Williams Ignacio Natural Gas Plant — United States of America

Williams Ignacio Natural Gas Plant is a 6.1 MW cogeneration power plant in Colorado, United States of America. It is operated by Harvest Midstream Co. Based on reported annual generation of 44 GWh, it can supply roughly 12k homes. It ranks #6364 of 10,884 United States of America power plants by installed capacity. Commissioned in 1985, it is around 41 years old — long-established. In context, the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0050205.

Data provenance

Source of the capacity and fuel values:

capacity: Wikidata P2109; fuel: WRI GPPD

In context: how this plant compares

At 6.1 MW, Williams Ignacio Natural Gas Plant is below the median cogeneration plant in United States of America (26 MW). This facility converts its energy source into electricity for the grid; its capacity, fuel type and location determine its role in the national power mix.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

Key facts

Load factor

81%, from 44 GWh of reported generation; the median for 31 cogeneration plants in United States of America that report generation is 47%

Generation trend

40 GWh in 2015 and 44 GWh in 2019 (+9%)

Highest and lowest year

2019: 44 GWh; 2015: 40 GWh

Share of United States of America cogeneration capacity

0.6% of 1,037 MW across 34 plants in this dataset

Age among peers

7 of 34 dated cogeneration plants in United States of America are older

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Reported generation trend

Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Harvest Midstream Co.

Local climate & thermal context

This cogeneration plant produces electricity and useful heat together for higher fuel efficiency. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 37.1°N — which shapes how much energy it can produce and how its output varies through the year.

Monthly mean temperature

Heating degree-days here run 49% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.

Climate heat-demand index: 79/100 — this site sits in the top third of the power plants we cover by heating degree-days.

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

Site climate & environmental severity

This site sits in a mild atmospheric environment (estimated ISO 9223 class C2 — Low), with thermal cycling the leading environmental stress.

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby plants

The #26 largest cogeneration power plant of 34 in United States of America by capacity.

United States of America has 34 cogeneration power plants in this dataset, together about 1,037 MW of capacity.

Nearby power plants

• Coyote Clean power project · Gas · 280 MW · Colorado
• Vallecito Hydroelectric · Hydro · 5.8 MW · Colorado
• Navajo Dam · Hydro · 30 MW · New Mexico
• Tacoma · Hydro · 4.6 MW · Colorado
• Milagro Cogeneration Plant · Gas · 121.6 MW · New Mexico
• Desert Rock · Coal · 1,500 MW · New Mexico

Location

Coordinates 37.1456, -107.7847 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions