Neil Simpson II
Campbell County, Wyoming · EIA plant ID 7504 · Operator: Black Hills Power, Inc. d/b/a
Nameplate130MWSummer 116 MW
Generators2in service
Net generation642GWh12 mo to Dec 2025
Capacity factor63%gas/coal/oil units, summer MW
Heat rate12,604Btu/kWhfossil units, electric fuel, HHV
First online1995Runs as baseload
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) |
|---|---|---|---|
| 2001 | 965.1 | — | — |
| 2002 | 878.4 | — | — |
| 2003 | 787.5 | 78.8% | 11,856 |
| 2004 | 693.5 | 69.3% | 11,782 |
| 2005 | 666.6 | 66.8% | 11,886 |
| 2006 | 740.8 | 74.2% | 11,927 |
| 2007 | 732.2 | 73.3% | 11,844 |
| 2008 | 725.4 | 72.4% | 12,055 |
| 2009 | 679.5 | 68.0% | 12,238 |
| 2010 | 703.7 | 70.5% | 12,120 |
| 2011 | 656.3 | 65.7% | 12,304 |
| 2012 | 585.3 | 58.5% | 12,117 |
| 2013 | 678.1 | 67.9% | 11,817 |
| 2014 | 578.9 | 58.0% | 12,482 |
| 2015 | 611.2 | 61.2% | 12,410 |
| 2016 | 609 | 60.8% | 12,376 |
| 2017 | 557.4 | 55.8% | 12,094 |
| 2018 | 664.4 | 66.5% | 12,252 |
| 2019 | 714.9 | 71.6% | 12,106 |
| 2020 | 725.2 | 72.4% | 12,396 |
| 2021 | 702 | 70.3% | 12,216 |
| 2022 | 663.9 | 66.5% | 12,216 |
| 2023 | 685.7 | 68.7% | 12,460 |
| 2024 | 660.9 | 66.0% | 12,743 |
| 2025 | 641.8 | 63.2% | 12,604 |
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 |
|---|---|---|---|---|---|---|---|---|
| 2 | Conventional Steam Coal | ST | 90 | 82 | Sep 1995 | Operating | — | coming soon |
| GT1 | Natural Gas Fired Combustion Turbine | GT | 40 | 34 | Jun 2000 | 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 Power, Inc. d/b/a | 100.0% | 130 MW |
Nearby plants
Within 80 km.
| Wygen 1 | 90 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 |