Current possibilities include using the polluted Berkeley Pit as a wastes repository. In addition, Atlantic Richfield is considering erecting a heavy-duty conveyor system to transport contaminated ...

The Berkeley Pit has been a festering sore since 1982, when, the Anaconda Copper Co. closed the open-pit mine, turned off the pumps and let water fill it.

BUTTE, Mont. — Officials in Butte continue to investigate the feasibility of using the Berkeley Pit as a repository for ongoing superfund cleanup of the Mining City. During a meeting regarding ...

Since 2019, Montana Resources, in partnership with the Atlantic-Richfield Co., has pumped 9 billion gallons of treated Berkeley Pit water into Silver Bow Creek.

BUTTE — The area surrounding the Berkeley Pit — a man-made lake of toxic water in Butte that would likely kill a human or animal that drank from it — is teeming with life.

Construction of a water treatment plant near the Berkeley Pit will start this year -- unless Montana Resources announces plans to resume mining. MR officials have until June 1 to decide whether to ...

MONTANA Skyrocketing electricity prices in Montana are indirectly raising the level of Butte’s Berkeley Pit, a 900-foot-deep, 30 billion-gallon soup of acid-mine runoff that ranks as the nation ...