Rocky Mountain Energy Center
Natural gas power plant in Weld County, Colorado. 685.1 MW of nameplate capacity across 3 generators, operated by Public Service Co of Colorado.
Also known as EIA plant 55835
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Key facts
- Capacity
- 685.1 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- May 2004First generator online
- Operator
- Public Service Co of ColoradoEIA operator ID 15466
- Grid
- PSCOBalancing authority PSCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Weld County, CO40.0908, −104.5953
- EIA plant ID
- 55835EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Rocky Mountain produces
Free · EIA-923Net generation, 2025
2.43 TWh
2,434,967 MWh, final
Capacity factor, 2025
40.6%
2024: 48.7%
January to July 2026
1.69 TWh
Provisional
Range, 2015 to 2025
1.8–3.0
TWh a year. Low 2015, high 2020
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | 2,095,895 | Not reported | 8 of 12 |
| 2005 | 3,155,781 | Not reported | 12 of 12 |
| 2006 | 2,899,884 | Not reported | 12 of 12 |
| 2007 | 3,220,560 | Not reported | 12 of 12 |
| 2008 | 3,383,043 | Not reported | 12 of 12 |
| 2009 | 3,562,922 | Not reported | 12 of 12 |
| 2010 | 2,908,574 | 47.1% | 12 of 12 |
| 2011 | 2,665,042 | Not reported | 12 of 12 |
| 2012 | 2,451,436 | 40.7% | 12 of 12 |
| 2013 | 1,776,958 | Not reported | 12 of 12 |
| 2014 | 2,452,794 | 40.9% | 12 of 12 |
| 2015 | 1,848,027 | 30.8% | 12 of 12 |
| 2016 | 1,860,525 | 30.9% | 12 of 12 |
| 2017 | 1,975,431 | 32.9% | 12 of 12 |
| 2018 | 2,315,659 | 38.6% | 12 of 12 |
| 2019 | 2,531,682 | 42.2% | 12 of 12 |
| 2020 | 3,039,709 | 50.5% | 12 of 12 |
| 2021 | 1,985,744 | 33.1% | 12 of 12 |
| 2022 | 2,540,676 | 42.3% | 12 of 12 |
| 2023 | 2,384,575 | 39.7% | 12 of 12 |
| 2024 | 2,933,447 | 48.7% | 12 of 12 |
| 2025 | 2,434,967 | 40.6% | 12 of 12 |
| 2026 (provisional, partial year) | 1,688,423 | 48.4% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDCO₂, 2025
1.19M
US short tons. 2024: 1.42M
SO₂, 2025
6
US short tons
NOx, 2025
93
US short tons
CO₂ per MWh, calculated
0.49 t
About 978 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (1, 2), matched to EIA plant 55835 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
640
million gallons
Consumption, 2024
640
million gallons
Source
Wells
Surface, Fresh. Induced-draft tower
Watershed stress
High · 0.691
USGS SUI, HUC12 Jim Creek-Box Elder Creek
12 of 12 cooling months report withdrawal. SUI of the HUC12 containing the plant. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | 175.1 | May 2004 |
| CTG2 | Natural Gas Fired Combined Cycle | 175.1 | May 2004 |
| STG1 | Natural Gas Fired Combined Cycle | 334.9 | May 2004 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Public Service Co of Colorado as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Rocky Mountain
More plants operated by Public Service Co of Colorado
Questions about Rocky Mountain
How much power does Rocky Mountain Energy Center produce?
Rocky Mountain Energy Center reported 2,434,967 MWh (2.43 TWh) of net generation in 2025, a 40.6% capacity factor on 685.1 MW of nameplate capacity. From January to July 2026 it reported 1.69 TWh, which is provisional.
Where is Rocky Mountain Energy Center?
Rocky Mountain Energy Center is in Weld County, Colorado, at 40.0908, −104.5953. It is in the Public Service Company of Colorado balancing area (PSCO).
Who operates Rocky Mountain Energy Center?
EIA-860M for August 2026 lists Public Service Co of Colorado as the operator (EIA operator ID 15466). The operator is not always the owner.
When did Rocky Mountain Energy Center start operating?
Its first generator began operating in May 2004, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page