Casson Pond Dam Reservoir Report

Last Updated: December 20, 2025

Casson Pond Dam, located in Doddsville, Illinois, is a privately owned structure constructed in 1984 by Freeman United Coal Mining Co.


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Summary

The earth dam stands at a height of 26 feet and spans 315 feet in length, with a storage capacity of 73 acre-feet. Situated on Trib Grindstone Creek, the dam serves multiple purposes, including flood control and water storage, with a low hazard potential rating and a moderate risk assessment.

Managed by the Illinois Department of Natural Resources, Casson Pond Dam is regularly inspected, with the last assessment conducted in July 2018. The dam features an uncontrolled spillway and outlet gates, with a maximum discharge capacity of 1040 cubic feet per second. Despite its age, the dam's condition assessment is currently listed as "Not Available," indicating a need for further evaluation of its structural integrity and maintenance requirements to ensure continued safety and functionality.

With its tranquil setting and vital role in managing water resources in the region, Casson Pond Dam stands as a testament to the importance of maintaining and monitoring infrastructure for climate and water resource enthusiasts. As efforts to address climate change and water scarcity intensify, the proper management and upkeep of dams like Casson Pond will be crucial in ensuring the resilience and sustainability of our water systems for future generations.

Year Completed

1984

Dam Length

315

Dam Height

26

River Or Stream

TRIB GRINDSTONE CREEK

Primary Dam Type

Earth

Surface Area

587

Drainage Area

0.1

Nid Storage

73

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

26
       
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.