Flatiron
Larimer County, Colorado · EIA plant ID 518 · Operator: U S Bureau of Reclamation
Nameplate95MWSummer 95 MW
Generators3in service
Net generation207GWh12 mo to Aug 2026
Capacity factor33%hydro units, summer MW
Heat rate—thermal plants only
First online1954
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 148.5 | 24.9% | — |
| 2002 | 160.5 | 22.2% | — |
| 2003 | 185.2 | 24.6% | — |
| 2004 | 169.1 | 22.4% | — |
| 2005 | 183.1 | 17.6% | — |
| 2006 | 238.3 | 31.6% | — |
| 2007 | 246.8 | 32.8% | — |
| 2008 | 170 | 22.5% | — |
| 2009 | 213 | 28.2% | — |
| 2010 | 170.7 | 22.6% | — |
| 2011 | 238.7 | 30.4% | — |
| 2012 | 221.5 | 27.8% | — |
| 2013 | 179.9 | 22.7% | — |
| 2014 | 222.6 | 31.3% | — |
| 2015 | 143.6 | 21.5% | — |
| 2016 | 208.1 | 32.1% | — |
| 2017 | 156.4 | 25.1% | — |
| 2018 | 200 | 31.8% | — |
| 2019 | 201.6 | 31.6% | — |
| 2020 | 126.8 | 22.3% | — |
| 2021 | 215.4 | 33.2% | — |
| 2022 | 150.1 | 24.4% | — |
| 2023 | 201.7 | 32.2% | — |
| 2024 | 169.4 | 26.7% | — |
| 2025 | 214.8 | 34.4% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 43 | 43 | Jan 1954 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 43 | 43 | Jan 1954 | Operating | — | coming soon |
| 3 | Hydroelectric Pumped Storage | PS | 8.5 | 8.5 | May 1954 | Operating | — | coming soon |
Owner / operator
Operator: U S Bureau of Reclamation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| U S Bureau of Reclamation | 100.0% | 95 MW |
Nearby plants
Within 80 km.
| Carter Hydro | 3 MW | 5.1 km |
| Big Thompson | 5 MW | 6.3 km |
| Pole Hill | 38 MW | 7.5 km |
| Coyote Ridge Community Solar | 2 MW | 17.5 km |
| SR Mavericks | 8 MW | 23 km |
| Estes | 45 MW | 23.2 km |