Rose Lake Dam Reservoir Report

Last Updated: December 5, 2025

Rose Lake Dam, located in Marion, Illinois, along Jamison Creek, is a privately owned earth dam that was completed in 1954 for recreational purposes.


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Summary

With a height of 23 feet and a length of 275 feet, the dam has a storage capacity of 173 acre-feet and a normal storage level of 107 acre-feet. Despite being classified as having a low hazard potential, a moderate risk assessment rating of 3 indicates a need for risk management measures to ensure the safety and integrity of the structure.

Managed by the Illinois Department of Natural Resources (IDNR), Rose Lake Dam is subject to state regulation, permitting, inspection, and enforcement to ensure compliance with safety standards. The dam features an uncontrolled spillway and outlet gates, with an inspection frequency of every 5 years. While the condition assessment is currently unavailable, the dam is monitored for any potential risks and emergency preparedness, although specific details regarding emergency action plans and inundation maps are not provided.

Although Rose Lake Dam primarily serves recreational purposes, its location and design warrant ongoing attention to mitigate any potential risks associated with its operation. With its historical significance and importance for the local community, the dam's continued maintenance and adherence to safety regulations are crucial in safeguarding the surrounding environment and water resources for future generations of climate and water resource enthusiasts to enjoy.

Year Completed

1954

Dam Length

275

Dam Height

23

River Or Stream

JAMISON CREEK

Primary Dam Type

Earth

Nid Storage

173

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

23
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.