Acorn Reservoir Report

Last Updated: December 15, 2025

Acorn is a state-regulated earth dam located in Charlotte, Tennessee, along the TRIBJONES CREEK.


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Summary

Built in 1939, Acorn stands at a structural height of 53 feet and has a hydraulic height of 41.7 feet. With a normal storage capacity of 370 acre-feet, the dam serves the purpose of water resource management in the area, controlling a drainage area of 1.44 square miles.

Despite its satisfactory condition assessment as of January 2020, Acorn poses a high hazard potential, prompting a regular inspection frequency of once a year. The dam's spillway is classified as uncontrolled, and it has no outlet gates or associated locks. While the risk assessment for Acorn is moderate, it is crucial for water resource and climate enthusiasts to stay informed about the dam's condition and any potential risk management measures that may be implemented in the future.

As part of the Tennessee Safe Dams Program, Acorn is under the jurisdiction of the state regulatory agency, ensuring that it meets all necessary permitting, inspection, and enforcement requirements. With a storage capacity of 715 acre-feet and a surface area of 26 acres, Acorn plays a vital role in managing water resources in Dickson County. Climate and water resource enthusiasts can appreciate the historical significance and ongoing maintenance efforts of this essential infrastructure.

Year Completed

1939

Dam Length

480

River Or Stream

TRIBJONES CREEK

Primary Dam Type

Earth

Surface Area

26

Hydraulic Height

41.7

Drainage Area

1.44

Nid Storage

715

Structural Height

53

Outlet Gates

None

Hazard Potential

High

Nid Height

53
       
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.