Beil Lake 1 South Dam Reservoir Report
Nearby: Beil Lake 2 Dam Beil Lake 1 East Dam
Last Updated: December 25, 2025
Beil Lake 1 South Dam, located in St.
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Summary
Clair County, Illinois, is a privately owned earth dam constructed in 1942 for the primary purpose of recreation. The dam stands at 31 feet high and has a length of 180 feet, providing a storage capacity of 122 acre-feet. Situated on the tributary of Douglas Creek, this dam is regulated by the Illinois Department of Natural Resources (IDNR) and undergoes regular inspections to ensure its structural integrity.
Despite its low hazard potential, Beil Lake 1 South Dam poses a high risk due to its condition assessment being unavailable. The dam does not have a spillway and is not equipped with outlet gates. While emergency action plans and risk management measures are not specified, the dam's location in a high-risk area underscores the importance of proactive monitoring and maintenance. The dam's association with recreation highlights the critical role it plays in providing water resource benefits to the surrounding community.
Overall, Beil Lake 1 South Dam serves as a vital structure for water storage and recreational activities in the region. Its historical significance and management by state regulatory agencies emphasize the importance of maintaining and monitoring dams to ensure public safety and water resource sustainability in the face of changing climatic conditions.
Year Completed |
1942 |
Dam Length |
180 |
Dam Height |
31 |
River Or Stream |
TRIB DOUGLAS CREEK |
Primary Dam Type |
Earth |
Nid Storage |
122 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Richland Creek Near Hecker
|
13cfs |
Silver Creek Near Freeburg
|
28cfs |
Martigney Creek Near Arnold
|
0cfs |
Kaskaskia River At New Athens
|
551cfs |
Mississippi River At St. Louis
|
78100cfs |
Gravois Creek Near Mehlville
|
4cfs |
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.
Beil Lake 1 South Dam