Lower Monumental

A 810 MW hydroelectric power plant in Walla Walla, Washington, owned by USACE Northwestern Division, commissioned in 1969.

Facility nameplate · EIA Plant ID 3927Hydroelectric
Nameplate capacity
810 MW
Primary fuel
Hydroelectric
Commissioned
1969
Owner
USACE Northwestern Division
Location
Walla Walla, Washington
Coordinates
46.5635, -118.5397
Generation (2024)
1,281 GWh
Status
Operating
Technology
Conventional Hydroelectric
Units
6

Location

Map of the United States showing the location of Lower Monumental

Walla Walla, Washington · 46.5635, -118.5397

Reported annual generation

YearGWh
20151,640.1
20161,987.1
20172,767.6
20182,383.4
20192,240.9
20201,637.3
20211,338.5
20221,682.6
20231,553
20241,281

Nearby power plants

PlantFuelCapacityDistance
Little GooseHydroelectric810 MW~39 km
Rattlesnake FlatWind144 MW~42 km
Tucannon River Wind FarmWind266.8 MW~42 km
Ice HarborHydroelectric603 MW~43 km
Adams Nielson SolarSolar19.2 MW~44 km
Russell D SmithHydroelectric6.1 MW~48 km

See all hydroelectric plants in Washington or browse all plants in Washington.