In Larimer County, Colorado (CO). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

95 MW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.

EIA-860M names U S Bureau of Reclamation 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 Flatiron LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — U S Bureau of Reclamation 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 "Flatiron LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Flatiron still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Flatiron

Flatiron is a 95 MW hydroelectric power plant in Larimer County, Colorado, operated by U S Bureau of Reclamation. EIA-860M lists 3 generating units here. Its units entered service in 1954.

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: 94.5 MW; 94.5 MW net summer
Generating units: 3
In service: 1954
EIA plant ID: 518

Where it is

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County: Larimer County, Colorado
Coordinates: 40.365, -105.236
Balancing authority: WACM
Sector: Electric Utility

Units, technology and status

Operator of record: U S Bureau of Reclamation
Primary energy source: Hydro
Technologies: Conventional Hydroelectric, Hydroelectric Pumped Storage
Status: Operating

This site runs on more than one energy source. EIA-860M capacity splits: Hydro 86 MW, Pumped storage 9 MW. It is filed here under Hydro, the source with the most capacity.

Every plant U S Bureau of Reclamation reports to EIA →

Flatiron: FAQ

Where is Flatiron?: In Larimer County, Colorado (CO). 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 Flatiron?: 95 MW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.
Who owns Flatiron?: EIA-860M names U S Bureau of Reclamation 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 Flatiron LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — U S Bureau of Reclamation 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 "Flatiron LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Flatiron still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.