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
Generation (2024)
1,281 GWh
Status
Operating
Technology
Conventional Hydroelectric
Units
6
Reported annual generation
| Year | GWh | |
|---|---|---|
| 2015 | 1,640.1 | |
| 2016 | 1,987.1 | |
| 2017 | 2,767.6 | |
| 2018 | 2,383.4 | |
| 2019 | 2,240.9 | |
| 2020 | 1,637.3 | |
| 2021 | 1,338.5 | |
| 2022 | 1,682.6 | |
| 2023 | 1,553 | |
| 2024 | 1,281 |
Nearby power plants
| Plant | Fuel | Capacity | Distance |
|---|---|---|---|
| Little Goose | Hydroelectric | 810 MW | ~39 km |
| Rattlesnake Flat | Wind | 144 MW | ~42 km |
| Tucannon River Wind Farm | Wind | 266.8 MW | ~42 km |
| Ice Harbor | Hydroelectric | 603 MW | ~43 km |
| Adams Nielson Solar | Solar | 19.2 MW | ~44 km |
| Russell D Smith | Hydroelectric | 6.1 MW | ~48 km |
See all hydroelectric plants in Washington or browse all plants in Washington.