Langley Pond Dam Reservoir Report

Last Updated: December 22, 2025

Langley Pond Dam, located in Cowden, Illinois, stands as a testament to the importance of water resources in providing recreational opportunities for the community.


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Summary

Completed in 1968, this private-owned earth dam spans 250 feet in length and reaches a height of 34 feet, with a storage capacity of 194 acre-feet. Despite its uncontrolled spillway and outlet gates, the dam has been deemed to have low hazard potential, making it a safer structure for water enthusiasts to enjoy.

Owned by a private entity, Langley Pond Dam is regulated by the Illinois Department of Natural Resources, ensuring that it meets state inspection and enforcement standards. The dam's primary purpose is for recreation, serving as a popular spot for fishing, boating, and other water activities on Langley Pond. With a moderate risk assessment rating of 3, the dam's condition assessment is currently listed as not available, implying the need for further evaluation and management measures to maintain its safety and functionality.

Situated along the tributary of Kaskaskia River, Langley Pond Dam offers a tranquil setting for outdoor enthusiasts to appreciate the intersection of water resources and climate in a recreational context. With its historical significance and ongoing regulatory oversight, this earth dam serves as a valuable asset for the community, highlighting the importance of responsible water management and infrastructure maintenance in the face of changing environmental conditions.

Year Completed

1968

Dam Length

250

Dam Height

34

River Or Stream

TRIB KASKASKIA

Primary Dam Type

Earth

Nid Storage

194

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

34
       
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.