The La Grande-1 hydroelectric plant is a run of the river hydroelectric power plant 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.

La Grande-1 Generating Station
Official name La Grande-1
Locale Quebec, Canada
Construction began 1993
Opening date 1995
Owner(s) Hydro-Québec
Dam and spillways
Impounds La Grande River
Spillway capacity 16,280 m3/s (574,923 cu ft/s)
Creates (Run-of-river)
Surface area 70 km (43 mi)
Power station
Type Yes
Hydraulic head 27.5 m (90 ft)
Turbines 12 × 114 MW (Fixed-blade propeller-type turbine)
Installed capacity 1,436 MW