The Berkeley Pit in Butte, Montana is so acidic it has the potential to fry birds inside out in a matter of hours. Locals, such as Mark Mariano, use a variety of methods to scare them away. The lake ...

HELENA, Mont. (AP) — After thousands of snow geese died in the toxic water of a former open-pit mine in Montana last fall, the companies responsible for the pit are bringing out the big guns.

After a tense few days of struggling to get more than a thousand snow geese to leave the Berkeley Pit's contaminated water, Montana Resources officials spotted dead birds at first light Thursday. Due ...

BUTTE, Mont. — As darkness fell on Nov. 28, 2016, residents of Butte, heard the unmistakable honking of some 60,000 snow geese circling the Berkeley Pit, a defunct mine now flooded with toxic water. A ...

About 1,100 night migratory birds — American coots, grebes and ruddy ducks — landed on the Berkeley Pit Friday and were scared off with Montana Resources and Atlantic Richfield Company's growing ...

BUTTE — There we were, circling the vast Berkeley Pit lake in a fiberglass pontoon houseboat, sipping soft drinks from folding chairs, checking out the garden wall. Like its namesake in Glacier ...

HELENA — After thousands of snow geese died in the toxic water of a former open-pit mine in Montana last fall, the companies responsible for the pit are bringing out the big guns. Literally.

Shawn Moorman trains Montana Tech students to help Montana Resources identify species of migratory birds that might land on the toxic waters of the Berkeley Pit.

HELENA, Mont. (AP) — After thousands of snow geese died in the toxic water of a former open-pit mine in Montana last fall, the companies responsible for the pit are bringing out the big guns.

Shortly after an estimated 4,000 snow geese died from exposure to poisonous metal-laden water in the Berkeley Pit the liable companies, Montana Resources and Atlantic Richfield, reported they would be ...

BUTTE -- The estimated 3,000 to 4,000 snow geese that perished in December 2016 in the Berkeley Pit’s toxic water died of both heavy metals and sulfuric acid, according to U.S. Fish and Wildlife ...