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199.8 MW Wind operating in Winnebago, IA
199.8 MW
Nameplate Capacity
1
Generators
unit
Onshore Wind Turbine
Technology
2020
Operating Since
Coordinates
43.4141, -93.9830
County
Winnebago, IA
Nearby Plants
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Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Interstate Power and Light Co | Alliant Energy | — |
| Owner(s) | Interstate Power and Light Co | Alliant Energy | — |
| Status | Operating | operating | — |
Located in Winnebago County, Iowa, the Golden Plains wind farm has a total capacity of 199.8 MW. The facility, which began operating in 2020, is owned by Alliant Energy and operated by Interstate Power and Light Co. It consists of a single generator utilizing onshore wind turbine technology. The plant uses GE2.5-127 wind turbines manufactured by GE Wind, with a rotor diameter of 127 meters and a hub height of 89 meters. Golden Plains operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the MRO NERC region.
In its most recent year of operation, Golden Plains generated 736,798 MWh of electricity, achieving a capacity factor of 42.2%. The plant's installed cost was $1690.62 per kW, according to FERC data. Golden Plains is ranked as the 28th largest wind farm in Iowa out of 54, and 352nd nationally out of 734.
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.
82.8K MWh
Latest Month
736.8K MWh
Annual Generation
42.2%
Capacity Factor
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Wind · Interstate Power and Light Company · Data from 2020–2024
$1,781/kW
Installed Cost
$29/kW
Annual CapEx
$4.9/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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Point of Interconnection
Nearest Substation
Bison Substation · 345 kV
Substation Distance
< 10 km
Operator
ITC
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
ALTW.GOLDENPLN
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
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