Lake Alexander Dam Reservoir Report

Last Updated: December 12, 2025

Lake Alexander Dam, located in Putnam, Missouri, is a privately-owned structure primarily used for irrigation purposes.


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Summary

Completed in 2004, this earth-type dam stands at a height of 42 feet, with a hydraulic height of 37 feet. It has a storage capacity of 2172 acre-feet and covers a surface area of 102 acres. The dam regulates water flow from the tributary Barber Creek, serving the surrounding area for irrigation and recreational activities.

Managed by the DAM AND RESERVOIR SAFETY PROG, the Lake Alexander Dam is subject to state regulations, inspections, and enforcement to ensure its safety and functionality. Despite being classified as having a significant hazard potential, the dam's condition assessment in 2008 deemed it satisfactory. The risk assessment for the structure is moderate, indicating a level 3 risk. With a last inspection date in March 2018 and an inspection frequency of 5 years, efforts are in place to monitor and maintain the dam's integrity.

While the dam has not experienced any major modifications or incidents, it is crucial for water resource and climate enthusiasts to stay informed about its risk management measures and emergency preparedness. With its vital role in irrigation and recreation, Lake Alexander Dam serves as a significant resource in the region, highlighting the importance of ongoing monitoring and maintenance to ensure its continued functionality and safety.

Year Completed

2004

Dam Length

950

Dam Height

42

River Or Stream

TRIB. BARBER CREEK

Surface Area

102

Hydraulic Height

37

Drainage Area

1774

Nid Storage

2172

Structural Height

42

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

42
       
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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.