Longwood Reservoir Report
Nearby: Lakewood Trails Halle Park
Last Updated: December 6, 2025
Located in Memphis, Tennessee, Longwood is a privately owned dam on the TRIBWOLF RIVER, built in 1965 primarily for state-regulated purposes.
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Summary
Standing at a structural height of 10.7 feet and a hydraulic height of 9.4 feet, Longwood has a NID height of 11 feet and a length of 725 feet, providing a storage capacity of 44 acre-feet. With a drainage area of 0.03 square miles and a surface area of 6.4 acres, the dam poses a significant hazard potential but has been deemed to be in satisfactory condition as of the last inspection in September 2020.
Managed by the Tennessee Safe Dams Program, Longwood's spillway is uncontrolled and the dam lacks outlet gates. The risk assessment for Longwood is rated as moderate (3), indicating a need for appropriate risk management measures. While the dam has not been modified in recent years, it undergoes inspections every two years to ensure its continued safety and functionality. Longwood's proximity to the Wolf River and its vital role in water resource management make it a key structure in the region for both water resource and climate enthusiasts to monitor and study.
Overall, Longwood serves as a crucial infrastructure for water storage and regulation in Shelby County, Tennessee, contributing to flood control and water supply management in the area. With its satisfactory condition and state-regulated status, Longwood stands as a significant yet manageable risk, highlighting the importance of regular inspections and risk assessment for the safety and security of the surrounding communities. For water resource and climate enthusiasts, Longwood presents a fascinating case study in dam construction, regulation, and maintenance within the context of a changing climate and evolving water management practices.
Year Completed |
1965 |
Dam Length |
725 |
River Or Stream |
TRIBWOLF RIVER |
Primary Dam Type |
Earth |
Surface Area |
6.4 |
Hydraulic Height |
9.4 |
Drainage Area |
0.03 |
Nid Storage |
44 |
Structural Height |
10.7 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Nid Height |
11 |
Seasonal Comparison
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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.
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