Ironwood LLC

Gas power plant in Pennsylvania, United States of America. Approximate location 40.3509, -76.3658.

GasPennsylvaniaUnited States of AmericaCO₂ reported

Ironwood LLC is a 778 MW gas power station in Pennsylvania, United States of America. It is operated by Helix Ironwood LLC. Based on reported annual generation of 4,844 GWh, it can supply roughly 1,383,857 homes. It ranks #446 of 9,833 United States of America power plants by installed capacity. Commissioned in 2002, it is around 24 years old — relatively modern. Its measured emissions of 1,677,037 t CO₂/yr (US EPA GHGRP) are equivalent to about 390,918 cars driven for a year. In context, gas supplies about 40.0% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

778MW installed capacity
4,844GWh reported / yr
1,383,857homes powered
1,677,037t CO₂ / yr (US EPA GHGRP)
2002commissioned (~24 yrs)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0055337.

1,677,037 t CO₂/yr — in everyday terms

This facility's annual emissions are roughly equivalent to:

390,918passenger cars driven for a year
218,706homes' yearly energy use
27,950,617tree seedlings grown 10 years to absorb it

Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions reported to US EPA GHGRP.

Reported generation trend

2013: 4,319 GWh20132014: 5,208 GWh20142015: 4,868 GWh20152016: 5,398 GWh20162017: 4,849 GWh20172018: 5,210 GWh20182019: 4,844 GWh20195k GWh

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

Owner

Operated by Helix Ironwood LLC.

Local climate & thermal context

This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 40.4°N — which shapes how much energy it can produce and how its output varies through the year.

10.8°Cannual mean temp
2,963heating degree-days (base 18°C)
371cooling degree-days (base 18°C)
172 melevation

Monthly mean temperature

J: -2 °CJF: -1 °CFM: 4 °CMA: 10 °CAM: 16 °CMJ: 20 °CJJ: 23 °CJA: 22 °CAS: 18 °CSO: 12 °CON: 6 °CND: 1 °CD23 °C

Heating degree-days here run 21% 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: 62/100 — this site sits in the mid third of the power plants we cover by heating degree-days.

In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.

A gas turbine here also runs ~0% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).

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.

How it compares & nearby plants

The #227 largest gas power plant of 1818 in United States of America by capacity.

United States of America has 1818 gas power plants in this dataset, together about 546,436 MW of capacity.

Nearby power plants

Location

Coordinates 40.3509, -76.3658 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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