Nameplate capacity
1,428 MW
Rank in Colorado
#1
of 326 plants
In service since
1979
November 1979
Details
- Primary fuel
- Coal
- Technology
- Conventional Steam Coal
- Operator
- Tri-State G & T Assn, Inc
- County
- Moffat County
- Generating units
- 3
- Share of state capacity
- 6.22%
- Rank among coal plants in Colorado
- #1 of 5
- EIA plant code
- 6021
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 3 | Conventional Steam Coal | 535 MW | 448 MW | 1984 | Operating |
| 1 | Conventional Steam Coal | 446 MW | 427 MW | 1980 | Operating |
| 2 | Conventional Steam Coal | 446 MW | 410 MW | 1979 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Colorado
| Comanche (CO) | Coal | 1,253 MW |
| Fort St Vrain | Natural gas | 1,149 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 1,428 MW solar plant and a 1,428 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Colorado power plants · What Colorado actually generates