Boulder Park
Spokane County, Washington · EIA plant ID 8022 · Operator: Avista Corp
Nameplate25MWSummer 25 MW
Generators6in service
Net generation126GWh12 mo to Dec 2025
Capacity factor58%gas/coal/oil units, summer MW
Heat rate9,092Btu/kWhfossil units, electric fuel, HHV
First online2002Runs as baseload
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) |
|---|---|---|---|
| 2002 | 8.5 | — | — |
| 2003 | 15.2 | 7.1% | 9,787 |
| 2004 | 15.8 | 7.3% | 10,795 |
| 2005 | 15.8 | 7.3% | 9,789 |
| 2006 | 17.3 | 8.0% | 9,809 |
| 2007 | 23.3 | 10.8% | 9,676 |
| 2008 | 20.6 | 9.5% | 9,615 |
| 2009 | 27.8 | 12.9% | 9,548 |
| 2010 | 10.9 | 5.1% | 10,004 |
| 2011 | 9.1 | 4.2% | 10,103 |
| 2012 | 5.6 | 2.6% | 8,939 |
| 2013 | 25.9 | 12.0% | 9,375 |
| 2014 | 14.8 | 6.9% | 9,544 |
| 2015 | 22.4 | 10.4% | 9,140 |
| 2016 | 18.4 | 8.5% | 9,185 |
| 2017 | 26.6 | 12.4% | 9,331 |
| 2018 | 47.9 | 22.2% | 9,170 |
| 2019 | 66.9 | 31.1% | 9,060 |
| 2020 | 48.1 | 22.3% | 9,167 |
| 2021 | 69.7 | 32.4% | 9,233 |
| 2022 | 81.1 | 37.7% | 9,122 |
| 2023 | 63.9 | 29.6% | 9,213 |
| 2024 | 99 | 45.8% | 9,085 |
| 2025 | 125.8 | 58.4% | 9,092 |
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 | Natural Gas Internal Combustion Engine | IC | 4.1 | 4.1 | May 2002 | Operating | — | coming soon |
| 2 | Natural Gas Internal Combustion Engine | IC | 4.1 | 4.1 | May 2002 | Operating | — | coming soon |
| 3 | Natural Gas Internal Combustion Engine | IC | 4.1 | 4.1 | May 2002 | Operating | — | coming soon |
| 4 | Natural Gas Internal Combustion Engine | IC | 4.1 | 4.1 | May 2002 | Operating | — | coming soon |
| 5 | Natural Gas Internal Combustion Engine | IC | 4.1 | 4.1 | May 2002 | Operating | — | coming soon |
| 6 | Natural Gas Internal Combustion Engine | IC | 4.1 | 4.1 | May 2002 | Operating | — | coming soon |
Owner / operator
Operator: Avista Corp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Avista Corp | 100.0% | 25 MW |
Nearby plants
Within 80 km.
| Upriver Dam Hydro Plant | 18 MW | 13.9 km |
| Post Falls | 15 MW | 14.5 km |
| Northeast (WA) | 62 MW | 17.2 km |
| Rathdrum Power LLC | 302 MW | 19.6 km |
| Upper Falls | 10 MW | 20.9 km |
| Monroe Street | 15 MW | 21 km |