Glenn Circle East Dam Reservoir Report

Last Updated: December 5, 2025

Glenn Circle East Dam, located in Plainfield, Illinois, along Wolf Creek, was completed in 2003 by INTECH and serves as a crucial flood risk reduction structure in the area.


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Summary

The earth dam stands at a height of 7 feet and spans 100 feet in length, with a storage capacity of 274 acre-feet. Despite its low hazard potential and moderate risk assessment, the dam is state-regulated by the Illinois Department of Natural Resources (IDNR) and undergoes inspections every five years to ensure its structural integrity.

Owned privately, Glenn Circle East Dam has a primary purpose of flood risk reduction, with its design classified as an earth dam with buttress core types. The dam does not feature any outlet gates or controlled spillways, but its uncontrolled spillway width is recorded as 0. The surrounding area of Will County, Illinois, benefits from the dam's presence, offering protection against potential flooding events. With Lauren Underwood (D) serving as the Congressional Representative for the district, the dam remains an essential component of the region's water resource management infrastructure.

Water resource and climate enthusiasts can appreciate the significance of Glenn Circle East Dam in mitigating flood risks along Wolf Creek in Plainfield, Illinois. As a state-regulated structure with a low hazard potential, the dam plays a crucial role in safeguarding the surrounding community from potential inundation. Its completion in 2003 and continued state oversight ensure that the dam remains a reliable flood risk reduction measure in the region. The structure's design, construction, and operational details provide valuable insights for those interested in water resource management and climate adaptation efforts in the area.

Year Completed

2003

Dam Length

100

Dam Height

7

River Or Stream

WOLF CREEK

Primary Dam Type

Earth

Nid Storage

274

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

7
       
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.