Simplot Phosphates
Sweetwater County, Wyoming · EIA plant ID 54472 · Operator: Simplot Phosphates LLC
Nameplate12MWSummer 12 MW
Generators1in service
Net generation102GWh12 mo to Aug 2026
Capacity factor93%other units, summer MW
Heat rate4,090Btu/kWhfossil units, electric fuel, HHV
First online1986
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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), other 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 107.9 | — | — |
| 2002 | 83 | — | 10,309 |
| 2004 | 106.7 | 105.6% | — |
| 2005 | 65.1 | 64.6% | — |
| 2006 | 49 | 48.7% | 9,991 |
| 2007 | 78.7 | 68.5% | 10,000 |
| 2008 | 73.4 | 66.7% | 10,000 |
| 2009 | 66.2 | 59.2% | 10,000 |
| 2010 | 72 | 67.4% | 10,000 |
| 2011 | 66.3 | 61.7% | 10,000 |
| 2012 | 77 | 66.3% | 10,000 |
| 2013 | 76.2 | 68.8% | 10,000 |
| 2014 | 78.5 | 73.5% | 10,000 |
| 2015 | 83 | 77.2% | 10,000 |
| 2016 | 71.1 | 64.4% | 4,090 |
| 2017 | 53.7 | 45.6% | 4,090 |
| 2018 | 89 | 84.6% | 4,091 |
| 2019 | 80.7 | 74.9% | 4,090 |
| 2020 | 83.4 | 78.0% | 4,090 |
| 2021 | 87.7 | 83.4% | 4,090 |
| 2022 | 88.3 | 75.3% | 4,090 |
| 2023 | 91.2 | 83.6% | 4,090 |
| 2024 | 98.7 | 89.0% | 4,090 |
| 2025 | 99.2 | 84.7% | 4,090 |
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 | All Other | ST | 11.5 | 11.5 | Aug 1986 | Operating | — | coming soon |
Owner / operator
Operator: Simplot Phosphates LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Simplot Phosphates LLC | 100.0% | 12 MW |
Nearby plants
Within 80 km.
| Jim Bridger | 2,326 MW | 36 km |
| Sweetwater Solar | 92 MW | 46.8 km |
| General Chemical | 30 MW | 52 km |
| Genesis Alkali | 41 MW | 57.2 km |
| Flaming Gorge | 152 MW | 73.8 km |