Grays Harbor Energy Facility
Grays Harbor County, Washington · EIA plant ID 7999 · Operator: Invenergy Services LLC
Nameplate715MWSummer 595 MW
Generators3in service
Net generation1,732GWh12 mo to Aug 2026
Capacity factor33%gas/coal/oil units, summer MW
Heat rate8,565Btu/kWhfossil units, electric fuel, HHV
First online2008Runs as baseload
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2008 | 818.5 | 21.9% | 6,934 |
| 2009 | 1,675.1 | 30.0% | 7,153 |
| 2010 | 1,142.1 | 20.5% | 7,823 |
| 2011 | 230.7 | 4.1% | 7,587 |
| 2012 | 156.5 | 2.8% | 7,440 |
| 2013 | 1,534.7 | 27.5% | 7,228 |
| 2014 | 1,705.4 | 30.6% | 7,381 |
| 2015 | 3,005.3 | 53.9% | 7,617 |
| 2016 | 2,818.3 | 53.1% | 7,597 |
| 2017 | 2,834.2 | 53.6% | 7,811 |
| 2018 | 2,478.3 | 46.8% | 7,860 |
| 2019 | 3,407.1 | 64.4% | 7,814 |
| 2020 | 2,360.7 | 44.5% | 8,211 |
| 2021 | 3,540.9 | 67.9% | 7,745 |
| 2022 | 3,163.2 | 60.7% | 7,659 |
| 2023 | 3,618.2 | 69.4% | 7,621 |
| 2024 | 2,779.7 | 53.2% | 7,691 |
| 2025 | 3,649.4 | 70.0% | 7,823 |
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 |
|---|---|---|---|---|---|---|---|---|
| CT1 | Natural Gas Fired Combined Cycle | CT | 198.9 | 151 | May 2008 | Operating | — | coming soon |
| CT2 | Natural Gas Fired Combined Cycle | CT | 198.9 | 153 | May 2008 | Operating | — | coming soon |
| ST1 | Natural Gas Fired Combined Cycle | CA | 317.1 | 291 | May 2008 | Operating | — | coming soon |
| 1 | — | CT | 175 | 165 | planned Apr 2008 | not_current | — | coming soon |
| 1B | — | CT | 175 | 165 | planned Apr 2008 | not_current | — | coming soon |
| 1C | — | CA | 300 | 270 | planned Apr 2008 | not_current | — | coming soon |
Owner / operator
Operator: Invenergy Services LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Invenergy Services LLC | 100.0% | 715 MW |
Nearby plants
Within 80 km.
| Cosmo Specialty Fibers Plant | 15 MW | 21.4 km |
| Sierra Pacific Aberdeen | 18 MW | 22.3 km |
| Wynoochee | 13 MW | 47.2 km |
| Coastal Energy Project | 6 MW | 48.6 km |
| Centralia Battery Energy Storage System | — | 49.9 km |
| Cushman 2 | 85 MW | 50.7 km |