Macalexander #1 Reservoir Report
Nearby: Poplar Tree Chase #2
Last Updated: December 13, 2025
Macalexander #1, a privately owned earth dam located in Memphis, Tennessee, was completed in 1938 to control water flow from the TRIBMISSISSIPPI RIVER.
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Summary
With a hydraulic height of 20.5 feet and a structural height of 22.5 feet, the dam spans 220 feet in length and has a storage capacity of 61 acre-feet. Despite being classified as having a low hazard potential, the dam is considered to have a moderate risk level, highlighting the importance of ongoing risk management measures.
Although Macalexander #1 is not regulated by the state of Tennessee, it undergoes inspections every five years, with the last inspection conducted in March 2020. The dam's condition is currently listed as "Not Rated," and it does not have an Emergency Action Plan (EAP) in place. Despite these factors, the dam's risk level is closely monitored, and measures are in place to mitigate potential issues. In the event of an emergency, the dam's owners will have to implement appropriate measures to ensure public safety and prevent flooding.
With its uncontrolled spillway and lack of outlet gates, Macalexander #1 presents unique challenges for its owners in terms of managing water flow and ensuring structural integrity. The dam's location near the Mississippi River tributary adds to its importance in regulating water levels and protecting surrounding areas from potential flooding. As water resource and climate enthusiasts, understanding the nuances of dams like Macalexander #1 is crucial for ensuring the sustainable management of water resources and the protection of communities in flood-prone regions.
Year Completed |
1938 |
Dam Length |
220 |
River Or Stream |
TRIBMISSISSIPPI RIVER |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
20.5 |
Drainage Area |
0.1 |
Nid Storage |
61 |
Structural Height |
22.5 |
Outlet Gates |
None |
Hazard Potential |
Low |
Nid Height |
23 |
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.
Macalexander #1
West Pleasant View Road Shelby County