Box Canyon
Pend Oreille County, Washington · EIA plant ID 3891 · Operator: PUD No 1 of Pend Oreille County
Nameplate90MWSummer 90 MW
Generators4in service
Net generation460GWh12 mo to Dec 2025
Capacity factor58%hydro units, summer MW
Heat rate—thermal plants only
First online1955
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 | 363.3 | 54.0% | — |
| 2002 | 399.8 | 59.4% | — |
| 2003 | 435.3 | 64.7% | — |
| 2004 | 482.1 | 71.5% | — |
| 2005 | 446.6 | 66.4% | — |
| 2006 | 448.7 | 66.7% | — |
| 2007 | 453.6 | 67.4% | — |
| 2008 | 406.8 | 60.3% | — |
| 2009 | 438.9 | 65.2% | — |
| 2010 | 392.4 | 58.3% | — |
| 2011 | 403.7 | 60.0% | — |
| 2012 | 375.7 | 51.3% | — |
| 2013 | 415.1 | 54.7% | — |
| 2014 | 435 | 57.3% | — |
| 2015 | 507.2 | 64.3% | — |
| 2016 | 487.4 | 61.7% | — |
| 2017 | 352.7 | 44.7% | — |
| 2018 | 441.6 | 56.0% | — |
| 2019 | 460.8 | 58.5% | — |
| 2020 | 448.7 | 56.8% | — |
| 2021 | 475.1 | 60.3% | — |
| 2022 | 450.2 | 57.1% | — |
| 2023 | 383.5 | 48.6% | — |
| 2024 | 464.1 | 58.7% | — |
| 2025 | 459.8 | 58.3% | — |
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 | 22.5 | 22.5 | Jun 1955 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 22.5 | 22.5 | Jul 1955 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 22.5 | 22.5 | Aug 1955 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 22.5 | 22.5 | Aug 1955 | Operating | — | coming soon |
Owner / operator
Operator: PUD No 1 of Pend Oreille County. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| PUD No 1 of Pend Oreille County | 100.0% | 90 MW |
Nearby plants
Within 80 km.
| Boundary | 1,160 MW | 23.5 km |
| Sheep Creek Hydro | 2 MW | 33.2 km |
| Meyers Falls | 2 MW | 51.4 km |
| Kettle Falls Generating Station | 58 MW | 53.9 km |
| Smith Falls Hydro Project | 38 MW | 66 km |
| Albeni Falls | 42 MW | 73.6 km |