MWPowerPlantFacts
PowerPlantFactsEvidence report · prepared 2 September 2026https://powerplantfacts.com/entity/3918
EIA plant 3918

Silver Creek · Lewis · WA

Mossyrock

Operated by City of Tacoma - (WA)

Annual generation811,561 MWhSum of represented EIA-923 rows
Fuel codesWATCodes retained from EIA records
Grid contextCity of Tacoma, Department of Public Utilities, Light DivisionBalancing authority or NERC region

Published location

Where is Mossyrock?

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

46.534700, -122.424700

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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
198,504 MWh
289,612 MWh
367,078 MWh
478,303 MWh
576,401 MWh
6101,704 MWh
746,878 MWh
853,356 MWh
949,048 MWh
1054,667 MWh
1133,575 MWh
1262,435 MWh

Operating generators

IDTechnologyFuelMWStatus
51Conventional HydroelectricWAT150OP
52Conventional HydroelectricWAT150OP

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Identity, technology and limitations
EIA plant ID
3918
Sector
Electric Utility
Water source
Cowlitz River
Data edition
2024-final