Cedar Dam Reservoir Report
Nearby: Pin Oak Dam Redbud Dam
Last Updated: December 6, 2025
Cedar Dam, also known as Cedar Lake or Haley Creek Dam, is a Federal-owned structure designed by the Tennessee Valley Authority (TVA) in Tennessee.
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Summary
Completed in 1963, the dam serves primarily for flood risk reduction along the Haley Creek, with additional purposes including recreation. The dam is an earth-type structure with a height of 27 feet and a length of 750 feet, holding a normal storage capacity of 870 acre-feet and a maximum storage of 1090 acre-feet.
Situated in Henderson County, Tennessee, Cedar Dam poses a high hazard potential and has a moderate risk assessment. The dam features an uncontrolled spillway with a width of 200 feet and multiple outlet gates including other controlled mechanisms and slide gates. The inspection frequency for Cedar Dam is every 2 years, with the last inspection conducted in December 2020. While the condition assessment is not available, the Emergency Action Plan (EAP) status and risk management measures for the dam are also currently undefined.
Water resource and climate enthusiasts interested in Cedar Dam can observe its critical role in flood risk reduction along the Haley Creek in Tennessee. Managed by the Tennessee Valley Authority, the dam's design and construction uphold safety standards, although certain aspects such as condition assessment and emergency preparedness require further evaluation. With its important functions and features, Cedar Dam stands as a significant structure for both water management and public safety in the region.
Year Completed |
1963 |
Dam Length |
750 |
Dam Height |
27 |
River Or Stream |
HALEY CREEK |
Primary Dam Type |
Earth |
Surface Area |
142 |
Hydraulic Height |
26 |
Drainage Area |
4.4 |
Nid Storage |
1090 |
Structural Height |
27 |
Outlet Gates |
Other Controlled, Slide (sluice gate) |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
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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.
Cedar Dam