Franklin Waterworks Res. Reservoir Report

Last Updated: December 11, 2025

Franklin Waterworks Reservoir, located in Williamson County, Tennessee, is a vital source of water supply for the city of Franklin.


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Summary

This earth dam structure was completed in 1950 and has a hydraulic height of 13 feet, with a structural height of 14.8 feet. The reservoir has a normal storage capacity of 348 acre-feet and covers a surface area of 30.4 acres, serving as a key resource for the community's water needs.

Managed by the Tennessee Safe Dams Program, Franklin Waterworks Reservoir is subject to regular inspections and enforcement measures to ensure its safe operation. With a high hazard potential due to its location near the Harpeth River, the dam is rated as being in satisfactory condition. Despite the moderate risk assessment, the reservoir meets guidelines for emergency action planning, although specific measures and risk management strategies are not currently detailed.

As a critical infrastructure asset in the region, Franklin Waterworks Reservoir plays a crucial role in water resource management and climate resilience efforts. With its strategic location and importance for the local community, continued monitoring and maintenance of the dam are essential to safeguarding water supply and mitigating potential risks associated with its operation.

Year Completed

1950

Dam Length

4340

River Or Stream

HARPETH RIVER (PUMPED)

Primary Dam Type

Earth

Surface Area

30.4

Hydraulic Height

13

Drainage Area

0.05

Nid Storage

395

Structural Height

14.8

Outlet Gates

None

Hazard Potential

High

Nid Height

15
       
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.