Jack T William's Dam Reservoir Report

Last Updated: December 5, 2025

Jack T William's Dam, located in Sevier County, Arkansas, is a privately owned structure that serves primarily for recreation purposes.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1986, this earth dam stands at a height of 53 feet and has a length of 850 feet, with a storage capacity of 820 acre-feet. Situated on the Cossatot River-TR, this dam provides a surface area of 35 acres for water enthusiasts to enjoy various recreational activities.

Managed by the Arkansas Natural Resources Commission (ANRC), Jack T William's Dam is regulated and inspected by the state, ensuring compliance with safety standards. With a low hazard potential and a condition assessment of "Not Rated", this dam poses minimal risk to the surrounding area. Despite not having a spillway, the dam's maximum discharge capacity is 4286 cubic feet per second, further enhancing its safety measures.

Although the last inspection was conducted in 2011, the dam's emergency action plan status and risk management measures remain unknown. Nevertheless, with its picturesque location and contribution to recreational opportunities along the Cossatot River, Jack T William's Dam stands as a valuable asset for water resource and climate enthusiasts alike.

Year Completed

1986

Dam Length

850

Dam Height

53

River Or Stream

COSSATOT RIVER-TR

Primary Dam Type

Earth

Surface Area

35

Drainage Area

1

Nid Storage

820

Hazard Potential

Low

Nid Height

53
       
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.