Jerry F. Costello Lock and Dam

Randolph County, Illinois (near Modoc)

River/Stream: KASKASKIA RIVER

Significant Hazard

Failure could cause economic loss or disruption

Key Facts

Dam Type
Concrete
Height
81 ft
Dam Length
603 ft
Reservoir Storage
25,246 acre-ft
Year Completed
1974
Primary Purpose
Navigation
Owner Type
Federal
Max Discharge
62,000 cfs

Condition Assessment

Not AvailableLast inspected: 2023-03-29

Hazard Classification: Significant — 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
IL00115
State
Illinois (IL)
Coordinates
37.98419, -89.94597
Age
52 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.