Doyle Lake Dam Reservoir Report

Last Updated: December 5, 2025

Doyle Lake Dam, located in the city of Wilmington, offstream of Trib Jordan Creek in Illinois, was completed in 1973 by the Joliet Army Ammunition Plant.


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Summary

This Federal-owned dam serves a primary purpose of recreation, offering a storage capacity of 142 acre-feet and a normal storage of 43 acre-feet. With a low hazard potential and a moderate risk assessment rating of 3, the dam is regulated by the Illinois Department of Natural Resources and undergoes regular inspections as part of its state-permitting and enforcement obligations.

The earth-type dam stands at a height of 14 feet and spans a length of 900 feet, with an uncontrolled spillway width of 17 feet. Despite having no outlet gates, the dam's structure, classified as a buttress core type with an unknown foundation, is designed to accommodate the recreational activities in the area. While the condition assessment is currently not available, the dam's emergency action plan status and risk management measures are yet to be determined, highlighting the need for ongoing monitoring and maintenance to ensure the safety of the surrounding community and water resource.

In the picturesque setting of Will County, Illinois, water resource and climate enthusiasts can appreciate the environmental significance of Doyle Lake Dam in sustaining the local ecosystem and providing a recreational haven for visitors. With its strategic location and historical background tied to the Joliet Army Ammunition Plant, the dam serves as a reminder of the intersection between human development and natural landscapes, urging a balanced approach towards water management and conservation efforts in the region.

Year Completed

1973

Dam Length

900

Dam Height

14

River Or Stream

TRIB JORDAN CREEK

Primary Dam Type

Earth

Nid Storage

142

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

14
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.