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2285.3 MW Nuclear operating in Berrien, MI
2,285.3 MW
Nameplate Capacity
2
Generators
units
Nuclear
Technology
1975
Operating Since
Coordinates
41.9756, -86.5652
County
Berrien, MI
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Indiana Michigan Power Co | American Electric Power Company | American Electric Power |
| Owner(s) | Indiana Michigan Power Co | Commercial Development Company | — |
| Status | Operating | operating | — |
Donald C. Cook Nuclear Plant is a nuclear power plant located just north of the city of Bridgman, Michigan which is part of Berrien County, on a 650-acre (260 ha) site 11 miles south of St. Joseph, Michigan, United States. The plant is owned by American Electric Power (AEP) and operated by Indiana Michigan Power, an AEP subsidiary. It has two nuclear reactors and is currently the company's only nuclear power plant.
Read more on WikipediaThe Donald C Cook Nuclear Plant is located in Berrien County, Michigan. It is owned by Commercial Development Company and operated by Indiana Michigan Power Co. The plant has a total capacity of 2285.3 MW across two nuclear generators. The plant began operating in 1975 and is the largest of two nuclear plants in the state. Nationally, it ranks as the 18th largest of 55 nuclear plants.
In the most recent year with available data, the plant generated 17,586,009 MWh, achieving a capacity factor of 87.7%. The plant operates within the PJM Interconnection, LLC balancing authority and the RFC NERC region. Financial data indicates an installed cost of $1242.36 per kW, according to FERC filings.
Generated from EIA, GEM, and public data sources
ISO/RTO
PJM
Market
ISO/RTO Member
NERC Region
RFC
Balancing Authority
PJM Interconnection, LLC (PJM)
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.
1.7M MWh
Latest Month
17.6M MWh
Annual Generation
87.7%
Capacity Factor
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Nuclear · Indiana Michigan Power Company · Data from 2015–2024
$1,775/kW
Installed Cost
$21/kW
Annual CapEx
$20.0/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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Point of Interconnection
Nearest Substation
Cook Substation · 765 kV
Substation Distance
< 10 km
Operator
Indiana Michigan Power
Coord Source
OSM spatial
Market Position
ISO/RTO Market
PJM
LMP Node
40243801
Pricing Hub
N ILLINOIS 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.
Last updated 2026-03-14
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NRC initiated a special inspection at Cook Nuclear Plant to investigate circumstances surrounding multiple diesel generator failures.
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