Cumberland Lake #1 Reservoir Report

Last Updated: December 6, 2025

Cumberland Lake #1 is a privately owned earth dam located in Cumberland, Tennessee, with a structural height of 30.5 feet and a length of 205 feet.


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Summary

Completed in 1990, this dam serves the primary purpose of water storage, with a normal storage capacity of 69 acre-feet and a maximum storage capacity of 325 acre-feet. The dam is regulated by the Tennessee Safe Dams Program and undergoes regular inspections, with the most recent assessment in March 2020 rating its condition as satisfactory.

Situated on Piney Creek in the Nashville District, Cumberland Lake #1 has a low hazard potential and a moderate risk assessment rating. While the dam has no outlet gates or locks, it features an uncontrolled spillway and covers a surface area of 18.5 acres with a drainage area of 2.43 square miles. The dam is not owned or funded by any federal agency, but it meets state regulatory standards and is inspected every three years to ensure its safety and integrity.

Overall, Cumberland Lake #1 plays a crucial role in water resource management in the region, providing storage capacity and flood control benefits. With its satisfactory condition and low hazard potential, the dam serves as a vital infrastructure asset for the surrounding community while adhering to state regulatory requirements to ensure the safety of downstream areas and residents.

Year Completed

1990

Dam Length

205

River Or Stream

PINEY CREEK

Primary Dam Type

Earth

Surface Area

18.5

Drainage Area

2.43

Nid Storage

325

Structural Height

30.5

Outlet Gates

None

Hazard Potential

Low

Nid Height

31
       
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.