Jones Pond Dam Reservoir Report
Nearby: Carlson Lake Dam Bartlett Pond Dam 2
Last Updated: December 21, 2025
Jones Pond Dam, located in Alton, Illinois, was completed in 1975 and serves primarily as a recreational site.
°F
°F
mph
Wind
%
Humidity
Summary
The dam, with a height of 25 feet and a length of 225 feet, is classified as an earth dam with a buttress core type. Despite its low hazard potential, the dam is state-regulated by the Illinois Department of Natural Resources, with regular inspections and enforcement measures in place to ensure its safety and compliance with regulations.
Owned privately, Jones Pond Dam sits on the Trib Piasa Creek offstream and has a storage capacity of 43 acre-feet. Its uncontrolled spillway and outlet gates suggest a simpler design, emphasizing its primary purpose of recreation rather than flood control or water resource management. The dam's risk assessment indicates a moderate level of risk, with a condition assessment currently not available.
In terms of emergency preparedness, the dam's Emergency Action Plan status is unknown, highlighting a potential area for improvement. While the dam's overall risk level is moderate, its low hazard potential and regular state oversight provide some assurance to water resource and climate enthusiasts interested in Jones Pond Dam.
Year Completed |
1975 |
Dam Length |
225 |
Dam Height |
25 |
River Or Stream |
TRIB PIASA CREEK-OFFSTREAM |
Primary Dam Type |
Earth |
Nid Storage |
43 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
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.
Jones Pond Dam