Lake Glendale Reservoir Report

Last Updated: December 5, 2025

Lake Glendale, located in Pope County, Illinois, is a captivating water resource nestled within the tranquil surroundings of the forested landscape.


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Summary

Managed by the USDA Forest Service, this earth dam structure was completed in 1938 primarily for recreational purposes, offering a serene escape for water and climate enthusiasts alike. With a dam height of 38 feet and a storage capacity of 1814 acre-feet, the lake provides an idyllic setting for various outdoor activities.

The lake spans across 84 acres with a normal storage capacity of 860 acre-feet, drawing visitors to its scenic shores for boating, fishing, and wildlife observation. Despite its significant hazard potential, Lake Glendale has been assessed as satisfactory in condition, ensuring a safe and enjoyable experience for all who visit. The surrounding forested area, managed by the Forest Service, adds to the appeal of this water resource, making it a popular destination for nature lovers and outdoor enthusiasts seeking solace in the midst of nature's beauty.

From its uncontrolled spillway to its moderate risk assessment, Lake Glendale stands as a testament to the harmonious coexistence of human recreation and nature's bounty. The lake's rich history, dating back to its completion in the late 1930s, adds to its allure as a timeless destination for those seeking respite from the hustle and bustle of modern life. With its picturesque setting and ample opportunities for outdoor recreation, Lake Glendale beckons visitors to immerse themselves in the tranquility of its waters and the serenity of its forested surroundings.

Year Completed

1938

Dam Length

975

Dam Height

38

River Or Stream

TR-SUGAR

Primary Dam Type

Earth

Surface Area

84

Hydraulic Height

31

Drainage Area

2

Nid Storage

1814

Structural Height

38

Hazard Potential

Significant

Nid Height

38
       
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.