Memphis Union Mission Reservoir Report
Nearby: Macalexander #1 Robertson Lake
Last Updated: December 14, 2025
Memphis Union Mission is a private dam located in Shelby, Tennessee, along the Tribloosahatchie River.
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Summary
This Earth-type dam stands at a hydraulic height of 18.3 feet and has a structural height of 25.3 feet, with a length of 400 feet. Completed in 1958, it serves multiple purposes, including water storage and flood control, with a normal storage capacity of 128 acre-feet and a maximum storage of 261 acre-feet. Despite its low hazard potential, the dam is regularly inspected by the Tennessee Safe Dams Program to ensure its satisfactory condition.
The dam's location in Memphis, under the jurisdiction of the Tennessee Safe Dams Program, highlights the importance of proper regulation and oversight in maintaining water resource infrastructure. With a moderate risk assessment rating of 3, the dam is equipped with emergency action plans and periodic inspections to mitigate potential risks. The dam's proximity to the Memphis District underscores its significance in water management and climate resilience efforts in the region.
As an essential component of the water infrastructure in the area, Memphis Union Mission plays a crucial role in protecting the surrounding community from flooding and ensuring water security. Its satisfactory condition and adherence to regulatory standards demonstrate a commitment to maintaining a safe and reliable water resource for the people of Shelby, Tennessee. Climate enthusiasts and water resource advocates can appreciate the diligence and care taken to manage this vital piece of infrastructure for the benefit of all.
Year Completed |
1958 |
Dam Length |
400 |
River Or Stream |
TRIBLOOSAHATCHIE RIVER |
Primary Dam Type |
Earth |
Surface Area |
17.5 |
Hydraulic Height |
18.3 |
Drainage Area |
0.37 |
Nid Storage |
261 |
Structural Height |
25.3 |
Outlet Gates |
None |
Hazard Potential |
Low |
Nid Height |
25 |
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.
Memphis Union Mission
Island Drive Harbor Town