Michell Butte Power Project
Malheur County, Oregon · EIA plant ID 50360 · Operator: Owyhee Irrigation District
Nameplate2MWSummer 2 MW
Generators2in service
Net generation7GWh12 mo to Dec 2025
Capacity factor38%hydro units, summer MW
Heat rate—thermal plants only
First online1989
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 | 6.5 | 43.1% | — |
| 2002 | 6.2 | 48.1% | — |
| 2003 | 2 | 28.9% | — |
| 2004 | 6 | 87.0% | — |
| 2005 | 5.7 | 83.7% | — |
| 2007 | 5.9 | 37.5% | — |
| 2008 | 6.5 | 41.4% | — |
| 2009 | 5.3 | 33.7% | — |
| 2010 | 5.4 | 34.2% | — |
| 2011 | 6.3 | 39.9% | — |
| 2012 | 4.9 | 31.1% | — |
| 2013 | 2.2 | 14.0% | — |
| 2014 | 0.1 | 0.6% | — |
| 2015 | 1.1 | 6.8% | — |
| 2016 | 3.9 | 24.7% | — |
| 2017 | 7.4 | 46.7% | — |
| 2018 | 4.9 | 31.2% | — |
| 2019 | 6.7 | 42.6% | — |
| 2020 | 6.2 | 39.5% | — |
| 2021 | 3.5 | 21.9% | — |
| 2022 | 2.7 | 16.9% | — |
| 2023 | 4.4 | 49.9% | — |
| 2024 | 5.3 | 30.0% | — |
| 2025 | 6.6 | 37.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | HY | 1 | 1 | May 1989 | Operating | — | coming soon |
| GEN2 | Conventional Hydroelectric | HY | 1 | 1 | May 1989 | Operating | — | coming soon |
Owner / operator
Operator: Owyhee Irrigation District. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Owyhee Irrigation District | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Open Range Solar Center, LLC | 10 MW | 7.7 km |
| Tunnel 1 Power Project | 9 MW | 15.7 km |
| Owyhee Dam Power Project | 5 MW | 16.1 km |
| Morgan Solar Center | 3 MW | 21 km |
| Thunderegg Solar Center, LLC | 10 MW | 22.2 km |
| Vale Air Solar Center, LLC | 10 MW | 23 km |