Fontenelle
Lincoln County, Wyoming · EIA plant ID 4185 · Operator: U S Bureau of Reclamation
Nameplate10MWSummer 11 MW
Generators1in service
Net generation44GWh12 mo to Dec 2025
Capacity factor45%hydro units, summer MW
Heat rate—thermal plants only
First online1968
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 | 25.1 | 25.6% | — |
| 2002 | 27.1 | 27.6% | — |
| 2003 | 42.1 | 42.9% | — |
| 2004 | 44.8 | 45.5% | — |
| 2005 | 67 | 68.3% | — |
| 2006 | 49.8 | 50.7% | — |
| 2007 | 39.7 | 40.4% | — |
| 2008 | 48.3 | 49.1% | — |
| 2009 | 52 | 53.0% | — |
| 2010 | 40.2 | 41.0% | — |
| 2011 | 60.6 | 61.7% | — |
| 2012 | 51.8 | 52.7% | — |
| 2013 | 37.5 | 38.2% | — |
| 2014 | 68.7 | 70.0% | — |
| 2015 | 67.9 | 69.2% | — |
| 2016 | 44.2 | 44.9% | — |
| 2017 | 48.4 | 49.3% | — |
| 2018 | 66.6 | 67.9% | — |
| 2019 | 56.9 | 58.0% | — |
| 2020 | 64.8 | 65.9% | — |
| 2021 | 34.1 | 34.7% | — |
| 2022 | 44.1 | 44.9% | — |
| 2023 | 63.7 | 64.9% | — |
| 2024 | 53.3 | 54.1% | — |
| 2025 | 43.8 | 44.6% | — |
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 | 11.2 | May 1968 | Operating | — | 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% | 10 MW |
Nearby plants
Within 80 km.
| Shute Creek Facility | 144 MW | 16.4 km |
| Genesis Alkali | 41 MW | 49.7 km |
| Naughton | 707 MW | 53.4 km |
| Sweetwater Solar | 92 MW | 54.3 km |
| Kemmerer Unit 1 | — | 54.4 km |
| General Chemical | 30 MW | 54.6 km |