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40.5 MW Natural Gas Internal Combustion Engine (8 MW) + Natural Gas Steam Turbine (31 MW) + Petroleum Liquids (2 MW) operating in Johnson, IA — Midcontinent Independent Transmission System Operator, Inc..
40.5 MW
Nameplate Capacity
8
Generators
units
Hybrid (3)
Technology
Natural Gas Internal Combustion Engine + Natural Gas Steam Turbine + Petroleum Liquids
1974
Operating Since
Coordinates
30.5557, -98.2573
County
Johnson, IA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | University of Iowa | — | — |
| Owner(s) | University of Iowa | — | — |
| Status | Operating | — | — |
The University of Iowa Main Power Plant, located in Johnson County, Iowa, has a total capacity of 40.5 MW. The plant began operating in 1974 and is owned and operated by the University of Iowa. It utilizes a mix of technologies, including natural gas internal combustion engines and natural gas steam turbines, and can also use petroleum liquids. The plant consists of 8 generators and is considered a hybrid facility due to its multiple fuel and technology types.
The facility operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the MRO NERC region. According to state rankings, the University of Iowa Main Power Plant is the 18th largest out of 37 power plants in Iowa. Nationally, it ranks as the 1180th largest out of 1963 plants. The plant's primary fuel source is natural gas.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
69.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
State
Sector
Commercial CHP
0 MWh
Latest Month
0 MWh
Annual Generation
0.0%
Capacity Factor
CO₂ Intensity
588 lb/MWh
NOx
0.641 lb/MWh
SO₂
0.039 lb/MWh
CH₄
0.114 lb/MWh
N₂O
0.015 lb/MWh
Capacity Factor
1.7%
Annual Net Gen
6 GWh
CO₂eq
595 lb/MWh
Subregion
MRO West
2013
$765/kW
Est. Construction Cost
Total estimated cost: $31.0M
Point of Interconnection
Nearest Substation
Substation L
Substation Distance
2.556 km
Operator
University of Iowa
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
MEC.CORALV1
Pricing Hub
MINN.HUB
Alt. Hub / Zone
ILLINOIS.HUB
Location Type
Generation Node
Node Source
Curated node match
Last updated 2026-03-26
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