Flatiron

OperatingHydroHybrid

Ranked #4 of 49 Hydro plants in CO#200 of 1454 nationally

94.5 MW Conventional Hydroelectric (86 MW) + Hydroelectric Pumped Storage (9 MW) operating in Larimer, CO — Western Area Power Administration - Rocky Mountain Region

EIAGEMWD

94.5 MW

Nameplate Capacity

Generators

units

Hybrid (2)

Technology

Conventional Hydroelectric + Hydroelectric Pumped Storage

1954

Operating Since

Location

Coordinates

40.3650, -105.2360

County

Larimer, CO

Nearby Plants

Carter Hydro
Hydro2.6 MW · 5.1 km
Big Thompson
Hydro4.5 MW · 6.3 km
Pole Hill
Hydro38.2 MW · 7.6 km

Ownership & Operator

Owner data does not fully agree across sources.

EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.

Field	EIA	GEM	Wikidata
Operator	U S Bureau of Reclamation	US Bureau of Reclamation	—
Owner(s)	U S Bureau of Reclamation	US Bureau of Reclamation [100%]	—
Status	Operating	operating	—

Ownership Chain

GEM identifies the owner as US Bureau of Reclamation [100%]

This entity is not yet in the GEM ownership database — chain unavailable.

About

The Flatiron plant, located in Larimer County, Colorado, is a 94.5 MW hybrid hydroelectric facility utilizing both conventional and pumped storage technologies. It began operating in 1954 and is operated by the U.S. Bureau of Reclamation. The plant uses water (WAT) as its primary fuel source and consists of three generators. Flatiron ranks as the fourth-largest hydroelectric plant in Colorado (out of 49) and 201st nationally (out of 1464).

In the most recent year with available data, Flatiron generated 214,845 MWh of electricity, achieving a capacity factor of 26.0%. The plant operates within the Western Area Power Administration - Rocky Mountain Region balancing authority and is part of the Western Electricity Coordinating Council (WECC) NERC region.

Generated from EIA, GEM, and public data sources

EIA Plant Profile Wikidata Global Energy Monitor

Engineering & Generators

Grid Context

NERC Region

WECC

Balancing Authority

Western Area Power Administration - Rocky Mountain Region

Grid Voltage

115 kV

Regulatory Status

Entity Type

Federal

Sector

Electric Utility

Generation

23.1K MWh

Net Discharge

214.8K MWh

Annual Net Energy

26.0%

Capacity Factor

Jan 2023 – Dec 2025

Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.

Financial Data

No financial data available for this plant.

Pricing & Market Data

This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.

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