Mt. Olive City Lake Dam Reservoir Report
Nearby: Lake Ka-Ho 2 Dam Lake Ka-Ho 1 Dam
Last Updated: December 30, 2025
Located in Eager-ville, Illinois, the Mt.
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Summary
Olive City Lake Dam is a vital water resource infrastructure managed by the local government. Built in 1938 by the USDA NRCS, this earth dam stands at a height of 31 feet and spans 470 feet in length, creating a reservoir with a normal storage capacity of 457 acre-feet. The dam serves primarily for water supply, drawing water from Panther Creek to meet the needs of the surrounding community.
Managed by the Illinois Department of Natural Resources, the Mt. Olive City Lake Dam is regulated, inspected, and enforced to ensure its safety and functionality for water management. With a low hazard potential and moderate risk assessment, this dam plays a crucial role in water resource management in Macoupin County, Illinois. Despite its age, the dam continues to serve its purpose effectively, with no reported condition assessment indicating any immediate concerns for its structural integrity.
Surrounded by a surface area of 2 acres and draining a small watershed of 0.01 square miles, the Mt. Olive City Lake Dam stands as a testament to sustainable water management practices. While lacking detailed risk management measures and emergency action plans, the dam remains a key component of the local water infrastructure, providing essential water supply services to the community. For water resource and climate enthusiasts, the Mt. Olive City Lake Dam represents a blend of historical significance and modern-day utility in managing water resources in Illinois.
Year Completed |
1938 |
Dam Length |
470 |
Dam Height |
31 |
River Or Stream |
PANTHER CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
0.01 |
Nid Storage |
657 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
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.
Mt. Olive City Lake Dam