Jug Lake Dam Reservoir Report
Last Updated: January 12, 2026
Located in Adams County, Illinois, Jug Lake Dam is a privately-owned structure with a primary purpose of recreation.
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Summary
Built in 1951 by USDA NRCS, this earth dam stands at a height of 31 feet and stretches 242 feet in length. It holds a normal storage capacity of 43 acre-feet and has a low hazard potential. The dam is regulated by the Illinois Department of Natural Resources and undergoes regular inspections to ensure its safety.
Situated on the TRIB SAND BRANCH ROCK CREEK, Jug Lake Dam's spillway is uncontrolled with a width of 35 feet. The dam is classified as having a moderate risk level and is in good condition based on the most recent assessment. While the exact storage and drainage areas are unspecified, the dam plays a crucial role in providing recreational opportunities for the local community. With its picturesque location and historical significance, Jug Lake Dam serves as a vital resource for water enthusiasts and climate advocates alike.
Managed by private owners, Jug Lake Dam has not undergone major modifications since its completion. Despite its age, the dam continues to meet regulatory guidelines and operates effectively for recreational purposes. With the support of the Natural Resources Conservation Service and the Illinois state government, Jug Lake Dam stands as a testament to the importance of preserving water resources and adapting to changing climate conditions. Its role in providing both leisure and environmental benefits underscores the significance of sustainable water management practices in the face of a changing climate.
Year Completed |
1951 |
Dam Length |
242 |
Dam Height |
31 |
River Or Stream |
TRIB SAND BRANCH ROCK CREEK |
Primary Dam Type |
Earth |
Nid Storage |
69 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bear Creek Near Marcelline
|
5cfs |
Wyaconda River Above Canton
|
13cfs |
South Fabius River Near Taylor
|
12cfs |
North River At Palmyra
|
28cfs |
Bear Creek At Hannibal
|
5cfs |
Salt River Near New London
|
74cfs |
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.
Jug Lake Dam