Demoss Petrie
Natural gas power plant in Pima County, Arizona. 85 MW of nameplate capacity across 1 generator, operated by Tucson Electric Power Co.
Also known as Demoss Petrie Power Plant · EIA plant 124
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Key facts
- Capacity
- 85 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- June 2001First generator online
- Operator
- Tucson Electric Power CoEIA operator ID 24211
- Grid
- TEPCBalancing authority TEPC
- Price nodes
- None linkedNo verified ISO node
- Location
- Pima County, AZ32.2523, −110.9921
- EIA plant ID
- 124EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Demoss Petrie produces
Free · EIA-923Net generation, 2025
2.07 GWh
2,071 MWh, final
Capacity factor, 2025
0.3%
2024: 0.3%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
0.7–16.3
GWh a year. Low 2021, high 2019
| 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 | 53,339 | Not reported | 12 of 12 |
| 2003 | 35,178 | Not reported | 12 of 12 |
| 2004 | 23,055 | Not reported | 12 of 12 |
| 2005 | 18,762 | Not reported | 12 of 12 |
| 2006 | 16,613 | Not reported | 12 of 12 |
| 2007 | 17,916 | Not reported | 12 of 12 |
| 2008 | 10,143 | Not reported | 12 of 12 |
| 2009 | 4,064 | Not reported | 12 of 12 |
| 2010 | 6,585 | 0.9% | 12 of 12 |
| 2011 | 3,072 | 0.4% | 12 of 12 |
| 2012 | 5,488 | 0.7% | 12 of 12 |
| 2013 | 7,038 | 0.9% | 12 of 12 |
| 2014 | 5,566 | 0.7% | 12 of 12 |
| 2015 | 4,608 | 0.6% | 12 of 12 |
| 2016 | 5,324 | 0.7% | 12 of 12 |
| 2017 | 9,358 | 1.3% | 12 of 12 |
| 2018 | 5,154 | 0.7% | 12 of 12 |
| 2019 | 16,300 | 2.2% | 12 of 12 |
| 2020 | 1,260 | 0.2% | 12 of 12 |
| 2021 | 735 | 0.1% | 12 of 12 |
| 2022 | 843 | 0.1% | 12 of 12 |
| 2023 | 1,310 | 0.2% | 12 of 12 |
| 2024 | 2,469 | 0.3% | 12 of 12 |
| 2025 | 2,071 | 0.3% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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
1,701
US short tons. 2024: 2,020
SO₂, 2025
0
US short tons
NOx, 2025
1
US short tons
CO₂ per MWh, calculated
0.82 t
About 1,643 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (GT1), matched to EIA plant 124 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, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GT2 | Natural Gas Fired Combustion Turbine | 85.0 | June 2001 |
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 Tucson Electric Power Co 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 Demoss Petrie
More plants operated by Tucson Electric Power Co
Questions about Demoss Petrie
How much power does Demoss Petrie produce?
Demoss Petrie reported 2,071 MWh (2.07 GWh) of net generation in 2025, a 0.3% capacity factor on 85 MW of nameplate capacity.
Where is Demoss Petrie?
Demoss Petrie is in Pima County, Arizona, at 32.2523, −110.9921. It is in the Tucson Electric Power Company balancing area (TEPC).
Who operates Demoss Petrie?
EIA-860M for August 2026 lists Tucson Electric Power Co as the operator (EIA operator ID 24211). The operator is not always the owner.
When did Demoss Petrie start operating?
Its first generator began operating in June 2001, 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
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page