118.7 MW Natural Gas Fired Combustion Turbine (62 MW) + Natural Gas Internal Combustion Engine (56 MW) operating in Union, IA — Midcontinent Independent Transmission System Operator, Inc..
118.7 MW
Nameplate Capacity
5
Generators
units
Hybrid (2)
Technology
Natural Gas Fired Combustion Turbine + Natural Gas Internal Combustion Engine
1973
Operating Since
Coordinates
41.1136, -94.3477
County
Union, IA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Central Iowa Power Cooperative | Central Iowa Power | — |
| Owner(s) | Central Iowa Power Cooperative | Central Iowa Power | — |
| Status | Operating | — | — |
Summit Lake is a 118.7 MW hybrid power plant located in Union County, Iowa. The plant, which began operating in 1973, is owned by Central Iowa Power and operated by Central Iowa Power Cooperative. It utilizes both natural gas-fired combustion turbine and natural gas internal combustion engine technologies across its five generators.
The plant's latest annual generation was 70,033 MWh, resulting in a capacity factor of 6.7%. Summit Lake operates within the Midcontinent Independent Transmission System Operator, Inc. (MISO) balancing authority and the MRO NERC region. It is ranked as the 12th largest power plant out of 13 in Iowa, and 891st out of 945 nationally.
Generated from EIA, GEM, and public data sources
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
69 kV
Regulatory Status
RE
Entity Type
Cooperative
Sector
Electric Utility
5.7K MWh
Latest Month
70.0K MWh
Annual Generation
6.7%
Capacity Factor
No financial data available for this plant.
Market Position
ISO/RTO Market
MISO
LMP Node
ALTW.SLAK_CT2
Pricing Hub
MINN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-03-26
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