Ashton
Fremont County, Idaho · EIA plant ID 825 · Operator: PacifiCorp
Nameplate7MWSummer 7 MW
Generators3in service
Net generation28GWh12 mo to Dec 2025
Capacity factor45%hydro units, summer MW
Heat rate—thermal plants only
First online1917
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 | 33.8 | 53.6% | — |
| 2002 | 30.4 | 48.1% | — |
| 2003 | 29.1 | 46.1% | — |
| 2004 | 31.6 | 49.9% | — |
| 2005 | 31.7 | 50.2% | — |
| 2006 | 37.8 | 60.0% | — |
| 2007 | 30.9 | 49.0% | — |
| 2008 | 32.1 | 50.7% | — |
| 2009 | 33.7 | 53.5% | — |
| 2010 | 22.7 | 36.0% | — |
| 2011 | 18.1 | 28.6% | — |
| 2012 | 1.9 | 3.0% | — |
| 2013 | 34.5 | 54.8% | — |
| 2014 | 32.8 | 52.8% | — |
| 2015 | 30 | 48.2% | — |
| 2016 | 28.8 | 46.2% | — |
| 2017 | 36.9 | 59.3% | — |
| 2018 | 38.1 | 61.2% | — |
| 2019 | 39.6 | 63.7% | — |
| 2020 | 35.6 | 57.0% | — |
| 2021 | 29.8 | 48.0% | — |
| 2022 | 27.9 | 44.9% | — |
| 2023 | 30.2 | 48.5% | — |
| 2024 | 32.6 | 52.3% | — |
| 2025 | 28 | 45.0% | — |
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 | 2.7 | 2.7 | Jul 1917 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 2 | 2.2 | Jul 1925 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 2 | 2.2 | Jul 1925 | 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% | 7 MW |
Nearby plants
Within 80 km.
| Chester Diversion Hydroelectric Project | 4 MW | 9.6 km |
| Falls River Hydro | 9 MW | 11.7 km |
| Felt | 7 MW | 25.1 km |
| BYUI Central Energy Facility | 6 MW | 37.2 km |
| Island Park | 5 MW | 38.6 km |
| Meadow Creek Project Company | 120 MW | 66.4 km |