La Grande-4 generating station

"LG-4" redirects here. For other uses, see LG4 (disambiguation).

The La Grande-4 (LG-4) is a hydroelectric generating station on the La Grande River in Quebec, Canada that is part of Hydro-Québec's James Bay Project. The station can generate 2,779 MW and was commissioned in 1984.^[1][2][3] It generates electricity through the reservoir and dam system.

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