Spring Lake Road Dam Reservoir Report
Last Updated: December 25, 2025
Spring Lake Road Dam, also known as Iloname 362, is a private-owned structure located in St.
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Summary
Clair County, Illinois. Completed in 1968, this Earth dam stands at a height of 21 feet and spans 210 feet in length. Its primary purpose is for recreation, with a storage capacity of 165 acre-feet and a normal storage level of 102 acre-feet.
Managed by the Illinois Department of Natural Resources, Spring Lake Road Dam poses a significant hazard potential due to its uncontrolled spillway and outlet gates. Despite being classified as having a moderate risk level, the dam has not undergone a recent condition assessment, making its current state unknown. With a biennial inspection frequency, the dam's emergency action plan and risk management measures are also not readily available.
Located along the Tributary of Douglas Creek, this dam serves as a vital component for recreational activities in the area. Its presence highlights the importance of proper maintenance and monitoring to ensure the safety and resilience of water resources in the face of changing climate conditions.
Year Completed |
1968 |
Dam Length |
210 |
Dam Height |
21 |
River Or Stream |
TRIB DOUGLAS CREEK |
Primary Dam Type |
Earth |
Nid Storage |
165 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
21 |
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.
Spring Lake Road Dam