Yelm
Hydro power plant in Thurston County, Washington. 12 MW of nameplate capacity across 3 generators, operated by City of Centralia - (WA).
Also known as EIA plant 3878
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 12 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- December 1930First generator online
- Operator
- City of Centralia - (WA)EIA operator ID 3295
- Grid
- BPATBalancing authority BPAT
- Price nodes
- None linkedNo verified ISO node
- Location
- Thurston County, WA46.9749, −122.6358
- EIA plant ID
- 3878EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Yelm produces
Free · EIA-923Net generation, 2025
32.2 GWh
32,223 MWh, final
Capacity factor, 2025
30.7%
2024: 31.9%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
0.4–85.7
GWh a year. Low 2022, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 0 | Not reported | 12 of 12 |
| 2001 | 63,124 | Not reported | 12 of 12 |
| 2002 | 74,793 | Not reported | 12 of 12 |
| 2003 | 58,606 | Not reported | 12 of 12 |
| 2004 | 78,639 | Not reported | 12 of 12 |
| 2005 | 67,226 | Not reported | 12 of 12 |
| 2006 | 70,766 | Not reported | 12 of 12 |
| 2007 | 63,750 | Not reported | 12 of 12 |
| 2008 | 73,796 | Not reported | 12 of 12 |
| 2009 | 70,363 | Not reported | 12 of 12 |
| 2010 | 48,978 | 46.6% | 12 of 12 |
| 2011 | 77,363 | 73.6% | 12 of 12 |
| 2012 | 75,960 | 72.1% | 12 of 12 |
| 2013 | 71,555 | 68.1% | 12 of 12 |
| 2014 | 55,004 | 52.3% | 12 of 12 |
| 2015 | 69,324 | 65.9% | 12 of 12 |
| 2016 | 76,253 | 72.3% | 12 of 12 |
| 2017 | 85,733 | 81.6% | 12 of 12 |
| 2018 | 73,625 | 70.0% | 12 of 12 |
| 2019 | 64,114 | 61.0% | 12 of 12 |
| 2020 | 39,986 | 37.9% | 12 of 12 |
| 2021 | 30,763 | 29.3% | 12 of 12 |
| 2022 | 357 | 0.3% | 12 of 12 |
| 2023 | 26,220 | 24.9% | 12 of 12 |
| 2024 | 33,669 | 31.9% | 12 of 12 |
| 2025 | 32,223 | 30.7% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 3.0 | December 1930 |
| 2 | Conventional Hydroelectric | 3.0 | December 1930 |
| 3 | Conventional Hydroelectric | 6.0 | December 1955 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists City of Centralia - (WA) as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Questions about Yelm
How much power does Yelm produce?
Yelm reported 32,223 MWh (32.2 GWh) of net generation in 2025, a 30.7% capacity factor on 12 MW of nameplate capacity.
Where is Yelm?
Yelm is in Thurston County, Washington, at 46.9749, −122.6358. It is in the Bonneville Power Administration balancing area (BPAT).
Who operates Yelm?
EIA-860M for August 2026 lists City of Centralia - (WA) as the operator (EIA operator ID 3295). The operator is not always the owner.
When did Yelm start operating?
Its first generator began operating in December 1930, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page