Lasalle Co. Nuclear Station Cooling Lake Dam

LaSalle County, Illinois (near MARSEILLES)

River/Stream: TRIB ILLINOIS RIVER

High Hazard

Failure would likely cause loss of life

Key Facts

Dam Type
Earth
Height
43 ft
Dam Length
37,942 ft
Reservoir Storage
44,167 acre-ft
Year Completed
1977
Primary Purpose
Other
Owner Type
Private
Max Discharge
5,884 cfs

Condition Assessment

Not AvailableLast inspected: 2025-08-27

Hazard Classification: High — This describes the potential consequences of dam failure, not the likelihood of failure.

Condition Assessment: Not Available — This describes the current physical condition of the dam based on the most recent inspection.

Location

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Quick Stats

NID ID
IL01102
State
Illinois (IL)
Coordinates
41.26717, -88.64284
Age
49 years

Nearby Dams

External Resources

Data sourced from the National Inventory of Dams (NID). Information may not reflect the most current status of this dam. Hazard classification reflects potential consequences of failure, not the likelihood of failure or the current condition.