Long Lake
Lincoln County, Washington · EIA plant ID 3867 · Operator: Avista Corp
Nameplate70MWSummer 90 MW
Generators4in service
Net generation435GWh12 mo to Dec 2025
Capacity factor56%hydro units, summer MW
Heat rate—thermal plants only
First online1915
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 | 369.3 | 46.6% | — |
| 2002 | 511 | 64.5% | — |
| 2003 | 465.2 | 58.8% | — |
| 2004 | 510.7 | 64.3% | — |
| 2005 | 459.9 | 58.1% | — |
| 2006 | 553.3 | 69.9% | — |
| 2007 | 471.4 | 59.5% | — |
| 2008 | 496.8 | 63.2% | — |
| 2009 | 487.1 | 62.1% | — |
| 2010 | 479.7 | 61.2% | — |
| 2011 | 555.6 | 70.9% | — |
| 2012 | 513.5 | 65.3% | — |
| 2013 | 504.8 | 64.4% | — |
| 2014 | 476.4 | 60.8% | — |
| 2015 | 394.4 | 50.3% | — |
| 2016 | 525.3 | 66.8% | — |
| 2017 | 508.3 | 64.8% | — |
| 2018 | 505.1 | 64.4% | — |
| 2019 | 438.5 | 55.9% | — |
| 2020 | 502.7 | 63.9% | — |
| 2021 | 478 | 61.0% | — |
| 2022 | 494.4 | 63.1% | — |
| 2023 | 413 | 52.7% | — |
| 2024 | 456.2 | 58.0% | — |
| 2025 | 435.4 | 55.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 17.5 | 22.4 | Oct 1915 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 17.5 | 22.5 | Oct 1915 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 17.5 | 22.5 | Dec 1919 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 17.5 | 22.1 | Feb 1924 | 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% | 70 MW |
Nearby plants
Within 80 km.
| Little Falls (WA) | 43 MW | 6.2 km |
| Nine Mile | 38 MW | 23.5 km |
| Spokane Waste to Energy | 26 MW | 33.9 km |
| Northeast (WA) | 62 MW | 36.5 km |
| Monroe Street | 15 MW | 37 km |
| Upper Falls | 10 MW | 37.1 km |