Grand Coulee

💧 HydroelectricElectric Utility6,809 MW capacity

1st largest plant in Washington · 1st nationally

Grand Coulee is a hydroelectric power plant in Washington with a nameplate capacity of 6,809 MW. It generates roughly 15.6M MWh per year — enough to power about 1,484,002 average U.S. homes.

Its capacity factor of 26% reflects intermittent or peaking operation.

Peaking — intermittent or backup

Capacity6,809 MWnameplate

Annual Generation15.6M MWhEPA eGRID

Capacity Factor26%of theoretical max

Annual CO₂—metric tons

Location

Plant Name	Grand Coulee
Operator	U S Bureau Of Reclamation
City	Grand Coulee
County	Grant County
State	Washington
ZIP	99133
Coordinates	47.95751, -118.97732

Hydroelectric

Generators (33)

ID	Technology	Fuel	Capacity	Status	Online
22	Conventional Hydroelectric	Water	805 MW	Operating	1978
23	Conventional Hydroelectric	Water	805 MW	Operating	1979
24	Conventional Hydroelectric	Water	805 MW	Operating	1980
19	Conventional Hydroelectric	Water	600 MW	Operating	1975
20	Conventional Hydroelectric	Water	600 MW	Operating	1976
21	Conventional Hydroelectric	Water	600 MW	Operating	1976
1	Conventional Hydroelectric	Water	125 MW	Operating	1942
10	Conventional Hydroelectric	Water	125 MW	Operating	1951
11	Conventional Hydroelectric	Water	125 MW	Operating	1951
12	Conventional Hydroelectric	Water	125 MW	Operating	1951
13	Conventional Hydroelectric	Water	125 MW	Operating	1950
14	Conventional Hydroelectric	Water	125 MW	Operating	1950
15	Conventional Hydroelectric	Water	125 MW	Operating	1950
16	Conventional Hydroelectric	Water	125 MW	Operating	1949
17	Conventional Hydroelectric	Water	125 MW	Operating	1949
18	Conventional Hydroelectric	Water	125 MW	Operating	1949
2	Conventional Hydroelectric	Water	125 MW	Operating	1942
3	Conventional Hydroelectric	Water	125 MW	Operating	1941
4	Conventional Hydroelectric	Water	125 MW	Operating	1944
5	Conventional Hydroelectric	Water	125 MW	Operating	1943
6	Conventional Hydroelectric	Water	125 MW	Operating	1943
7	Conventional Hydroelectric	Water	125 MW	Operating	1947
8	Conventional Hydroelectric	Water	125 MW	Operating	1943
9	Conventional Hydroelectric	Water	125 MW	Operating	1948
PG10	Hydroelectric Pumped Storage	Water	53.5 MW	Operating	1983
PG11	Hydroelectric Pumped Storage	Water	53.5 MW	Operating	1983
PG12	Hydroelectric Pumped Storage	Water	53.5 MW	Operating	1984
PG9	Hydroelectric Pumped Storage	Water	53.5 MW	Operating	1983
PG7	Hydroelectric Pumped Storage	Water	50.0 MW	Operating	1973
PG8	Hydroelectric Pumped Storage	Water	50.0 MW	Operating	1973
LS1	Conventional Hydroelectric	Water	10.0 MW	Operating	1941
LS2	Conventional Hydroelectric	Water	10.0 MW	Operating	1941
LS3	Conventional Hydroelectric	Water	10.0 MW	Operating	1951

Grid context

NERC Region	WECC
Balancing Authority	Bonneville Power Administration

About Hydroelectric plants

Hydroelectric plants spin turbines using falling or flowing water — typically from a dam-impounded reservoir. They are dispatchable, long-lived, and emission-free at the point of generation, though large reservoirs can disrupt rivers and ecosystems and methane can be released from flooded vegetation.

Other plants in Grant County

View all plants in Grant County →