Pilot ButteOut of service
Fremont County, Wyoming · EIA plant ID 674 · Operator: U S Bureau of Reclamation
Nameplate2MWSummer 2 MW
Generators2in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—thermal plants only
First online1925
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), primary-fuel 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 | 4.8 | 34.2% | — |
| 2002 | 3.5 | 25.2% | — |
| 2003 | 2.2 | 15.9% | — |
| 2004 | 4.1 | 29.0% | — |
| 2005 | 4.4 | 31.4% | — |
| 2006 | 4.6 | 33.0% | — |
| 2007 | 3.6 | 25.4% | — |
| 2008 | 1.1 | 8.1% | — |
| 2009 | 20.7 | 147.4% | — |
| 2010 | -0 | -0.1% | — |
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 | 0.8 | 0.8 | Jan 1925 | Operating (Out of service) | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 0.8 | 0.8 | Feb 1929 | Operating (Out of service) | — | coming soon |
Owner / operator
Operator: U S Bureau of Reclamation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| U S Bureau of Reclamation | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Boysen | 15 MW | 54.1 km |
| Beaver Creek Gas Plant | 7 MW | 56.5 km |
| Big Sand Draw Plant | 8 MW | 72.2 km |