Bass Lake Dam Reservoir Report
Last Updated: December 19, 2025
Bass Lake Dam, located in Clark, Illinois, is a private dam primarily used for recreation purposes.
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Summary
Completed in 1952, this earth dam stands at a height of 33 feet with a length of 170 feet, providing a storage capacity of 50 acre-feet. The dam is regulated by the Illinois Department of Natural Resources (IDNR) and undergoes regular inspections to ensure its safety and compliance with state regulations.
Despite being classified as having a low hazard potential, Bass Lake Dam presents a moderate risk level due to its age and condition assessment being unavailable. The dam features an uncontrolled spillway with a width of 23 feet and outlet gates that are also uncontrolled. While the dam has not been modified in recent years, it is subject to a five-year inspection frequency to monitor any potential risks and ensure its continued safe operation.
With its picturesque location along the TRIB EAST FORK MILL CREEK, Bass Lake Dam serves as a popular recreational spot for water resource and climate enthusiasts. As a vital part of the local ecosystem, it is essential for the dam to be well-maintained and regularly inspected to prevent any potential hazards and ensure the safety of both the environment and the surrounding community.
Year Completed |
1952 |
Dam Length |
170 |
Dam Height |
33 |
River Or Stream |
TRIB EAST FORK MILL CREEK |
Primary Dam Type |
Earth |
Nid Storage |
50 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wabash River At Terre Haute
|
1770cfs |
Wabash River At Riverton Ind
|
1870cfs |
North Fork Embarras River Near Oblong
|
5cfs |
Big Raccoon Creek At Coxville
|
138cfs |
Busseron Creek Near Carlisle
|
452cfs |
Embarras River At Ste. Marie
|
34cfs |
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.
Bass Lake Dam