butte’s Civic Center, a massive construction project is going on across the street, in the heart of town. Mammoth excavators gouge out a colossal hole in the ground. Jumbo haul trucks whisk 70 ton loads of chewed-up earth away on repeat.

Yankee Doodle Tailings Impoundment. Butte, MT. Oct. 3, 2018.
Nora Saks / MTPR

Thursday night, state environmental regulators are holding a public input meeting in Butte on Montana Resource’s application to expand the tailings impoundment next to their active copper mine there.

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