Ice Harbor
Walla Walla County, Washington · EIA plant ID 3925 · Operator: USACE Northwestern Division
Nameplate603MWSummer 513 MW
Generators6in service
Net generation1,496GWh12 mo to Aug 2026
Capacity factor33%hydro units, summer MW
Heat rate—thermal plants only
First online1962
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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 | 1,862.3 | 30.7% | — |
| 2002 | 1,395.4 | 23.0% | — |
| 2003 | 1,689.1 | 27.8% | — |
| 2004 | 1,447.3 | 27.3% | — |
| 2005 | 1,320.8 | 25.0% | — |
| 2006 | 2,207.8 | 41.8% | — |
| 2007 | 1,444.8 | 27.4% | — |
| 2008 | 1,690.7 | 31.9% | — |
| 2009 | 1,824.6 | 34.5% | — |
| 2010 | 1,498.7 | 28.4% | — |
| 2011 | 2,477.2 | 46.9% | — |
| 2012 | 1,810.4 | 34.2% | — |
| 2013 | 1,385.4 | 26.2% | — |
| 2014 | 1,725.9 | 32.7% | — |
| 2015 | 1,439.3 | 27.3% | — |
| 2016 | 1,667.9 | 32.5% | — |
| 2017 | 2,036.3 | 42.5% | — |
| 2018 | 1,711 | 35.7% | — |
| 2019 | 1,722.3 | 37.6% | — |
| 2020 | 1,573.8 | 34.3% | — |
| 2021 | 1,405.8 | 32.2% | — |
| 2022 | 1,474.6 | 33.7% | — |
| 2023 | 1,350.1 | 30.0% | — |
| 2024 | 1,340.9 | 29.8% | — |
| 2025 | 1,511.2 | 33.6% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 90 | 72 | Jan 1962 | Operating (Out of service, expected back within the year) | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 90 | 90 | Mar 1962 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 90 | 90 | Mar 1962 | Operating (Out of service, expected back within the year) | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 111 | 87 | Dec 1975 | Operating | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 111 | 87 | Dec 1975 | Operating | — | coming soon |
| 6 | Conventional Hydroelectric | HY | 111 | 87 | Feb 1976 | Operating | — | coming soon |
Owner / operator
Operator: USACE Northwestern Division. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| USACE Northwestern Division | 100.0% | 603 MW |
Nearby plants
Within 80 km.
| FPL Energy Vansycle LLC (WA) | 177 MW | 21.3 km |
| Nine Canyon | 96 MW | 23.9 km |
| FPL Energy Vansycle LLC (OR) | 123 MW | 26.8 km |
| Potholes East Canal 66.0 | 2 MW | 32.1 km |
| Eltopia Branch Canal 4.6 | 2 MW | 32.1 km |
| Horn Rapids Solar, Storage and Training | 4 MW | 35.9 km |