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38.2 MW Natural Gas Fired Combustion Turbine (22 MW) + Petroleum Liquids (17 MW) operating in Monroe, IL — Midcontinent Independent Transmission System Operator, Inc..
38.2 MW
Nameplate Capacity
14
Generators
units
Hybrid (2)
Technology
Natural Gas Fired Combustion Turbine + Petroleum Liquids
1946
Operating Since
Coordinates
38.3348, -90.1589
County
Monroe, IL
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City of Waterloo - (IL) | — | — |
| Owner(s) | City of Waterloo - (IL) | — | — |
| Status | Operating | — | — |
The Waterloo power plant, located in Monroe County, Illinois, has a total capacity of 38.2 MW across 14 generators. The plant's primary fuel is distillate fuel oil (DFO), but it also utilizes natural gas fired combustion turbine technology and petroleum liquids. It began operating in 1946 and is currently owned and operated by the City of Waterloo (IL). Waterloo is considered a hybrid plant due to its multiple fuel and technology types.
The plant operates within the Midcontinent Independent Transmission System Operator, Inc. (MISO) balancing authority and the SERC NERC region. In terms of size, Waterloo ranks 3rd out of 35 power plants in Illinois and 126th out of 886 plants nationally. The latest annual generation data indicates an output of 491 MWh, resulting in a capacity factor of 0.1%.
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
34.5 kV
Regulatory Status
RE — Regulated
Entity Type
Municipal
Sector
Electric Utility
48 MWh
Latest Month
491 MWh
Annual Generation
0.1%
Capacity Factor
CO₂ Intensity
1474 lb/MWh
Low-utilization plant — per-MWh rate is dominated by startup/standby emissions; not directly comparable to baseload averages.
NOx
10 lb/MWh
SO₂
0.609 lb/MWh
CH₄
0.038 lb/MWh
N₂O
0.006 lb/MWh
Capacity Factor
0.2%
Annual Net Gen
0 GWh
CO₂eq
1476 lb/MWh
Subregion
SERC Midwest
2013
$765/kW
Est. Construction Cost
Total estimated cost: $29.2M
Point of Interconnection
Nearest Substation
Waterloo
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
AMIL.IMEA1
Pricing Hub
ILLINOIS.HUB
Node Source
EIA-860 direct report
Last updated 2026-03-14
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