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138.6 MW Natural Gas operating in Sangamon, IL — Midcontinent Independent Transmission System Operator, Inc..
138.6 MW
Nameplate Capacity
1
Generators
unit
Natural Gas Fired Combustion Turbine
Technology
1997
Operating Since
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City of Springfield - (IL) | City of Springfield - (IL) | — |
| Owner(s) | City of Springfield - (IL) | City of Springfield - (IL) | — |
| Status | Operating | — | — |
The Interstate power plant, located in Sangamon County, Illinois, is a 138.6 MW natural gas-fired combustion turbine facility. It began operating in 1997 and is owned and operated by the City of Springfield, Illinois. The plant has one generator.
Interstate operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC NERC region. In the most recent year with available data, the plant generated 50,816 MWh, achieving a capacity factor of 4.2%. Interstate is ranked as the 32nd largest power plant in Illinois out of 32 plants, and 846th nationally out of 945 plants.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
138.0 kV
Regulatory Status
RE — Regulated
Entity Type
Municipal
Sector
Electric Utility
512 MWh
Latest Month
50.8K MWh
Annual Generation
4.2%
Capacity Factor
CO₂ Intensity
1550 lb/MWh
NOx
2 lb/MWh
SO₂
0.008 lb/MWh
CH₄
0.031 lb/MWh
N₂O
0.003 lb/MWh
Capacity Factor
3.3%
Annual Net Gen
40 GWh
CO₂eq
1552 lb/MWh
Subregion
SERC Midwest
2013
$965/kW
Est. Construction Cost
Total estimated cost: $133.8M
Point of Interconnection
Nearest Substation
Interstate · 138 kV
Substation Distance
< 10 km
Operator
City Water, Light & Power
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
CWLP.INTERSA81
Pricing Hub
ILLINOIS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-03-25
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