La Grande-1 generating station

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La Grande-1 generating station
La Grande-1 generating station is located in Quebec
La Grande-1 generating station
Location of La Grande-1 generating station in Quebec
Official name Centrale La Grande-1
Country Canada
Location Baie-James, Quebec
Coordinates 53°44′04″N 78°34′25″W / 53.73444°N 78.57361°W / 53.73444; -78.57361Coordinates: 53°44′04″N 78°34′25″W / 53.73444°N 78.57361°W / 53.73444; -78.57361
Status Operational
Construction began 1989
Opening date 1994-1995
Construction cost C$2.5 billion
Owner(s) Hydro-Québec
Dam and spillways
Type of dam Barrage
Impounds La Grande River
Height 25 m (82 ft)
Length 2,584 m (8,478 ft)
Dam volume 1,070,000 m3 (38,000,000 cu ft)
Spillways 1
Spillway type Parabolic
Spillway capacity 16,280 m3/s (574,923 cu ft/s)
Total capacity 1,228 hm3 (4.34×1010 cu ft)
Active capacity 98 hm3 (3.5×109 cu ft)
Surface area 70 km2 (27 sq mi)
Maximum length 75 km (47 mi)
Normal elevation 32.0 m (105.0 ft)
Power Station
Type Run-of-the-river
Hydraulic head 27.5 m (90 ft)
Turbines 12 × fixed-blade propeller-type turbines
General Electric (8);
GEC Alsthom (4)
Installed capacity 1,436 MW
Capacity factor 57%
Annual generation 7,500 GWh
Source: Société d'énergie de la Baie James 1996

The La Grande-1 is a hydroelectric power station on the La Grande River that is part of Hydro-Québec's James Bay Project. The station can generate 1,436 MW and was commissioned in 1994–1995. A run of the river generating station, it is one of only two generating stations of the James Bay Project that use a reservoir without any major water-level fluctuations (the Laforge-2 generating station is the other). Thus, the amount of electricity generated by the station depends almost entirely on the water-flow of the river, which is largely controlled by upstream reservoirs and generating stations.[1]

See also[edit]


  1. ^ "Hydroelectric Plants in Quebec". Industcards. Retrieved 17 June 2015.

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