MTPR

Montana Resources

The Berkeley Pit.
Nora Saks / Montana Public Radio

Atlantic Richfield is proposing to build a new water treatment plant to further lower the level of the toxic lake inside the Berkeley Pit, in case the tailings dam that sits directly above it ever fails.

A map from a Montana Resources permit request showing the location of a proposed limestone mine near Drummond, Mont.
Montana Department of Environmental Quality

A proposal for a new limestone mine near Drummond is now open for public comment.

A subsidiary of the Washington Companies is seeking a permit from the state Department of Environmental Quality (DEQ) to operate a 546-acre open pit mine two-and-a-half miles west of Drummond.

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. 

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