MWPowerPlantFacts
PowerPlantFactsEvidence report · prepared 2 September 2026https://powerplantfacts.com/entity/3927
EIA plant 3927

Kahlotus · Walla Walla · WA

Lower Monumental

Operated by USACE Northwestern Division

Annual generation1,281,014 MWhSum of represented EIA-923 rows
Fuel codesWATCodes retained from EIA records
Grid contextBonneville Power AdministrationBalancing authority or NERC region

Published location

Where is Lower Monumental?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

46.563500, -118.539700

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Map data © OpenStreetMap contributors

Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.

2024 monthly net generation

MonthNet generation
1132,651 MWh
2178,237 MWh
3199,707 MWh
472,038 MWh
551,680 MWh
6101,305 MWh
788,691 MWh
890,184 MWh
992,750 MWh
1079,313 MWh
1189,639 MWh
12104,819 MWh

Operating generators

IDTechnologyFuelMWStatus
1Conventional HydroelectricWAT135OA
2Conventional HydroelectricWAT135OP
3Conventional HydroelectricWAT135OP
4Conventional HydroelectricWAT135OP
5Conventional HydroelectricWAT135OP
6Conventional HydroelectricWAT135OP

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Identity, technology and limitations
EIA plant ID
3927
Sector
Electric Utility
Water source
Snake River
Data edition
2024-final