Prairie State Energy Raw Water Dam

Washington County, Illinois (near MARISSA)

River/Stream: PERCHED

High Hazard

Failure would likely cause loss of life

Key Facts

Dam Type
Earth
Height
40 ft
Dam Length
6,900 ft
Reservoir Storage
2,422 acre-ft
Year Completed
2010
Primary Purpose
Water Supply
Owner Type
Public Utility
Max Discharge

Condition Assessment

Not AvailableLast inspected: 2025-07-21

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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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.