Interstate
Natural gas power plant in Sangamon County, Illinois. 138.6 MW of nameplate capacity across 1 generator, operated by City of Springfield - (IL).
Also known as Interstate Gas Power Plant · EIA plant 7425
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 138.6 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- September 1997First generator online
- Operator
- City of Springfield - (IL)EIA operator ID 17828
- Grid
- MISOBalancing authority MISO
- Price nodes
- 1 MISO nodeResource nodes with prices
- Location
- Sangamon County, IL39.8233, −89.5891
- EIA plant ID
- 7425EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Interstate produces
Free · EIA-923Net generation, 2025
57.5 GWh
57,526 MWh, final
Capacity factor, 2025
4.7%
2024: 4.2%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
1.2–57.5
GWh a year. Low 2021, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 12,123 | Not reported | 12 of 12 |
| 2001 | 23,323 | Not reported | 12 of 12 |
| 2002 | 9,111 | Not reported | 12 of 12 |
| 2003 | 9,993 | Not reported | 12 of 12 |
| 2004 | 3,900 | Not reported | 12 of 12 |
| 2005 | 20,840 | Not reported | 12 of 12 |
| 2006 | 10,334 | Not reported | 12 of 12 |
| 2007 | 19,010 | Not reported | 12 of 12 |
| 2008 | 11,403 | Not reported | 12 of 12 |
| 2009 | 5,617 | Not reported | 12 of 12 |
| 2010 | 31,802 | 2.6% | 12 of 12 |
| 2011 | 15,714 | 1.3% | 12 of 12 |
| 2012 | 7,621 | 0.6% | 12 of 12 |
| 2013 | 7,355 | 0.6% | 12 of 12 |
| 2014 | 8,825 | 0.7% | 12 of 12 |
| 2015 | 21,373 | 1.8% | 12 of 12 |
| 2016 | 44,347 | 3.6% | 12 of 12 |
| 2017 | 18,446 | 1.5% | 12 of 12 |
| 2018 | 30,355 | 2.5% | 12 of 12 |
| 2019 | 10,946 | 0.9% | 12 of 12 |
| 2020 | 28,999 | 2.4% | 12 of 12 |
| 2021 | 1,152 | Not reported | 12 of 12 |
| 2022 | 1,365 | Not reported | 12 of 12 |
| 2023 | 39,520 | 3.3% | 12 of 12 |
| 2024 | 50,816 | 4.2% | 12 of 12 |
| 2025 | 57,526 | 4.7% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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 · MISOEmissions
Free · EPA CAMPDCO₂, 2025
38,804
US short tons. 2024: 45,334
SO₂, 2025
0
US short tons
NOx, 2025
65
US short tons
CO₂ per MWh, calculated
0.67 t
About 1,349 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (1), matched to EIA plant 7425 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, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbine | 138.6 | September 1997 |
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 City of Springfield - (IL) 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 Interstate
More plants operated by City of Springfield - (IL)
Questions about Interstate
How much power does Interstate produce?
Interstate reported 57,526 MWh (57.5 GWh) of net generation in 2025, a 4.7% capacity factor on 138.6 MW of nameplate capacity.
Where is Interstate?
Interstate is in Sangamon County, Illinois, at 39.8233, −89.5891. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Interstate?
EIA-860M for August 2026 lists City of Springfield - (IL) as the operator (EIA operator ID 17828). The operator is not always the owner.
When did Interstate start operating?
Its first generator began operating in September 1997, according to EIA-860M.
Does InfraMap have power prices for Interstate?
Yes. InfraMap has MISO day-ahead and real-time prices at 1 price node linked to Interstate, 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
- MISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page