Mary's Creek #9 Reservoir Report
Nearby: Mary's Creek #8 Mary's Creek #7
Last Updated: December 13, 2025
Mary's Creek #9, also known as Marys Creek Dam 9, is a vital flood risk reduction structure located in Shelby, Tennessee.
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Summary
Built in 1962 by the USDA NRCS, this earth dam stands at a hydraulic height of 16.6 feet and a structural height of 26.1 feet, with a length of 700 feet. The dam has a maximum storage capacity of 185 acre-feet and serves multiple purposes including fire protection, stock or small fish pond, and flood risk reduction along the TRIBMARY'S CREEK.
Despite its importance, Mary's Creek #9 has been classified as having a significant hazard potential and an unsatisfactory condition assessment. The dam is under the jurisdiction of the Tennessee Safe Dams Program and undergoes regular inspections, with the last one conducted in April 2018. The dam's emergency action plan status and risk management measures are currently unknown, highlighting the need for continued monitoring and maintenance to ensure the safety and reliability of this critical water resource infrastructure in the region.
Year Completed |
1962 |
Dam Length |
700 |
River Or Stream |
TRIBMARY'S CREEK |
Primary Dam Type |
Earth |
Surface Area |
10.5 |
Hydraulic Height |
16.6 |
Drainage Area |
0.32 |
Nid Storage |
185 |
Structural Height |
26.1 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Mary's Creek #9