Don Manetz Dam Reservoir Report

Last Updated: December 6, 2025

Don Manetz Dam, located in Patterson, Missouri, was completed in 1962 and serves primarily for recreational purposes.


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Summary

This private dam, standing at a height of 20 feet and with a storage capacity of 86 acre-feet, is situated on the Handy Hollow River. Despite its low hazard potential and "Not Rated" condition assessment, Don Manetz Dam does not fall under state regulation or inspection, suggesting a unique level of independence in its management.

With a surface area of 8 acres and a drainage area of 350 acres, Don Manetz Dam offers a tranquil setting for water resource and climate enthusiasts to appreciate the surrounding natural beauty. Although lacking specific spillway information or outlet gates, the dam's design as an earth structure with buttress core types signifies its robust construction. Its location in Wayne County reflects the dedication to preserving water resources for recreational enjoyment in the region.

While Don Manetz Dam may not have received recent assessments or updates, its historical significance as a recreational reservoir in Missouri remains evident. The dam's inclusion in the St. Louis District and its proximity to the community of Patterson underscore its importance in providing both leisure opportunities and water resource management. For those interested in exploring lesser-known water infrastructure, Don Manetz Dam offers a unique glimpse into the intersection of human ingenuity and environmental stewardship.

Year Completed

1962

Dam Height

20

River Or Stream

HANDY HOLLOW

Primary Dam Type

Earth

Surface Area

8

Drainage Area

350

Nid Storage

86

Structural Height

20

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

20
       
Seasonal Comparison

Weather Forecast

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.