Frosty Acres Lake Dam Reservoir Report
Last Updated: December 5, 2025
Frosty Acres Lake Dam, located in Marion, Illinois, is a captivating example of a privately owned Earth dam designed by the USDA NRCS in 1964 for recreational purposes.
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Summary
Standing at a height of 20 feet with a length of 537 feet, this dam creates a reservoir with a maximum storage capacity of 91 acre-feet. The dam, situated on Crooked Creek offstream, is regulated by the Illinois Department of Natural Resources and undergoes regular inspections to ensure its safety and compliance with state regulations.
Despite its low hazard potential, Frosty Acres Lake Dam is considered to have a moderate risk level, with a hazard rating of 3. The dam's condition assessment is currently listed as not available, highlighting the need for ongoing monitoring and maintenance to mitigate any potential risks. While its spillway is uncontrolled, the dam's associated structures are limited, and it lacks detailed information on surface area and drainage area. With its picturesque location and recreational purpose, Frosty Acres Lake Dam serves as a reminder of the delicate balance between water resource management and climate resilience in Illinois.
Year Completed |
1964 |
Dam Length |
537 |
Dam Height |
20 |
River Or Stream |
CROOKED CREEK-OFFSTREAM |
Primary Dam Type |
Earth |
Nid Storage |
91 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
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.
Frosty Acres Lake Dam