Miles City GT
Custer County, Montana · EIA plant ID 2177 · Operator: Montana-Dakota Utilities Co
Nameplate23MWSummer 24 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor1%gas/coal/oil units, summer MW
Heat rate15,819Btu/kWhfossil units, electric fuel, HHV
First online1972Runs as rarely runs
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 | 2.2 | 1.0% | 17,436 |
| 2002 | 1.6 | 0.8% | 17,948 |
| 2003 | 2.2 | 1.0% | 18,151 |
| 2004 | 3.3 | 1.7% | 18,468 |
| 2005 | 1.9 | 1.0% | 19,924 |
| 2006 | 1.6 | 0.8% | 20,111 |
| 2007 | 2.6 | 1.3% | 19,197 |
| 2008 | 0.4 | 0.2% | 22,062 |
| 2009 | -0 | -0.0% | — |
| 2010 | 1 | 0.5% | 18,873 |
| 2011 | 0.2 | 0.1% | 23,174 |
| 2012 | 1.6 | 0.8% | 18,486 |
| 2013 | -0.1 | -0.0% | — |
| 2014 | 0.4 | 0.2% | 23,140 |
| 2015 | 0.4 | 0.2% | 21,937 |
| 2016 | 0.7 | 0.3% | 20,633 |
| 2017 | 0.4 | 0.2% | 19,552 |
| 2018 | 0.2 | 0.1% | 29,647 |
| 2019 | 0.2 | 0.1% | 27,326 |
| 2020 | 0.2 | 0.1% | 25,210 |
| 2021 | 2.9 | 1.4% | 15,765 |
| 2022 | 0.5 | 0.2% | 20,634 |
| 2023 | 0.2 | 0.1% | 28,470 |
| 2024 | 0.3 | 0.2% | 24,009 |
| 2025 | 2.4 | 1.2% | 15,819 |
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 mo365 MMBtu
Last month with liquid burnDec 2025
Switch while operatingNo
Net summer MW on gas23
Net summer MW on oil21
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbine | GT | 23.3 | 23.6 | May 1972 | Operating | — | coming soon |
Owner / operator
Operator: Montana-Dakota Utilities Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Montana-Dakota Utilities Co | 100.0% | 23 MW |
Nearby plants
Within 80 km.
| Clearwater Wind East | 208 MW | 44.9 km |
| Clearwater Wind III | 100 MW | 54.6 km |
| Clearwater Wind II | 103 MW | 54.6 km |
| Clearwater Wind I | 366 MW | 63.5 km |