Coffeen Lake Dam

Montgomery County, Illinois (near GREENVILLE)

River/Stream: MC DAVID BRANCH, SHOAL CREEK

Significant Hazard

Failure could cause economic loss or disruption

Key Facts

Dam Type
Earth
Height
70 ft
Dam Length
1,300 ft
Reservoir Storage
35,800 acre-ft
Year Completed
1964
Primary Purpose
Other
Owner Type
Public Utility
Max Discharge
8,430 cfs

Condition Assessment

Not AvailableLast inspected: 2025-09-17

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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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.