Squaw Lake(Dan Maddox) Reservoir Report

Last Updated: December 5, 2025

Squaw Lake (Dan Maddox) is a privately owned Earth type dam located in Lewis County, Tennessee.


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Summary

Completed in 1963, this dam stands at a structural height of 44.5 feet with a hydraulic height of 33 feet, impounding the waters of Squaw Branch. The reservoir has a normal storage capacity of 862 acre-feet and a maximum storage capacity of 1500 acre-feet, covering a surface area of 56 acres.

With a drainage area of 2.57 square miles, Squaw Lake serves as a critical water resource in the region. The dam's spillway type is listed as uncontrolled, with a spillway width of 0 feet. Although the hazard potential of the dam is deemed significant and the condition assessment is currently not rated, the risk assessment is moderate (3), highlighting the importance of ongoing monitoring and maintenance efforts.

Despite not being under state jurisdiction, Squaw Lake plays a vital role in the local ecosystem and water supply. The dam does not have any associated locks or outlet gates, and the last inspection was conducted in October 2018. With a focus on risk management and safety measures, Squaw Lake serves as a valuable asset in the management of water resources in the Nashville District.

Year Completed

1963

Dam Length

565

River Or Stream

SQUAW BRANCH

Primary Dam Type

Earth

Surface Area

56

Hydraulic Height

33

Drainage Area

2.57

Nid Storage

1500

Structural Height

44.5

Outlet Gates

None

Hazard Potential

Significant

Nid Height

45
       
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.