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- Combustion
- Loads
- In development
- Under construction
- Operating
- Size not stated
- 10 · 100 · 1,000 MW
Map
- Combustion
- Loads
- In development
- Under construction
- Operating
- Size not stated
Ocotillo: location and 15 exact-grade projects within 25 km. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Ocotillo
Power plant · Gas, combustion turbine
Key facts
Power plant · Gas, combustion turbineran 6% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1972
- Net generation, 2025
- 443,322 MWh
- Grid
- 69 kV to Arizona Public Service Co (AZPS)
- Location
- Maricopa County, Arizona
- Operated by
- Arizona Public Service Co
Output
- Gas
- Oil
Details
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- Technology
- Gas, combustion turbine source: “Natural Gas Fired Combustion Turbine”
- Age
- 54 years since 1972
- Unused energy
- 6,619 GWh 2025Unused energyA lead, not a guarantee: MW × hours × (1 − capacity factor) for the latest year (EIA-923), gas, coal and oil plants only. Air-permit run-hour caps, heat rate (cost to run) and capacity-market or reliability obligations can rule it out.
- Heat rate
- 9,491 Btu/kWh 2025
All 7 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Gem |
|
| EPA greenhouse gas reporting (GHGRP) |
|
| Fuel burned (MMBtu), 2025 | 4,207,521 |
| Capacity factor, 2025 | 0.063 |
| Heat rate (Btu/kWh), 2025 | 9,490.9 |
| Net generation (MWh), 2025 | 443,322 |
| Balancing authority code | AZPS |
Retirement
EIA-860M September 2026StatusSome generators have retired; the rest of the plant is still in service. As of EIA-860M for September 2026.- Capacity retired
- 227.8 MW
- Generators retired
- 5
- Capacity still in service
- 806.2 MW
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| PV1 | Solar Photovoltaic | 0.1 MW | Retired | July 2015 |
| PV2 | Solar Photovoltaic | 0.1 MW | Retired | July 2015 |
| PVM | Solar Photovoltaic | 0.4 MW | Retired | July 2015 |
| 1 | Natural Gas Steam Turbine | 113.6 MW | Retired | January 2019 |
| 2 | Natural Gas Steam Turbine | 113.6 MW | Retired | January 2019 |
By technology
| Technology | Retired | Scheduled to retire |
|---|---|---|
| Natural Gas Steam Turbine | 227.2 MW | |
| Solar Photovoltaic | 0.6 MW |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 69 kV
- Transmission or distribution system owner
- Arizona Public Service Co
- Balancing authority
- Arizona Public Service Company
- NERC region
- WECC
Transmission lines within 25 km (10)
Can the connection be reused?
A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.
Ownership
2 companies2| Company | Role | Share | As of | Source |
|---|---|---|---|---|
| Arizona Public Service Co | Operator | EIA-860M | ||
| PINNACLE WEST CAPITAL CORP | Owner | 100.0% | 31 Dec 2023 | EPA GHGRP |
Timeline
- Stated Units 1, 2 scheduled to retire, 227.2 MW · EIA-860M
- Stated Units PV1, PV2, PVM scheduled to retire, 0.6 MW · EIA-860M
- In service · EIA-860M
Sources
6 sourcesSources EIA-860M · GEM · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Sources
- EIA-860M Preliminary Monthly Electric Generator Inventory
- Global Energy Monitor — Global Integrated Power Tracker (unit-level power plants, eight technologies, all statuses)Global Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
- LBNL — A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024 (OEDI submission 8742)Yin, Nait Belaid & Heleno (2026), Lawrence Berkeley National Laboratory, OEDI, CC BY 4.0: A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024. Modified by Inframation: HIFLD-side fields only, names re-cased, coordinates rounded.
- EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Around this plant
Nearby
within 25 km| Project | Kind | Away | MW |
|---|---|---|---|
| AMERICAN AIRLINES - PHX DATA CENTER BLDG 1920 Under construction | Large load | 5.2 km | |
| Iron Mountain Data Center Under construction | Large load | 6.9 km | |
| PHOENIX DATA CENTER Built | Large load | 7.1 km | |
| Stack Data Center Filed | Large load | 8.9 km | |
| MCDOWELL ROAD DATA CENTER Built | Large load | 8.9 km | |
| QTS 40th Street Filed | Large load | 9.1 km | |
| Thistle Data Center Crane Filed | Large load | 13.9 km | |
| CPUS WEST FRYE ROAD, LP Built | Large load | 14.0 km | |
| DIGITAL REALTY TRUST CHANDLER Built | Large load | 16.6 km | |
| CYRUSONE - CHANDLER Built | Large load | 16.6 km | |
| ALIGNED PHX-04 DATA CENTER Under construction | Large load | 17.1 km | |
| PHX06 Data Center Filed | Large load | 17.5 km | |
| RED HAWK PH 3 (Mesa data centre) Filed | Large load | 23.3 km | |
| 11:11 Data Center Filed | Large load | 23.3 km | |
| NTT PH 5 Filed | Large load | 24.3 km |
Sources EPA ICIS-NPDES · FAA OE/AAA · EPA ICIS-Air