Headgate Rock
Headgate Rock is a 20 MW hydroelectric power plant in La Paz County, Arizona, operated by Colorado River Indian Irr Proj. EIA-860M lists 3 generating units here. Its units entered service in 1993.
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
- 19.5 MW
- 19.5 MW net summer
- Generating units
- 3
- In service
- 1993
- EIA plant ID
- 7179
Where it is
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- County
- La Paz County, Arizona
- Coordinates
- 34.1683, -114.2774
- Balancing authority
- WALC
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Colorado River Indian Irr Proj
- Primary energy source
- Hydro
- Technologies
- Conventional Hydroelectric
- Status
- Out of service but expected to return to service in next calendar year
Headgate Rock: FAQ
- Where is Headgate Rock?
- In La Paz 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 Headgate Rock?
- 20 MW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.
- Who owns Headgate Rock?
- EIA-860M names Colorado River Indian Irr Proj 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 Headgate Rock LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Colorado River Indian Irr Proj 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 "Headgate Rock LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Headgate Rock still running?
- EIA-860M files it as "Out of service but expected to return to service in next calendar year" for 2026-07. Statuses change monthly, and this page follows the monthly release.