Mcminn Lake #2 Dam Reservoir Report

Last Updated: April 15, 2026

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Mcminn Lake #2 Dam, located in Patton, Missouri, is a privately owned structure regulated by the state's Dam and Reservoir Safety Program.


Summary

Completed in 2014, this earth dam stands at a height of 55 feet and has a storage capacity of 1,275 acre-feet. With a normal storage capacity of 765 acre-feet, the dam serves the primary purpose of water resource management in the region.

The dam's spillway type is uncontrolled with a width of 6 feet, and it has a high hazard potential but is currently assessed as satisfactory in condition. The last inspection in May 2017 found the structure to be in good shape, meeting regulatory standards. With a drainage area of 742 square miles, the dam plays a crucial role in managing water flow in the tributary of the Little White River.

Despite the moderate risk assessment rating, Mcminn Lake #2 Dam remains an essential component of the local water resource infrastructure. As a significant contributor to the region's water management efforts, ensuring the continued safety and functionality of this dam is paramount for water resource and climate enthusiasts alike.

15-Day Long Term Forecast


Year Completed

2014

Dam Length

700

Dam Height

55

River Or Stream

TRIB. LITTLE WHITE RIVER

Surface Area

65

Hydraulic Height

55

Drainage Area

742

Nid Storage

1275

Structural Height

55

Outlet Gates

Uncontrolled

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

55
       
Seasonal Comparison

5-Day Hourly Forecast Detail

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.
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