Ironwood LLC
Natural gas power plant in Lebanon County, Pennsylvania. 777.6 MW of nameplate capacity across 3 generators, operated by Helix Ironwood LLC.
Also known as EIA plant 55337
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Key facts
- Capacity
- 777.6 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- December 2001First generator online
- Operator
- Helix Ironwood LLCEIA operator ID 61121
- Grid
- PJMBalancing authority PJM
- Price nodes
- 3 PJM nodesResource nodes with prices
- Location
- Lebanon County, PA40.3509, −76.3658
- EIA plant ID
- 55337EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Ironwood produces
Free · EIA-923Net generation, 2025
4.90 TWh
4,899,051 MWh, final
Capacity factor, 2025
71.9%
2024: 64.5%
January to July 2026
1.96 TWh
Provisional
Range, 2016 to 2025
4.2–5.4
TWh a year. Low 2023, high 2016
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 460,740 | Not reported | 6 of 12 |
| 2002 | 1,594,823 | Not reported | 12 of 12 |
| 2003 | 611,862 | Not reported | 12 of 12 |
| 2004 | 1,021,999 | Not reported | 12 of 12 |
| 2005 | 727,494 | Not reported | 12 of 12 |
| 2006 | 1,310,278 | Not reported | 12 of 12 |
| 2007 | 2,248,963 | Not reported | 12 of 12 |
| 2008 | 1,606,920 | Not reported | 12 of 12 |
| 2009 | 3,070,943 | Not reported | 12 of 12 |
| 2010 | 3,646,441 | 53.5% | 12 of 12 |
| 2011 | 4,741,290 | 69.6% | 12 of 12 |
| 2012 | 4,398,665 | 64.4% | 12 of 12 |
| 2013 | 4,319,195 | Not reported | 12 of 12 |
| 2014 | 5,208,269 | 76.5% | 12 of 12 |
| 2015 | 4,531,699 | 72.7% | 11 of 12 |
| 2016 | 5,397,630 | 79.0% | 12 of 12 |
| 2017 | 4,849,422 | Not reported | 12 of 12 |
| 2018 | 5,209,815 | 76.5% | 12 of 12 |
| 2019 | 4,843,502 | 71.1% | 12 of 12 |
| 2020 | 4,869,588 | 71.3% | 12 of 12 |
| 2021 | 4,394,625 | 64.5% | 12 of 12 |
| 2022 | 5,136,582 | 75.4% | 12 of 12 |
| 2023 | 4,241,847 | Not reported | 12 of 12 |
| 2024 | 4,407,279 | 64.5% | 12 of 12 |
| 2025 | 4,899,051 | 71.9% | 12 of 12 |
| 2026 (provisional, partial year) | 1,956,019 | 49.4% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · PJMEmissions
Free · EPA CAMPDCO₂, 2025
2.18M
US short tons. 2024: 1.93M
SO₂, 2025
11
US short tons
NOx, 2025
237
US short tons
CO₂ per MWh, calculated
0.44 t
About 888 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (1, 2), matched to EIA plant 55337 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
871
million gallons
Consumption, 2024
871
million gallons
Source
POTW and Pennsy Quarry
Ground, Fresh. Induced-draft tower
Watershed stress
Very low/none · 0.199
USGS SUI, HUC12 Headwaters Tulpehocken Creek
12 of 12 cooling months report withdrawal. Groundwater user; SUI describes surface water and is context only. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| CT1 | Natural Gas Fired Combined Cycle | 259.2 | December 2001 |
| CT2 | Natural Gas Fired Combined Cycle | 259.2 | December 2001 |
| ST4 | Natural Gas Fired Combined Cycle | 259.2 | December 2001 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Helix Ironwood LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Ironwood
Questions about Ironwood
How much power does Ironwood LLC produce?
Ironwood LLC reported 4,899,051 MWh (4.90 TWh) of net generation in 2025, a 71.9% capacity factor on 777.6 MW of nameplate capacity. From January to July 2026 it reported 1.96 TWh, which is provisional.
Where is Ironwood LLC?
Ironwood LLC is in Lebanon County, Pennsylvania, at 40.3509, −76.3658. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Ironwood LLC?
EIA-860M for August 2026 lists Helix Ironwood LLC as the operator (EIA operator ID 61121). The operator is not always the owner.
When did Ironwood LLC start operating?
Its first generator began operating in December 2001, according to EIA-860M.
Does InfraMap have power prices for Ironwood LLC?
Yes. InfraMap has PJM day-ahead and real-time prices at 3 price nodes linked to Ironwood LLC, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page