Lake Anne Reservoir Report
Nearby: Henegar Lakewood Park #1
Last Updated: December 12, 2025
Lake Anne, also known as Lake Anne Koko, is a privately owned reservoir located in Cannon, Tennessee.
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Summary
Built in 1967 by the USDA-SCS, this earth dam stands at a height of 29.6 feet, with a hydraulic height of 22 feet and a NID height of 30 feet. With a storage capacity of 446 acre-feet and a surface area of 27 acres, Lake Anne serves primarily for flood risk reduction, but also for fire protection and as a stock or small fish pond.
Situated on the Smithson Branch river, Lake Anne covers a drainage area of 2.35 square miles and has a normal storage capacity of 175 acre-feet. The dam's spillway type is uncontrolled, with a spillway width of 0 feet, and it has no outlet gates. While the dam is currently rated as in "not rated" condition, its hazard potential is marked as significant. Despite its moderate risk assessment, Lake Anne's emergency action plan (EAP) status is unknown, highlighting the need for improved risk management measures and preparedness in the event of a potential hazard.
With its picturesque surroundings and vital role in flood risk reduction, Lake Anne is a valuable water resource in the Clearmont area. As water resource and climate enthusiasts, monitoring the condition and management of Lake Anne can help ensure its continued efficacy in protecting the local community from flooding and supporting biodiversity in the region.
Year Completed |
1967 |
Dam Length |
610 |
River Or Stream |
SMITHSON BRANCH |
Primary Dam Type |
Earth |
Surface Area |
27 |
Hydraulic Height |
22 |
Drainage Area |
2.35 |
Nid Storage |
446 |
Structural Height |
29.6 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
30 |
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.
Lake Anne