Cochrane Dam

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Cochrane Dam
Cochrane Dam is located in Montana
Cochrane Dam
Location of Cochrane Dam in Montana
CountryUnited States of America
LocationCascade County, Montana
Coordinates47°33′11″N 111°08′56″W / 47.55306°N 111.14889°W / 47.55306; -111.14889Coordinates: 47°33′11″N 111°08′56″W / 47.55306°N 111.14889°W / 47.55306; -111.14889
StatusIn use
Opening date1958
Owner(s)NorthWestern Corporation
Dam and spillways
Type of damConcrete gravity
ImpoundsMissouri River
Height59 ft (18 m)
Length753 ft (230 m)
Spillway typeGated service
CreatesCochrane Lake
Total capacity2,700 acre⋅ft (3,300,000 m3)
Catchment area24,000 sq mi (62,000 km2)
Surface area218 acres (88 ha)
Power Station
Installed capacity64 MW
Annual generation298,390,000 KWh (2009)[1]

Cochrane Dam is a run-of-the river hydroelectric dam on the Missouri River, about 8 miles (13 km) northeast of Great Falls in the U.S. state of Montana.[2] The dam has a concrete gravity design and is 59 feet (18 m) high and 753 feet (230 m) long. Its power station has two generators capable of producing 64 megawatts. Construction of the dam was finished in 1958.[3] Montana Power Company originally built the dam, PPL Corporation purchased it in 1997 and sold it to NorthWestern Corporation in 2014.


  1. ^ "Cochrane". Carbon Monitoring for Action. Retrieved 2018-04-26.
  2. ^ "Dams". PPL Montana. Retrieved 2011-03-06.
  3. ^ "Cochrane Dam". Producing Power. PPL Montana. Archived from the original on 2011-07-15. Retrieved 2011-03-06.