Oneida
Franklin County, Idaho · EIA plant ID 829 · Operator: PacifiCorp
Nameplate30MWSummer 28 MW
Generators3in service
Net generation39GWh12 mo to Dec 2025
Capacity factor16%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 | 37.3 | 15.3% | — |
| 2002 | 27.9 | 11.4% | — |
| 2003 | 22.1 | 9.0% | — |
| 2004 | 18.4 | 7.5% | — |
| 2005 | 38.8 | 15.9% | — |
| 2006 | 44.9 | 18.4% | — |
| 2007 | 36.9 | 15.1% | — |
| 2008 | 34.6 | 14.1% | — |
| 2009 | 33.1 | 13.5% | — |
| 2010 | 28.3 | 11.6% | — |
| 2011 | 77.3 | 31.6% | — |
| 2012 | 33 | 13.5% | — |
| 2013 | 28.2 | 11.5% | — |
| 2014 | 21.7 | 8.9% | — |
| 2015 | 28.9 | 11.8% | — |
| 2016 | 39.9 | 16.3% | — |
| 2017 | 94.1 | 38.5% | — |
| 2018 | 61.9 | 25.3% | — |
| 2019 | 51.3 | 21.0% | — |
| 2020 | 49.9 | 20.4% | — |
| 2021 | 27.4 | 11.2% | — |
| 2022 | 26.2 | 10.7% | — |
| 2023 | 42.4 | 17.3% | — |
| 2024 | 42 | 17.1% | — |
| 2025 | 39.4 | 16.1% | — |
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 | 10 | 9.3 | Jul 1915 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 10 | 9.3 | Jul 1916 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 10 | 9.3 | Jul 1920 | Operating | — | coming soon |
Owner / operator
Operator: PacifiCorp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| PacifiCorp | 100.0% | 30 MW |
Nearby plants
Within 80 km.
| Mink Creek Hydro | 3 MW | 6.9 km |
| Grace | 33 MW | 30.1 km |
| Last Chance | 2 MW | 37.5 km |
| Soda | 15 MW | 42.1 km |
| Marsh Valley Development | 2 MW | 51.7 km |
| Cutler Hydro | 30 MW | 54.3 km |