Duncan Reservoir Report
Nearby: Wells Bear Creek #2
Last Updated: December 6, 2025
Duncan is a local government-owned earth dam located in Fayette, Tennessee, near Liberty Hill, along the Muddy Creek.
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Summary
Built in 1960, this structure stands at a hydraulic height of 15 feet and a structural height of 20 feet, with a length of 270 feet. With a storage capacity of 56 acre-feet, Duncan serves a primary purpose that remains unspecified. The dam has a low hazard potential and is currently in a condition that has not been rated.
Despite its age, Duncan has been regularly inspected, with the last inspection conducted in April 2020. The dam is categorized as having a moderate risk level (3), prompting the need for ongoing risk management measures to ensure its safety and stability. While the dam does not have a regulated state jurisdiction or permitting, it remains an essential water resource structure within the area, contributing to the local water management system. With its uncontrolled spillway and lack of outlet gates, Duncan plays a crucial role in managing water flow and storage for the surrounding area.
Year Completed |
1960 |
Dam Length |
270 |
River Or Stream |
MUDDY CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
15 |
Drainage Area |
0.04 |
Nid Storage |
56 |
Structural Height |
20 |
Outlet Gates |
None |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Hatchie River At Bolivar
|
933cfs |
Wolf River At Lagrange
|
223cfs |
Loosahatchie River Near Arlington
|
122cfs |
Wolf River At Rossville
|
508cfs |
South Fork Forked Deer River Near Owl City
|
524cfs |
Hatchie River At Rialto
|
1080cfs |
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.
Duncan