Pana Lake Dam Reservoir Report
Last Updated: December 5, 2025
Located in Vandalia, Illinois, the Pana Lake Dam is a vital water resource structure designed by the Engineering Service Corp.
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Summary
The dam, completed in 1920, serves multiple purposes including recreation and water supply, making it a crucial asset for the local community. With a height of 53 feet and a length of 800 feet, the dam boasts a storage capacity of 6004 acre-feet and a surface area of 241 acres.
Managed by the Illinois Department of Natural Resources (IDNR), the Pana Lake Dam is regulated, inspected, and enforced by the state to ensure its safety and functionality. The dam's spillway, with a width of 155 feet, is uncontrolled, while the hazard potential is deemed significant. The risk assessment for the dam is moderate, highlighting the importance of ongoing monitoring and management to mitigate any potential risks to the surrounding area.
For water resource and climate enthusiasts, the Pana Lake Dam presents an intriguing case study in dam infrastructure management. Its historical significance, combined with its multiple uses and the intricate regulatory framework governing its operation, make it a fascinating subject for further exploration. As a key player in water supply and recreation in Shelby County, Illinois, the Pana Lake Dam stands as a testament to the importance of sustainable water resource management in the face of changing climate patterns.
Year Completed |
1920 |
Dam Length |
800 |
Dam Height |
53 |
River Or Stream |
BECKS CREEK |
Primary Dam Type |
Earth |
Surface Area |
241 |
Drainage Area |
8.5 |
Nid Storage |
6004 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
53 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Pana Lake Dam