Fisher Lake Dam Reservoir Report
Last Updated: December 23, 2025
Fisher Lake Dam, located in Monroe County, Illinois, was completed in 1952 for the primary purpose of recreation.
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Summary
This private dam on Bradley Branch is 28 feet high and 590 feet long, with a storage capacity of 186 acre-feet. The dam is state-regulated by the Illinois Department of Natural Resources (IDNR) and has a low hazard potential, making it a relatively safe structure.
Despite its age, Fisher Lake Dam has a moderate risk assessment rating of 3, indicating potential issues that need to be addressed. The dam features an uncontrolled spillway and outlet gates, with a spillway width of 73 feet. The last inspection in 2015 showed that the condition assessment was not available, highlighting the need for regular monitoring and maintenance to ensure the safety of the surrounding community and environment. As a popular recreation spot, Fisher Lake Dam plays a crucial role in providing water resources for the area while also posing some risks that need to be managed effectively.
Year Completed |
1952 |
Dam Length |
590 |
Dam Height |
28 |
River Or Stream |
BRADLEY BRANCH |
Primary Dam Type |
Earth |
Nid Storage |
186 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
Seasonal Comparison
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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.
Fisher Lake Dam