The La Grande-4 (LG-4) is a hydroelectric generating station on the La Grande River that is part of Hydro-Québec's James Bay Project. The station can generate 2,779 MW and was commissioned in 1984–1986. It generates electricity through the reservoir and dam system.

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La Grande-4 generating station
Aerial view of the La Grande-4 reservoir and dam
Official name	La Grande-4
Location	Baie-James, Quebec, Canada
Coordinates	53°53′10″N 73°27′45″W
Opening date	1986
Owner(s)	Hydro-Québec
Dam and spillways
Impounds	La Grande River
Height	125 m (410 ft)
Length	3,800 m (12,500 ft)
Spillway capacity	7,335 m3/s (259,033 cu ft/s)
Reservoir
Creates	LG-4 Reservoir
Surface area	765 km2 (295 sq mi)
Power Station
Hydraulic head	116.7 m (383 ft)
Turbines	9 × 308.8 MW (Francis turbine)
Installed capacity	2,779 MW
Hydro-Québec, The La Grande Complex visitor booklet, 2004, ISBN 2-550-41276-1

See also

• List of largest power stations in Canada
• List of hydroelectric stations in Quebec
• Reservoirs and dams in Canada

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