Cobb Creek Reservoir Report

Nearby: Holt Powell

Last Updated: December 6, 2025

Cobb Creek in Haywood, Tennessee, is a state-regulated earth dam completed in 1979 with a structural height of 26 feet and a length of 1100 feet.


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Summary

The dam has a normal storage capacity of 73 acre-feet and a maximum storage of 204 acre-feet, serving the primary purpose of water resource management. Although the dam has a low hazard potential and is currently rated as satisfactory in condition, it undergoes regular inspections by the Tennessee Safe Dams Program to ensure its safety and effectiveness.

Situated within the Memphis District and under the jurisdiction of the Tennessee Safe Dams Program, Cobb Creek serves as a crucial structure for managing water resources in the area. With a drainage area of 0.4 square miles and a surface area of 20 acres, the dam plays a vital role in flood control and water supply for the surrounding community of Allens. Despite its moderate risk assessment, the dam has not undergone significant modifications in recent years and has no associated locks or outlet gates.

Overall, Cobb Creek dam stands as a reliable and essential component of Tennessee's water infrastructure, providing valuable services for both water resource management and flood control. With its dedicated state oversight and regular inspections, the dam continues to fulfill its purpose effectively while ensuring the safety of the surrounding area and its residents.

Year Completed

1979

Dam Length

1100

River Or Stream

COBB CREEK

Primary Dam Type

Earth

Surface Area

20

Drainage Area

0.4

Nid Storage

204

Structural Height

26

Outlet Gates

None

Hazard Potential

Low

Nid Height

26
       
Seasonal Comparison

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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.