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43.2 MW Hydro operating in Mason, WA — City of Tacoma, Department of Public Utilities, Light Division
43.2 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
1926
Operating Since
Coordinates
47.4223, -123.2203
County
Mason, WA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City of Tacoma - (WA) | — | — |
| Owner(s) | City of Tacoma - (WA) | — | — |
| Status | Operating | — | — |
Cushman 1 is a hydroelectric power plant located in Mason County, Washington. The plant, which began operating in 1926, has a total capacity of 43.2 MW derived from two generators. It is owned and operated by City of Tacoma - (WA). The primary fuel source for the plant is water ("WAT" in EIA parlance).
In the most recent year with available data, Cushman 1 generated 120,047 MWh of electricity, resulting in a capacity factor of 31.6%. The plant's balancing authority is City of Tacoma, Department of Public Utilities, Light Division, and it operates within the Western Electricity Coordinating Council (WECC) NERC region. Cushman 1 is ranked as the 33rd largest power plant in Washington out of 75, and nationally it is ranked 333rd out of 1464 plants.
Generated from EIA, GEM, and public data sources
Grid Region
Pacific Northwest
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
23.0K MWh
Latest Month
120.0K MWh
Annual Generation
31.6%
Capacity Factor
2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $99.1M
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
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ask pi about Cushman 1City of Tacoma, Department of Public Utilities, Light Division (TPWR)
Grid Voltage
110.0 kV
Regulatory Status
RE — Regulated
Entity Type
Municipal
Sector
Electric Utility