LaSalle Generating Station — Plant Summary
- EIA Plant ID
- 6026
- Capacity
- 2340 MW
- Primary Fuel
- Nuclear
- Technology
- Nuclear
- Status
- Operating
- Location
- LaSalle, IL
- Operating Since
- 1984
- Generators
- 2
- Operator
- Constellation Nuclear
- Parent Company
- Exelon
- Annual Generation
- 18,873,952 MWh
- Capacity Factor
- 91.8%
- Balancing Authority
- PJM Interconnection, LLC
- ISO/RTO
- PJM
- NERC Region
- RFC
LaSalle Generating Station
OperatingNuclear
Ranked #3 of 6 Nuclear plants in IL#17 of 57 nationally
2340 MW Nuclear operating in LaSalle, IL — PJM Interconnection, LLC
EIAGEMWD
2,340 MW
Nameplate Capacity
2
Generators
units
Nuclear
Technology
1984
Operating Since
Location
Coordinates
41.2455, -88.6691
County
LaSalle, IL
Nearby Plants
- Grand Ridge Battery ProjectsBESS36 MW · 2.4 km
- Grand Ridge Wind Energy CenterWind210 MW · 5.1 km
- LaSalle Solar 1Solar2 MW · 9.3 km
Ownership & Operator
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 | Constellation Nuclear | Exelon Generation | Exelon |
| Owner(s) | Constellation Nuclear | Exelon | — |
| Status | Operating | operating | — |
Ownership Chain
About
LaSalle County Nuclear Generating Station, located in Brookfield Township, LaSalle County, Illinois, near Marseilles, 11 miles (18 km) southeast of Ottawa, serves Chicago and Northern Illinois with electricity. The plant is owned and operated by Constellation Energy following separation from Exelon Corporation in 2022. Its Units 1 and 2 began commercial operation in October 1982, and October 1984, respectively.
Read more on WikipediaLaSalle Generating Station is a 2,340 MW nuclear power plant located in LaSalle County, Illinois. The plant, which began operating in 1984, is owned by Exelon and operated by Constellation Nuclear. It consists of two nuclear reactors and is the third-largest power plant in Illinois and the 16th-largest nuclear plant in the United States, out of 55 total.
LaSalle Generating Station operates within the PJM Interconnection, LLC balancing authority and the ReliabilityFirst Corporation (RFC) NERC region. The plant's latest annual generation was 18,873,952 MWh, achieving a capacity factor of 91.8%.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
RFC
Balancing Authority
PJM Interconnection, LLC
Grid Voltage
345 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
1.6M MWh
Latest Month
18.9M MWh
Annual Generation
91.8%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
LaSalle Substation · 345 kV
Substation Distance
< 10 km
Operator
Commonwealth Edison
Coord Source
OSM spatial
Market Position
ISO/RTO Market
PJM
LMP Node
86191101
Pricing Hub
N ILLINOIS HUB
Node Source
EIA-860 direct report
News & Articles (6)Beta
Grid·outage
Planned outage begins for La Salle nuclear plant
Operators at Exelon Generation's La Salle Generating Station near Marseilles removed the Unit 1 generator from service Monday morning to...
Exelon Generation (operator)La Salle Generating Station (operator)
Shaw Local·6 years ago
Industry·corporate
Maintenance Diver Dies At Exelon Generating Station
The LaSalle County Coroner's Office has identified the deceased diver who was working at Exelon's LaSalle Generating Station near...
Exelon (operator)LaSalle Generating Station (operator)
wcsjnews.com·6 years ago
Industry·corporate
Maintenance Diver Who Died While Working At Exelon Generating Station in LaSalle Co. Identified
The LaSalle County Coroner's Office has identified the deceased diver who was working at Exelon's LaSalle Generating Station near Marseilles.
Exelon (operator)LaSalle Generating Station (operator)
WSPYnews.com·6 years ago
Industry·corporate
Maintenance Diver Dies At Exelon Generating Station in LaSalle Co.
A maintenance diver died during work at Exelon's LaSalle Generating Station on Tuesday, Nov. 12. According to the Nuclear Regulatory Commission, communication...
Exelon (operator)LaSalle Generating Station (operator)
WCSJ News·6 years ago
Last updated 2026-03-14
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