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9.8 MW Natural Gas Internal Combustion Engine (4 MW) + Petroleum Liquids (6 MW) standby in Poweshiek, IA — Midcontinent Independent Transmission System Operator, Inc..
9.8 MW
Nameplate Capacity
8
Generators
units
Hybrid (2)
Technology
Natural Gas Internal Combustion Engine + Petroleum Liquids
1940
Operating Since
Coordinates
41.5861, -92.5228
County
Poweshiek, IA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City of Montezuma - (IA) | — | — |
| Owner(s) | City of Montezuma - (IA) | — | — |
| Status | Standby | — | — |
Located in Poweshiek County, Iowa, the Montezuma plant has a total capacity of 9.8 MW. The plant began operating in 1940 and is owned and operated by the City of Montezuma. It utilizes both natural gas internal combustion engines and petroleum liquids as fuel sources, classifying it as a hybrid plant. The plant consists of 8 generators.
The Montezuma plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the NERC MRO region. In terms of size, it is ranked 25th out of 90 power plants in Iowa and 347th out of 886 plants nationally. The plant's latest annual generation was 119 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
MRO — Midwest Reliability Organization
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
161.0 kV
Regulatory Status
RE — Regulated
Entity Type
Municipal
Sector
Electric Utility
9 MWh
Latest Month
119 MWh
Annual Generation
0.1%
Capacity Factor
CO₂ Intensity
1584 lb/MWh
Low-utilization plant — per-MWh rate is dominated by startup/standby emissions; not directly comparable to baseload averages.
NOx
34 lb/MWh
SO₂
2 lb/MWh
CH₄
0.056 lb/MWh
N₂O
0.010 lb/MWh
Capacity Factor
0.2%
Annual Net Gen
0 GWh
CO₂eq
1588 lb/MWh
Subregion
MRO West
2013
$765/kW
Est. Construction Cost
Total estimated cost: $7.5M
Market Position
ISO/RTO Market
MISO
LMP Node
MEC.CMMPA.MONT
Pricing Hub
MINN.HUB
Alt. Hub / Zone
ILLINOIS.HUB
Location Type
Load Zone
Node Source
Curated node match
Last updated 2026-03-26
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