Mill Branch Reservoir Report

Last Updated: December 5, 2025

Mill Branch is a privately owned earth dam located in Scott, Tennessee.


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Summary

Built in 1950, the dam stands at a structural height of 33.9 feet with a hydraulic height of 30.2 feet. It has a storage capacity of 336 acre-feet and covers a surface area of 21.1 acres, serving the purpose of water resource management in the region.

Despite being non-regulated by the state, Mill Branch has a low hazard potential and a moderate risk assessment rating. The dam does not have outlet gates and features an uncontrolled spillway type. Although its condition is currently not rated, the dam undergoes inspections every 5 years to ensure its safety and integrity for the surrounding community. With its historical significance and impact on the local hydrology, Mill Branch remains a focal point for water resource and climate enthusiasts in Tennessee.

Overall, Mill Branch represents a unique engineering feat that contributes to water storage and management in the area. With its strategic location along the Mill Branch stream, the dam provides valuable insights into the region's hydrological dynamics. As a noteworthy structure in the Louisville District, Mill Branch serves as a reminder of the importance of sustainable water resource practices and the need for continued monitoring and maintenance of critical infrastructure in the face of changing climate conditions.

Year Completed

1950

Dam Length

411

River Or Stream

MILL BRANCH

Primary Dam Type

Earth

Surface Area

21.1

Hydraulic Height

30.2

Drainage Area

0.32

Nid Storage

336

Structural Height

33.9

Outlet Gates

None

Hazard Potential

Low

Nid Height

34
       
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.