Lillard Mill Reservoir Report
Nearby: Mcminnville Water Supply Big Oak
Last Updated: December 13, 2025
Lillard Mill, located in Marshall, Tennessee, is a concrete dam constructed in 1928 with a primary purpose of water supply.
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Summary
Standing at a hydraulic height of 12.2 feet and a structural height of 15.8 feet, the dam boasts a storage capacity of 556 acre-feet and serves a drainage area of 918 acres. The dam, situated on the Duck River under the jurisdiction of the Tennessee Safe Dams Program, is regulated, permitted, inspected, and enforced by the state, ensuring its safety and functionality for the local community.
With a significant hazard potential but a satisfactory condition assessment as of September 2019, Lillard Mill remains a crucial water resource infrastructure in the region. The dam covers a surface area of 54 acres and has a spillway type classified as uncontrolled. Despite not having outlet gates, the dam's moderate risk rating indicates a level of risk management in place. The inspection frequency of twice a year ensures that any potential issues are promptly identified and addressed, contributing to the overall safety and reliability of the structure for water supply purposes.
As part of the Nashville District, Lillard Mill plays a vital role in managing water resources in the area, offering a reliable source of water for the community. With its historical significance dating back to nearly a century, the dam continues to serve its primary function while being subject to state regulations and inspections. The dam's presence on the Duck River underscores its importance in maintaining water security and highlights the collaborative efforts between local governments and regulatory agencies to ensure its continued operation and safety.
Year Completed |
1928 |
Dam Length |
219 |
River Or Stream |
DUCK RIVER |
Primary Dam Type |
Concrete |
Surface Area |
54 |
Hydraulic Height |
12.2 |
Drainage Area |
918 |
Nid Storage |
556 |
Structural Height |
15.8 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Duck River Above Milltown
|
627cfs |
Big Rock Cr At Double Bridges
|
3cfs |
Fountain Creek Near Fountain Heights
|
3cfs |
Duck River At Columbia
|
785cfs |
Fall Creek Near Deason
|
0cfs |
Duck River Near Shelbyville
|
339cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Lillard Mill
Lillard's Mill Launch Area