Lake Hillsboro Dam

Montgomery County, Illinois (near HILLSBORO)

River/Stream: TRIB MIDDLE FORK SHOAL CREEK

Significant Hazard

Failure could cause economic loss or disruption

Key Facts

Dam Type
Earth
Height
34 ft
Dam Length
693 ft
Reservoir Storage
1,747 acre-ft
Year Completed
1917
Primary Purpose
Recreation
Owner Type
Local Government
Max Discharge
3,276 cfs

Condition Assessment

Not AvailableLast inspected: 2025-09-18

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
IL00699
State
Illinois (IL)
Coordinates
39.18006, -89.47873
Age
109 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.