Libby Dam
| Libby Dam Lake Koocanusa |
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| Coordinates | 48 ° 24 '38 " N , 115 ° 18' 53" W | ||||||||
| Data on the structure | |||||||||
| Lock type: | Gravity dam of concrete | ||||||||
| Construction time: | 1966-1972 | ||||||||
| Height of the barrier structure : | 112.8 m | ||||||||
| Height above foundation level : | 129 m | ||||||||
| Height of the structure crown: | 753.5 m | ||||||||
| Crown length: | 916 m | ||||||||
| Power plant output: | 600 MW | ||||||||
| Operator: | US Army Corps of Engineers | ||||||||
| Data on the reservoir | |||||||||
| Altitude (at congestion destination ) | 749.5 m | ||||||||
| Water surface | 188.3 km² | ||||||||
| Reservoir length | 131 km | ||||||||
| Reservoir width | 3.8 km | ||||||||
| Total storage space : | 6100 million m³ | ||||||||
| Catchment area | 23 270 km² | ||||||||
| Design flood : | 4th 106 m³ / s | ||||||||
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The Libby Dam is a dam on the Kootenay River in the US state of Montana . He dams the river to Lake Koocanusa . The reservoir is part of the Columbia River system .
dam
The dam, built between 1966 and 1972, is 27 km above the small town of Libby . The Libby Dam is a multi-purpose project. It is used for flood protection, energy generation and recreation. The dam is a 916 m long gravity dam made of concrete . The height above the foundation level is 129 m. The dam is designed for earthquakes measuring 6.5 on the Richter scale.
Lake Koocanusa
The 131 km long and up to 3.8 km wide reservoir extends as far as British Columbia in Canada . The southern 74 km of the reservoir are in Montana. The Canadian part of the reservoir lies in the area of the Rocky Mountain Trench fault zone . When the water level is normal, the water level is 749.5 m . The lake covers an area of 188.3 km². The reservoir's tributaries are the Kootenay River and Elk River . The usable storage volume is 6100 million m³. The maximum storage space is 7200 million m³. The flood relief is designed for 4106 m³ / s. The following types of fish are caught in Lake Koocanusa: rainbow trout , (West Slope) cutthroat trout , brook trout , sockeye salmon , burbot and herring vendace .
power plant
The hydropower plant has been supplying electricity since August 24, 1975. The operator is the US Army Corps of Engineers . The power plant has five generators of 120 MW each. The height of fall in normal traffic jams is 107 m. The expansion flow is 745.6 m³ / s.
