Mononame 662 Reservoir Report

Last Updated: December 5, 2025

Mononame 662 is a privately owned earth dam located in Knob Lick, Missouri, along the TR Wachita Creek.


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Summary

Constructed in 1960, this recreational structure stands at a height of 15 feet and has a storage capacity of 225 acre-feet. With a surface area of 28 acres and a drainage area of 25 acres, this dam serves as a low hazard potential water resource for the surrounding area.

Although Mononame 662 is not regulated by the state and has not been inspected or rated for its condition, it continues to provide recreational opportunities for the community. With its primary purpose being defined as recreation, this dam offers a peaceful retreat for water and climate enthusiasts to enjoy the outdoors. While the dam's emergency preparedness measures have not been fully documented, its low hazard potential suggests a relatively low risk to the area.

Despite the lack of formal assessments and regulatory oversight, Mononame 662 remains a valuable resource for the community, offering a tranquil environment for recreational activities. Its location in St. Francois County, Missouri, and proximity to the St. Louis District make it a convenient destination for those seeking to connect with nature and enjoy water-based activities. As efforts to enhance the dam's safety and emergency preparedness continue, this structure will likely remain a beloved spot for water resource and climate enthusiasts in the region.

Year Completed

1960

Dam Height

15

River Or Stream

TR WACHITA CREEK

Primary Dam Type

Earth

Surface Area

28

Drainage Area

25

Nid Storage

225

Structural Height

15

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

15
       
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.