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576.3 MW Natural Gas operating in Polk, IA
576.3 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
2003
Operating Since
Coordinates
41.5563, -93.5283
County
Polk, IA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | MidAmerican Energy Co | MidAmerican Energy | — |
| Owner(s) | MidAmerican Energy Co | Berkshire Hathaway | — |
| Status | Operating | — | — |
The Greater Des Moines Energy Center is a 576.3 MW natural gas-fired combined cycle power plant located in Polk County, Iowa. The plant, which began operating in 2003, is owned by Berkshire Hathaway and operated by MidAmerican Energy Company. It consists of three generators utilizing natural gas as its primary fuel source. The plant is the third-largest of 13 power plants in Iowa, and ranks 425th out of 945 plants nationally.
In the most recent year of data, the Greater Des Moines Energy Center generated 2,178,470 MWh of electricity, achieving a capacity factor of 42.9%. The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority. Financial data indicates an installed cost of $572.64 per kW, according to FERC filings.
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
345.0 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.
184.0K MWh
Latest Month
2.2M MWh
Annual Generation
42.9%
Capacity Factor
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
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CO₂ Intensity
862 lb/MWh
NOx
0.066 lb/MWh
SO₂
0.004 lb/MWh
CH₄
0.015 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
42.4%
Annual Net Gen
2141 GWh
CO₂eq
863 lb/MWh
Subregion
MRO West
Gas turbine · MidAmerican Energy Company · Data from 2015–2024
$530/kW
Installed Cost
$1/kW
Annual CapEx
$25.8/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.
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Point of Interconnection
Nearest Substation
Greater Des Moines Energy Center Substation · 345 kV
Substation Distance
< 10 km
Operator
MidAmerican Energy
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
MEC.CC.GDM1&2
Pricing Hub
MINN.HUB
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.
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