Cushman 1
Mason County, Washington · EIA plant ID 3914 · Operator: City of Tacoma - (WA)
Nameplate50MWSummer 53 MW
Generators2in service
Net generation108GWh12 mo to Dec 2025
Capacity factor23%hydro units, summer MW
Heat rate—thermal plants only
First online1926
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 85.5 | 20.8% | — |
| 2002 | 146.8 | 38.1% | — |
| 2003 | 119.3 | 30.9% | — |
| 2004 | 90.7 | 23.5% | — |
| 2005 | 263.8 | 68.5% | — |
| 2006 | 149.2 | 38.7% | — |
| 2007 | 132.5 | 32.9% | — |
| 2008 | 88.9 | 22.0% | — |
| 2009 | 20.1 | 5.0% | — |
| 2010 | 156.2 | 33.0% | — |
| 2011 | 156.4 | 33.4% | — |
| 2012 | 108.7 | 23.2% | — |
| 2013 | 97 | 20.7% | — |
| 2014 | 131.7 | 28.2% | — |
| 2015 | 107.1 | 22.9% | — |
| 2016 | 185 | 39.5% | — |
| 2017 | 145.6 | 31.1% | — |
| 2018 | 114.9 | 24.6% | — |
| 2019 | 76 | 16.3% | — |
| 2020 | 104.9 | 22.4% | — |
| 2021 | 136.5 | 29.2% | — |
| 2022 | 109.3 | 23.4% | — |
| 2023 | 115.5 | 24.7% | — |
| 2024 | 120 | 25.6% | — |
| 2025 | 107.8 | 23.0% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 21 | Conventional Hydroelectric | HY | 25.2 | 26.7 | Jun 1926 | Operating | — | coming soon |
| 22 | Conventional Hydroelectric | HY | 25.2 | 26.7 | Jul 1926 | Operating | — | coming soon |
Owner / operator
Operator: City of Tacoma - (WA). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of Tacoma - (WA) | 100.0% | 50 MW |
Nearby plants
Within 80 km.
| Cushman 2 | 85 MW | 7.3 km |
| Lilliwaup Falls Generating | 1 MW | 10.1 km |
| Wynoochee | 13 MW | 28.8 km |
| Rocky Brook Hydroelectric | 2 MW | 39.7 km |
| Grays Harbor Energy Facility | 715 MW | 53.5 km |
| AGATE BESS | — | 60.5 km |