Wygen 1
Campbell County, Wyoming · EIA plant ID 55479 · Operator: Black Hills Power, Inc. d/b/a
Nameplate90MWSummer 85 MW
Generators1in service
Net generation583GWh12 mo to Aug 2026
Capacity factor78%gas/coal/oil units, summer MW
Heat rate12,038Btu/kWhfossil units, electric fuel, HHV
First online2003Runs as baseload
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), gas/coal/oil 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) |
|---|---|---|---|
| 2003 | 616.8 | 100.6% | 18,219 |
| 2004 | 740.6 | 120.4% | 11,378 |
| 2005 | 709.1 | 115.6% | 11,506 |
| 2006 | 714.8 | 116.6% | 11,486 |
| 2007 | 705.4 | 115.0% | 11,762 |
| 2008 | 702.6 | 114.3% | 11,688 |
| 2009 | 719.1 | 117.3% | 11,777 |
| 2010 | 639.9 | 104.4% | 11,711 |
| 2011 | 719.7 | 117.4% | 11,810 |
| 2012 | 684.7 | 111.3% | 11,742 |
| 2013 | 705.3 | 115.0% | 11,705 |
| 2014 | 705.4 | 115.0% | 11,898 |
| 2015 | 734.6 | 98.7% | 11,655 |
| 2016 | 710.5 | 95.2% | 11,831 |
| 2017 | 721.8 | 96.9% | 11,846 |
| 2018 | 639.5 | 85.9% | 11,907 |
| 2019 | 703.4 | 94.5% | 12,116 |
| 2020 | 699 | 93.6% | 12,226 |
| 2021 | 521.5 | 70.0% | 12,204 |
| 2022 | 688.6 | 92.5% | 12,095 |
| 2023 | 643.2 | 86.4% | 12,237 |
| 2024 | 556.4 | 74.5% | 12,132 |
| 2025 | 538.7 | 72.4% | 12,262 |
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 Steam Coal | ST | 90 | 85 | Jan 2003 | Operating | — | coming soon |
Owner / operator
Operator: Black Hills Power, Inc. d/b/a. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Black Hills Wyoming Inc | 76.5% | 69 MW |
| Municipal Energy Agency of NE | 23.5% | 21 MW |
Nearby plants
Within 80 km.
| Neil Simpson II | 130 MW | 0 km |
| Neil Simpson Gas Turbine #2 | 40 MW | 0.4 km |
| Wyodak | 362 MW | 0.5 km |
| Wygen 2 | 95 MW | 0.7 km |
| Wygen III | 116 MW | 0.7 km |
| Dry Fork Station | 484 MW | 13 km |