Spindle Hill Energy Center
Weld County, Colorado · EIA plant ID 56445 · Operator: Invenergy Services LLC
Nameplate420MWSummer 270 MW
Generators2in service
Net generation250GWh12 mo to Aug 2026
Capacity factor11%gas/coal/oil units, summer MW
Heat rate11,424Btu/kWhfossil units, electric fuel, HHV
First online2007Runs as intermediate
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) |
|---|---|---|---|
| 2007 | 506.5 | 31.9% | 11,100 |
| 2008 | 177.7 | 7.5% | 11,512 |
| 2009 | 944 | 39.9% | 11,078 |
| 2010 | 568.9 | 24.1% | 11,345 |
| 2011 | 423.6 | 17.9% | 10,875 |
| 2012 | 288.1 | 12.2% | 10,930 |
| 2013 | 514.8 | 21.8% | 11,273 |
| 2014 | 247 | 10.4% | 11,289 |
| 2015 | 184.3 | 7.8% | 10,887 |
| 2016 | 57.1 | 2.4% | 11,227 |
| 2017 | 122.2 | 5.2% | 11,565 |
| 2018 | 331.5 | 14.0% | 11,267 |
| 2019 | 270.2 | 11.4% | 11,296 |
| 2020 | 426.2 | 18.0% | 11,205 |
| 2021 | 238 | 10.1% | 11,570 |
| 2022 | 322.5 | 13.6% | 11,631 |
| 2023 | 252.7 | 10.7% | 11,308 |
| 2024 | 472.2 | 19.9% | 11,400 |
| 2025 | 705.4 | 29.8% | 11,331 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo42,566 MMBtu
Last month with liquid burnFeb 2026
Switch while operatingNo
Net summer MW on gas270
Net summer MW on oil286
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)
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 | Natural Gas Fired Combustion Turbine | GT | 210 | 135 | May 2007 | Operating | — | coming soon |
| GEN2 | Natural Gas Fired Combustion Turbine | GT | 210 | 135 | May 2007 | Operating | — | coming soon |
Owner / operator
Operator: Invenergy Services LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Invenergy Services LLC | 100.0% | 420 MW |
Nearby plants
Within 80 km.
| Spindle BESS | — | 1.1 km |
| Fort Lupton | 101 MW | 7.8 km |
| Frederick Battery Storage | 8 MW | 8.3 km |
| I25 Battery Storage | 4 MW | 9.3 km |
| JM Shafer Generating Station | 397 MW | 9.7 km |
| SR Jenkins Ft Lupton | 13 MW | 12.1 km |