King Mountain Wind Ranch 1
Upton County, Texas · EIA plant ID 55581 · Operator: FPL Energy Upton Wind LP
Nameplate278MWSummer 278 MW
Generators1in service
Net generation638GWh12 mo to Aug 2026
Capacity factor26%wind units, summer MW
Heat rate—thermal plants only
First online2001
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), wind 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 | 135.2 | 9.5% | — |
| 2002 | 554.6 | 22.8% | — |
| 2003 | 550 | 22.6% | — |
| 2004 | 581 | 23.8% | — |
| 2005 | 648.5 | 26.6% | — |
| 2006 | 690.6 | 28.4% | — |
| 2007 | 646.4 | 26.5% | — |
| 2008 | 647.4 | 26.5% | — |
| 2009 | 580.6 | 23.8% | — |
| 2010 | 710.8 | 29.2% | — |
| 2011 | 685.3 | 28.1% | — |
| 2012 | 616.9 | 25.3% | — |
| 2013 | 616.9 | 25.3% | — |
| 2014 | 662.7 | 27.2% | — |
| 2015 | 512.5 | 21.0% | — |
| 2016 | 468.9 | 19.2% | — |
| 2017 | 462.1 | 19.0% | — |
| 2018 | 312.8 | 12.8% | — |
| 2019 | 504.3 | 20.7% | — |
| 2020 | 600.9 | 24.6% | — |
| 2021 | 504.3 | 20.7% | — |
| 2022 | 616.4 | 25.3% | — |
| 2023 | 566.8 | 23.3% | — |
| 2024 | 547.7 | 22.4% | — |
| 2025 | 573.5 | 23.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| EXIS | Onshore Wind Turbine | WT | 278 | 278 | Jun 2001 | Operating | — | siemens SWT-1.3-62 |
Owner / operator
Operator: FPL Energy Upton Wind LP. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| FPL Energy Upton Wind LP | 100.0% | 278 MW |
Nearby plants
Within 80 km.
| Roadrunner, LLC Hybrid | 463 MW | 4.8 km |
| Castle Gap Solar Hybrid | 190 MW | 5.9 km |
| Upton County Solar | 150 MW | 5.9 km |
| Revolution | 150 MW | 6.9 km |
| Mendoza Trail BESS | 200 MW | 7.3 km |
| Crossett Power Management LLC | 203 MW | 7.4 km |