MWPowerPlantFacts
PowerPlantFactsEvidence report · prepared 2 September 2026https://powerplantfacts.com/entity/50382
EIA plant 50382

Walla Walla · Walla Walla · WA

Twin Reservoirs

Operated by Walla Walla City of

Annual generation7,321 MWhSum of represented EIA-923 rows
Fuel codesWATCodes retained from EIA records
Grid contextBonneville Power AdministrationBalancing authority or NERC region

Published location

Where is Twin Reservoirs?

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

46.088333, -118.254722

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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
1604 MWh
2569 MWh
3454 MWh
4358 MWh
5633 MWh
6868 MWh
71,067 MWh
8823 MWh
9573 MWh
10558 MWh
11328 MWh
12486 MWh

Operating generators

IDTechnologyFuelMWStatus
GEN1Conventional HydroelectricWAT2.2OP

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Identity, technology and limitations
EIA plant ID
50382
Sector
IPP Non-CHP
Water source
Mill Creek
Data edition
2024-final