Agnew Reservoir Report

Last Updated: December 26, 2025

Agnew, located in Hamilton County, Tennessee, is a privately-owned earth dam constructed in 1961 for fire protection, stock, and recreational purposes.


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Summary

The dam stands at a structural height of 17 feet and a hydraulic height of 14 feet, impounding the waters of Dry Branch to create a small fish pond with a storage capacity of 43 acre-feet. With a surface area of 5 acres and a drainage area of 0.3 square miles, Agnew serves as a vital resource for water storage and recreational activities in the region.

Despite its modest size, Agnew poses a high hazard potential due to its uncontrolled spillway type and lack of outlet gates. The dam has not been rated for its condition assessment, but it undergoes inspections every 5 years to ensure its structural integrity and safety. The risk assessment for Agnew indicates a moderate risk level (3), prompting the need for continued monitoring and potential risk management measures to mitigate any potential hazards associated with the dam.

As an essential component of the local water resource infrastructure, Agnew plays a crucial role in providing water for fire protection and supporting recreational activities in the area. With its high hazard potential and moderate risk level, it is imperative for stakeholders to stay vigilant in monitoring and maintaining the dam to ensure the safety of nearby communities and the sustainability of the water resource for future generations.

Year Completed

1961

Dam Length

275

River Or Stream

DRY BRANCH

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

14

Drainage Area

0.3

Nid Storage

43

Structural Height

17

Outlet Gates

None

Hazard Potential

High

Nid Height

17
       
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.