Old Stone Fort Reservoir Report

Last Updated: December 5, 2025

Old Stone Fort, a state-regulated dam located in Coffee, Tennessee, stands as a crucial structure on the Duck River.


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Summary

Built in 1962, this concrete dam boasts a height of 10.3 feet and a length of 190 feet, providing a storage capacity of 68 acre-feet. With a surface area of 17 acres and a drainage area of 0.09 square miles, the dam plays a significant role in managing water resources in the region.

Despite its age, Old Stone Fort maintains a satisfactory condition assessment and a significant hazard potential, underscoring the importance of regular inspections. The dam is equipped with uncontrolled spillways and has no outlet gates, emphasizing the need for vigilant monitoring and maintenance. The Tennessee Safe Dams Program oversees the state's regulatory efforts, ensuring that the dam meets safety standards and emergency preparedness guidelines.

As water resource and climate enthusiasts, the preservation and upkeep of Old Stone Fort are essential to safeguarding the surrounding communities and ecosystems. With a moderate risk assessment rating, proactive risk management measures must be implemented to mitigate potential hazards and ensure the long-term resilience of this critical infrastructure. The collaboration between state agencies and stakeholders is vital in protecting this valuable water resource for future generations.

Year Completed

1962

Dam Length

190

River Or Stream

DUCK RIVER

Primary Dam Type

Concrete

Surface Area

17

Hydraulic Height

10.3

Drainage Area

0.09

Nid Storage

68

Structural Height

10.3

Outlet Gates

None

Hazard Potential

Significant

Nid Height

10
       
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.