Milner Hydro
Cassia County, Idaho · EIA plant ID 7190 · Operator: Idaho Power Co
Nameplate60MWSummer 45 MW
Generators3in service
Net generation34GWh12 mo to Dec 2025
Capacity factor8%hydro units, summer MW
Heat rate—thermal plants only
First online1992
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 | 30.4 | 6.2% | — |
| 2002 | 25 | 5.1% | — |
| 2003 | 17.6 | 23.4% | — |
| 2004 | 19.4 | 25.7% | — |
| 2005 | 35.7 | 47.4% | — |
| 2006 | 139 | 184.5% | — |
| 2007 | 66.9 | 88.8% | — |
| 2008 | 52.5 | 69.6% | — |
| 2009 | 162.7 | 30.4% | — |
| 2010 | 91.7 | 17.1% | — |
| 2011 | 435.5 | 81.4% | — |
| 2012 | 175.2 | 32.6% | — |
| 2013 | 52.8 | 9.9% | — |
| 2014 | 53.5 | 10.0% | — |
| 2015 | 70.8 | 13.2% | — |
| 2016 | 27.5 | 5.1% | — |
| 2017 | 237.5 | 44.4% | — |
| 2018 | 294.5 | 55.0% | — |
| 2019 | 157.2 | 29.4% | — |
| 2020 | 127.6 | 23.8% | — |
| 2021 | 34.7 | 8.8% | — |
| 2022 | 13.2 | 2.6% | — |
| 2023 | 29 | 9.4% | — |
| 2024 | 98.7 | 23.3% | — |
| 2025 | 33.7 | 8.5% | — |
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 | 46.6 | 38 | Dec 1992 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 12.1 | 7.1 | Sep 1992 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 0.8 | 0.3 | Sep 1992 | Operating | — | coming soon |
Owner / operator
Operator: Idaho Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Idaho Power Co | 100.0% | 60 MW |
Nearby plants
Within 80 km.
| Bypass | 10 MW | 4.1 km |
| S E Hazelton A | 9 MW | 7.1 km |
| Milner Butte LFGE | 4 MW | 7.2 km |
| Milner Dam Wind Park LLC | 20 MW | 7.5 km |
| Hazelton B Hydro | 8 MW | 9.8 km |
| Burley Butte Windpark | 21 MW | 9.9 km |