Cowlitz Falls
Lewis County, Washington · EIA plant ID 7427 · Operator: PUD No 1 of Lewis County
Nameplate70MWSummer 70 MW
Generators2in service
Net generation196GWh12 mo to Dec 2025
Capacity factor32%hydro units, summer MW
Heat rate—thermal plants only
First online1994
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) |
|---|---|---|---|
| 2002 | 230.5 | 37.6% | — |
| 2003 | 215.7 | 35.2% | — |
| 2004 | 238.1 | 38.7% | — |
| 2005 | 178.4 | 29.1% | — |
| 2006 | 258.4 | 42.1% | — |
| 2007 | 223.2 | 36.4% | — |
| 2008 | 224.4 | 36.5% | — |
| 2009 | 233.8 | 38.1% | — |
| 2010 | 242.9 | 39.6% | — |
| 2011 | 215.4 | 35.1% | — |
| 2012 | 305.3 | 49.6% | — |
| 2013 | 252.7 | 41.2% | — |
| 2014 | 290.2 | 47.3% | — |
| 2015 | 188.7 | 30.8% | — |
| 2016 | 250.8 | 40.8% | — |
| 2017 | 283 | 46.2% | — |
| 2018 | 226.9 | 37.0% | — |
| 2019 | 165.3 | 27.0% | — |
| 2020 | 243.6 | 39.6% | — |
| 2021 | 237 | 38.6% | — |
| 2022 | 235.7 | 38.4% | — |
| 2023 | 190.4 | 31.1% | — |
| 2024 | 196.3 | 31.9% | — |
| 2025 | 195.6 | 31.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| U#1 | Conventional Hydroelectric | HY | 35 | 35 | Jun 1994 | Operating | — | coming soon |
| U#2 | Conventional Hydroelectric | HY | 35 | 35 | Jun 1994 | Operating | — | coming soon |
Owner / operator
Operator: PUD No 1 of Lewis County. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| PUD No 1 of Lewis County | 100.0% | 70 MW |
Nearby plants
Within 80 km.
| Mossyrock | 300 MW | 25.3 km |
| Mayfield | 162 MW | 36.9 km |
| Alder | 51 MW | 40.3 km |
| Packwood | 28 MW | 43.8 km |
| LaGrande | 64 MW | 43.8 km |
| Swift 1 | 240 MW | 45.6 km |