Harquahala Generating Project
Harquahala Generating Project is a 1 GW natural gas power plant in Maricopa County, Arizona, operated by New Harquahala Generating Co, LLC. EIA-860M lists 6 generating units here. Its units entered service in 2004.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 1,277.1 MW
- 1,042.9 MW net summer
- Generating units
- 6
- In service
- 2004
- EIA plant ID
- 55372
Where it is
Loading map…
- County
- Maricopa County, Arizona
- Coordinates
- 33.476, -113.1134
- Balancing authority
- SRP
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- New Harquahala Generating Co, LLC
- Primary energy source
- Natural gas
- Technologies
- Natural Gas Fired Combined Cycle
- Status
- Operating
Every plant New Harquahala Generating Co, LLC reports to EIA →
Harquahala Generating Project: FAQ
- Where is Harquahala Generating Project?
- In Maricopa County, Arizona (AZ). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Harquahala Generating Project?
- 1 GW of nameplate capacity across 6 units, as of the EIA-860M release for 2026-07.
- Who owns Harquahala Generating Project?
- EIA-860M names New Harquahala Generating Co, LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Harquahala Generating Project LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — New Harquahala Generating Co, LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Harquahala Generating Project LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Harquahala Generating Project still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.