Mcnairycypress Creek #16 Reservoir Report
Nearby: Twin Springs Mcnairycypress Creek #14
Last Updated: December 5, 2025
Mcnairycypress Creek #16, also known as Mcnairy Cypress Creek W/S Dam 18, is a local government-owned structure located in McNairy, Tennessee.
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Summary
This dam, completed in 1982, serves multiple purposes including flood risk reduction, debris control, and providing a habitat for fish and wildlife in the area. The dam is classified as an Earth dam with a stone core and soil foundation, standing at a hydraulic height of 19.7 feet and a structural height of 30 feet.
Managed by the Tennessee Safe Dams Program, this dam has a high hazard potential but is currently assessed as being in satisfactory condition. With a storage capacity of 791 acre-feet, the dam helps to control water flow in the Sibley Branch stream, which has a drainage area of 1.4 square miles. Although the dam does not have outlet gates or a controlled spillway, it has been inspected regularly, with the most recent inspection conducted in April 2020.
Despite its moderate risk assessment rating, Mcnairycypress Creek #16 is an essential structure for flood control and wildlife conservation in the area. With its long history of service and ongoing maintenance, this dam continues to play a vital role in protecting the local community from the impacts of water-related disasters. Climate and water resource enthusiasts will find this dam to be an intriguing example of how infrastructure can both manage environmental risks and support biodiversity in a changing climate.
Year Completed |
1982 |
Dam Length |
940 |
River Or Stream |
SIBLEY BRANCH |
Primary Dam Type |
Earth |
Surface Area |
23.4 |
Hydraulic Height |
19.7 |
Drainage Area |
1.4 |
Nid Storage |
791 |
Structural Height |
30 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Horse Creek Near Savannah
|
87cfs |
Hatchie River Near Walnut
|
153cfs |
Hatchie River At Bolivar
|
944cfs |
Wolf River At Lagrange
|
227cfs |
Bear Creek At Bishop
|
4330cfs |
Middle Fork Forked Deer River Near Fairview
|
166cfs |
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.
Mcnairycypress Creek #16