Berkeley Pit
E790403
Berkeley Pit is a former open-pit copper mine in Butte, Montana, now a highly acidic, contaminated lake and a notable environmental Superfund site.
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
Superfund site
ⓘ
open-pit copper mine ⓘ toxic lake ⓘ |
| closureReason |
declining copper prices
ⓘ
high operating costs ⓘ |
| contaminant |
arsenic
ⓘ
cadmium ⓘ copper ⓘ heavy metals ⓘ sulfuric acid ⓘ zinc ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | Silver Bow County, Montana NERFINISHED ⓘ |
| createdBy | expansion of underground mining operations to open-pit mining ⓘ |
| designatedAsSuperfund | 1983 ⓘ |
| economicRole | major copper producer during mid-20th century ⓘ |
| endDate | 1982 ⓘ |
| environmentalImpact |
long-term water contamination
ⓘ
wildlife mortality ⓘ |
| environmentalStatus | U.S. EPA Superfund site ⓘ |
| floodingBegan | 1982 ⓘ |
| hasFeature | viewing platform for tourists ⓘ |
| location | Butte, Montana NERFINISHED ⓘ |
| managedBy |
Montana Department of Environmental Quality
NERFINISHED
ⓘ
U.S. Environmental Protection Agency NERFINISHED ⓘ |
| mineralExtracted |
copper
ⓘ
gold ⓘ molybdenum ⓘ silver ⓘ |
| miningMethod | open-pit mining ⓘ |
| near | downtown Butte, Montana ⓘ |
| notableEvent |
mass death of snow geese in 1995
ⓘ
recurring bird mortality incidents ⓘ |
| operatedBy |
Anaconda Copper Mining Company
NERFINISHED
ⓘ
Atlantic Richfield Company NERFINISHED ⓘ |
| ownedBy | Atlantic Richfield Company NERFINISHED ⓘ |
| partOf |
Butte mining district
NERFINISHED
ⓘ
Silver Bow Creek/Butte Area Superfund site NERFINISHED ⓘ |
| remediationPlan | Berkeley Pit water treatment system NERFINISHED ⓘ |
| replaced | part of the historic Butte Hill neighborhood ⓘ |
| risk |
potential contamination of regional groundwater
ⓘ
potential overflow into surrounding waterways ⓘ |
| startDate | 1955 ⓘ |
| state | Montana NERFINISHED ⓘ |
| threatens |
Clark Fork River
NERFINISHED
ⓘ
Silver Bow Creek NERFINISHED ⓘ |
| touristAttraction | yes ⓘ |
| waterColor | reddish-brown ⓘ |
| waterLevel | monitored and controlled ⓘ |
| waterpH | highly acidic ⓘ |
| waterType | acid mine drainage ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.