Robco Reservoir Report

Last Updated: December 5, 2025

Robco is a private dam located in Memphis, Tennessee, on Horn Lake Creek.


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Summary

Built in 1962, this earth dam stands at a structural height of 25 feet and has a hydraulic height of 13 feet. With a storage capacity of 2148 acre-feet, Robco serves the critical purpose of regulating water flow in the area. It covers a surface area of 191 acres and has a drainage area of 2.55 square miles.

Managed by the Tennessee Safe Dams Program, Robco is subject to regular state regulation, inspection, and enforcement to ensure its structural integrity and safety. The dam has been assessed to have a low hazard potential and is currently in satisfactory condition as of the last inspection in January 2021. Despite moderate risk levels, the dam has not experienced any significant modifications in recent years and does not have an Emergency Action Plan (EAP) in place.

While Robco may not be a high-risk structure, its role in managing water resources in the area is crucial. Given its location in a populated area, continued monitoring and maintenance are essential to prevent any potential risks and ensure the safety of surrounding communities. As water resource and climate enthusiasts, staying informed about the condition and management of dams like Robco is vital for understanding and addressing the challenges posed by changing environmental conditions.

Year Completed

1962

Dam Length

7600

River Or Stream

HORN LAKE CREEK

Primary Dam Type

Earth

Surface Area

191

Hydraulic Height

13

Drainage Area

2.55

Nid Storage

2148

Structural Height

25

Outlet Gates

None

Hazard Potential

Low

Nid Height

25
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.