Half Moon Lake Reservoir Report

Last Updated: December 12, 2025

Half Moon Lake in Cheatham, Tennessee is a private water resource primarily used for recreation.


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Summary

The lake, fed by the TRIBPERIWINKLE BRANCH, has a surface area of 2.5 acres and a maximum storage capacity of 35 acre-feet. With a hydraulic height of 20.8 feet and a structural height of 25.3 feet, Half Moon Lake serves as a serene getaway for water and climate enthusiasts looking to enjoy outdoor activities in a picturesque setting.

Despite being unregulated by the state and having a low hazard potential, Half Moon Lake is subject to moderate risk due to its location and design. The dam, classified as an Earth type, stands at a height of 25 feet and is equipped with an uncontrolled spillway. Although not currently rated for its condition, the lake undergoes inspections every five years to ensure its safety and functionality. With a history of maintenance and a focus on risk management, Half Moon Lake provides a safe and enjoyable environment for visitors to appreciate and protect.

As a private water resource in the Nashville District, Half Moon Lake offers a unique opportunity for recreation and relaxation in the heart of Tennessee. With its tranquil waters and surrounding natural beauty, the lake serves as a valuable asset for the community and a reminder of the importance of sustainable water management practices. Whether for fishing, boating, or simply enjoying the outdoors, Half Moon Lake is a hidden gem waiting to be explored by water resource and climate enthusiasts alike.

Dam Length

311

River Or Stream

TRIBPERIWINKLE BRANCH

Primary Dam Type

Earth

Surface Area

2.5

Hydraulic Height

20.8

Drainage Area

0.06

Nid Storage

35

Structural Height

25.3

Outlet Gates

None

Hazard Potential

Low

Nid Height

25
       
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.