Wynoochee — Plant Summary
- EIA Plant ID
- 7127
- Capacity
- 12.8 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Grays Harbor, WA
- Operating Since
- 1994
- Generators
- 1
- Operator
- City of Tacoma - (WA)
- Parent Company
- —
- Annual Generation
- 30,839 MWh
- Capacity Factor
- 27.4%
- Balancing Authority
- City of Tacoma, Department of Public Utilities, Light Division
- ISO/RTO
- —
- NERC Region
- WECC
Wynoochee
OperatingHydro
Ranked #47 of 75 Hydro plants in WA#582 of 1454 nationally
12.8 MW Hydro operating in Grays Harbor, WA — City of Tacoma, Department of Public Utilities, Light Division
EIAWD
12.8 MW
Nameplate Capacity
1
Generators
unit
Conventional Hydroelectric
Technology
1994
Operating Since
Location
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City of Tacoma - (WA) | — | — |
| Owner(s) | City of Tacoma - (WA) | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The Wynoochee hydroelectric plant is located in Grays Harbor County, Washington. The plant has a total capacity of 12.8 MW and began operating in 1994. It is owned and operated by the City of Tacoma - (WA). The plant utilizes a single generator and conventional hydroelectric technology, with water (WAT) as its primary fuel source. Wynoochee is ranked 48th out of 75 power plants in Washington state, and 594th out of 1464 nationally.
In the most recent year with available data, the plant generated 30,839 MWh of electricity, achieving a capacity factor of 27.4%. The Wynoochee plant operates within the balancing authority of the City of Tacoma, Department of Public Utilities, Light Division, and is part of the Western Electricity Coordinating Council (WECC) NERC region.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
City of Tacoma, Department of Public Utilities, Light Division
Grid Voltage
34.5 kV
Regulatory Status
RE
Entity Type
Municipal
Sector
Electric Utility
Generation
5.2K MWh
Latest Month
30.8K MWh
Annual Generation
27.4%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (3)Beta
Industry·other
Unplug With a Camping Trip to Coho Campground at Wynoochee Lake
With 44 standard campsites, there's a spot for all types to camp out at Coho Campground. Spaces can accommodate tents, trailers and RVs up to 36 feet.
GraysHarborTalk·1 years ago
Industry·other
The power of the dam: Hydropower’s place in Washington state’s clean energy economy
LAKE CUSHMAN — Apples, evergreens and water rushing over colossal-sized concrete: few things are as iconic in Washington as the dams wedged...
Kitsap Sun·3 years ago
Industry·other
Wynoochee Mitigation Wildlife Area Unit
The Wynoochee Mitigation Unit, located along the Wynoochee River, is popular during hunting season and used throughout the year for hiking, biking, and...
Washington Department of Fish and Wildlife (.gov)·6 years ago
Last updated 2026-03-14
View all articles