Wynstone Boulevard Dam Reservoir Report

Last Updated: December 5, 2025

The Wynstone Boulevard Dam in Shorewood, Illinois, is a privately owned structure designed by Edmund M Burke Engineering to reduce flood risk along the Hammel Creek.


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Summary

Located in Will County, this earth dam stands at a height of 8 feet and stretches 49 feet in length, with a storage capacity of 83 acre-feet. Despite being classified as low-hazard, the dam is regulated by the Illinois Department of Natural Resources (IDNR) and undergoes regular inspections to ensure its safety and functionality.

With its primary purpose being flood risk reduction, the Wynstone Boulevard Dam plays a crucial role in protecting the surrounding area from potential water-related disasters. Even though the dam's condition assessment is currently not available, its risk assessment is moderate, indicating a need for continued monitoring and maintenance. The dam features an uncontrolled spillway type and no outlet gates, emphasizing the importance of proper management and emergency preparedness in the event of a sudden increase in water levels.

As part of the Chicago District, the Wynstone Boulevard Dam serves as a vital component in the local water resource management system. With its strategic location and design tailored to mitigate flood risks, this structure exemplifies the intersection of engineering, environmental stewardship, and climate resilience in safeguarding communities against the impacts of extreme weather events.

Dam Length

49

Dam Height

8

River Or Stream

HAMMEL CREEK

Primary Dam Type

Earth

Drainage Area

1.84

Nid Storage

83

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

8
       
Seasonal Comparison

Weather Forecast

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.