Search
Search plants, projects, owners, and states
Search plants, projects, owners, and states
189 MW Natural Gas operating in Marshall, IA
189 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combustion Turbine
Technology
1978
Operating Since
Coordinates
42.0474, -92.8594
County
Marshall, IA
Nearby Plants
Forward-looking, asset-specific exposure analytics combining climate hazards, generation variability, and counterparty risk into a single decision-grade view. Powered by InfraRisk.
See the full risk decomposition + scenarios for this asset.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Interstate Power and Light Co | Interstate Power and Light | — |
| Owner(s) | Interstate Power and Light Co | Alliant Energy | — |
| Status | Operating | — | — |
The Marshalltown Generating Station is a 189 MW natural gas-fired power plant located in Marshall County, Iowa. The plant began operating in 1978 and consists of three natural gas-fired combustion turbine generators. It is owned by Alliant Energy and operated by Interstate Power and Light Co. The plant is connected to the Midcontinent Independent Transmission System Operator (MISO) balancing authority. Marshalltown ranks as the 6th largest power plant in Iowa out of 13, and 762nd nationally out of 945 plants.
In the most recent year of reported data, the plant generated 79,031 MWh of electricity, operating at a capacity factor of 4.7%. Financial data indicates an installed cost of $141.79 per kW, according to FERC filings. News coverage related to the plant includes 6 articles categorized as industry news, 3 as regulatory news, and 1 as grid-related news.
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
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
5.7K MWh
Latest Month
79.0K MWh
Annual Generation
4.7%
Capacity Factor
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this asset.
CO₂ Intensity
0 lb/MWh
NOx
3 lb/MWh
SO₂
0.008 lb/MWh
CH₄
0.034 lb/MWh
N₂O
0.003 lb/MWh
Capacity Factor
7.4%
Annual Net Gen
122 GWh
CO₂eq
2 lb/MWh
Subregion
MRO West
Gas turbine · Interstate Power and Light Company · Data from 2015–2024
$330/kW
Installed Cost
$20/kW
Annual CapEx
$38.7/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this asset.
Point of Interconnection
Nearest Substation
Marshalltown Substation · 161 kV
Substation Distance
< 10 km
Operator
ITC
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
ALTW.MTOWNCT1
Pricing Hub
MINN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
View all articlesNo Ask reports yet for this entity.
Ask about MarshalltownForward forecasts, scenario decomposition, and risk-decision tooling for this asset.