Williams Ignacio Natural Gas Plant
La Plata County, Colorado · EIA plant ID 50205 · Operator: Williams Field Services Co
Nameplate6MWSummer 6 MW
Generators1in service
Net generation47GWh12 mo to Aug 2026
Capacity factor89%other units, summer MW
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online1984
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), other 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2002 | 96.8 | — | 10,714 |
| 2004 | 32.5 | — | 4,768 |
| 2005 | 43.7 | — | 4,768 |
| 2006 | 46 | — | 4,768 |
| 2007 | 41.2 | — | — |
| 2008 | 32.8 | — | — |
| 2009 | 35.9 | 67.2% | — |
| 2010 | 47.4 | 88.8% | — |
| 2011 | 48.4 | 90.5% | — |
| 2012 | 44.7 | 83.4% | — |
| 2013 | 38.4 | 71.9% | — |
| 2014 | 42.4 | 79.3% | — |
| 2015 | 39.9 | 74.6% | — |
| 2016 | 42 | 78.3% | — |
| 2017 | 41.8 | 78.2% | — |
| 2018 | 41.6 | 77.9% | — |
| 2019 | 43.5 | 81.3% | — |
| 2020 | 46.2 | 86.3% | — |
| 2021 | 47.8 | 89.5% | — |
| 2022 | 46.5 | 87.1% | — |
| 2023 | 45 | 84.2% | — |
| 2024 | 48.1 | 89.8% | — |
| 2025 | 46.6 | 87.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 7101 | All Other | ST | 6.1 | 6.1 | Dec 1984 | Operating | — | coming soon |
| G710 | — | ST | 6.1 | 6.1 | Dec 1984 | not_current | — | coming soon |
Owner / operator
Operator: Williams Field Services Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Williams Field Services Co | 100.0% | 6 MW |
Nearby plants
Within 80 km.
| LPEA Sunnyside Solar 1 Facility | 2 MW | 7.1 km |
| Vallecito Hydroelectric | 6 MW | 31.6 km |
| Navajo Dam | 30 MW | 40.7 km |
| Tacoma | 5 MW | 42.1 km |
| Foxtail Flats Solar, LLC | — | 53.5 km |
| Four Mile Mesa Solar, LLC | — | 53.5 km |