Ross
Whatcom County, Washington · EIA plant ID 6202 · Operator: City of Seattle - (WA)
Nameplate450MWSummer 450 MW
Generators4in service
Net generation763GWh12 mo to Aug 2026
Capacity factor19%hydro units, summer MW
Heat rate—thermal plants only
First online1952
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 | 390.3 | 9.9% | — |
| 2002 | 834.8 | 21.2% | — |
| 2003 | 725 | 18.4% | — |
| 2004 | 678.7 | 17.2% | — |
| 2005 | 561.1 | 13.9% | — |
| 2006 | 638.7 | 15.8% | — |
| 2007 | 857.2 | 21.3% | — |
| 2008 | 656.3 | 21.2% | — |
| 2009 | 619.1 | 20.1% | — |
| 2010 | 645.7 | 19.5% | — |
| 2011 | 868.2 | 26.2% | — |
| 2012 | 937.8 | 28.2% | — |
| 2013 | 724.3 | 21.9% | — |
| 2014 | 794.4 | 24.0% | — |
| 2015 | 682.8 | 20.6% | — |
| 2016 | 789.5 | 21.7% | — |
| 2017 | 739.6 | 18.8% | — |
| 2018 | 688.2 | 17.5% | — |
| 2019 | 522.6 | 13.3% | — |
| 2020 | 653.9 | 16.5% | — |
| 2021 | 822.3 | 20.9% | — |
| 2022 | 747.2 | 19.0% | — |
| 2023 | 411.6 | 10.4% | — |
| 2024 | 410.1 | 10.4% | — |
| 2025 | 531.6 | 13.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 41 | Conventional Hydroelectric | HY | 112.5 | 112.5 | Nov 1956 | Operating | — | coming soon |
| 42 | Conventional Hydroelectric | HY | 112.5 | 112.5 | Jan 1954 | Operating | — | coming soon |
| 43 | Conventional Hydroelectric | HY | 112.5 | 112.5 | Apr 1953 | Operating | — | coming soon |
| 44 | Conventional Hydroelectric | HY | 112.5 | 112.5 | Dec 1952 | Operating | — | coming soon |
Owner / operator
Operator: City of Seattle - (WA). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of Seattle - (WA) | 100.0% | 450 MW |
Nearby plants
Within 80 km.
| Diablo | 182 MW | 5.1 km |
| Gorge | 207 MW | 11 km |
| Newhalem | 2 MW | 14.2 km |
| Upper Baker | 105 MW | 46.7 km |
| Koma Kulshan Associates | 12 MW | 48.4 km |
| Lower Baker | 104 MW | 53.5 km |