Box Canyon Dam
Siskiyou County, California · EIA plant ID 50179 · Operator: Siskiyou Power Authority
Nameplate5MWSummer 5 MW
Generators2in service
Net generation23GWh12 mo to Dec 2025
Capacity factor51%hydro units, summer MW
Heat rate—thermal plants only
First online1986
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 | 14.7 | 35.1% | — |
| 2002 | 18.8 | 45.0% | — |
| 2003 | 27 | 64.8% | — |
| 2004 | 20.9 | 49.9% | — |
| 2005 | 23.7 | 56.8% | — |
| 2006 | 25.6 | 61.3% | — |
| 2007 | 11.8 | 28.0% | — |
| 2008 | 11.5 | 27.3% | — |
| 2009 | 14 | 33.4% | — |
| 2010 | 23.7 | 54.0% | — |
| 2011 | 26 | 59.4% | — |
| 2012 | 15.6 | 35.5% | — |
| 2013 | 10.8 | 24.7% | — |
| 2014 | 8.2 | 18.7% | — |
| 2015 | 9.8 | 22.4% | — |
| 2016 | 23.9 | 54.4% | — |
| 2017 | 25.3 | 57.8% | — |
| 2018 | 8.8 | 20.0% | — |
| 2019 | 20.9 | 47.8% | — |
| 2020 | 7.8 | 17.7% | — |
| 2021 | 5.1 | 11.7% | — |
| 2022 | 6.1 | 14.0% | — |
| 2023 | 17.3 | 39.5% | — |
| 2024 | 22.6 | 51.5% | — |
| 2025 | 22.5 | 51.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | HY | 2.5 | 2.5 | Jun 1986 | Operating | — | coming soon |
| GEN2 | Conventional Hydroelectric | HY | 2.5 | 2.5 | Jun 1986 | Operating | — | coming soon |
Owner / operator
Operator: Siskiyou Power Authority. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Siskiyou Power Authority | 100.0% | 5 MW |
Nearby plants
Within 80 km.
| Roseburg Forest Products Biomass | 13 MW | 17.8 km |
| Slate Creek | 4 MW | 35.3 km |
| James B Black | 169 MW | 43.6 km |
| Pit 5 | 142 MW | 43.9 km |
| Nelson Creek | 1 MW | 46 km |
| Pit 6 | 79 MW | 48.6 km |