Rocky Mountain Energy Center
Natural gas power plant · Weld County, Colorado
Nameplate capacity
685 MW
Rank in Colorado
#6
of 326 plants
In service since
2004
May 2004
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Public Service Co of Colorado
- County
- Weld County
- Generating units
- 3
- Share of state capacity
- 2.99%
- Rank among natural gas plants in Colorado
- #3 of 30
- EIA plant code
- 55835
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| STG1 | Natural Gas Fired Combined Cycle | 335 MW | 300 MW | 2004 | Operating |
| CTG1 | Natural Gas Fired Combined Cycle | 175 MW | 146 MW | 2004 | Operating |
| CTG2 | Natural Gas Fired Combined Cycle | 175 MW | 146 MW | 2004 | 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
| Cherokee | Natural gas | 1,006 MW |
| Rawhide | Coal | 800 MW |
| Rush Creek Wind | Wind | 600 MW |
| Front Range Power Plant | Natural gas | 554 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 685 MW solar plant and a 685 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