Lake Rhonda Reservoir Report

Last Updated: December 7, 2025

Lake Rhonda, located in Gibbs, Missouri, is a privately owned earth dam structure built in 1998 for grade stabilization purposes along the Timber Branch river.


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Summary

The dam stands at a height of 27.4 feet with a hydraulic height of 24 feet and a structural height of 23 feet. With a maximum storage capacity of 26 acre-feet and a normal storage of 15 acre-feet, Lake Rhonda covers a surface area of 1 acre and serves a drainage area of 32 square miles.

Despite its relatively low hazard potential and moderate risk assessment level, Lake Rhonda's condition assessment remains unrated, with no recent inspection data available. The spillway type for this dam is uncontrolled with a width of 10 feet, and it does not have any outlet gates. Even though it is not under state regulation or permitting, Lake Rhonda plays a crucial role in managing water resources in the area and contributes to the overall environmental sustainability of the region.

Lake Rhonda is a noteworthy water resource structure in Adair County, Missouri, providing essential grade stabilization functions along the Timber Branch river. While it may not be actively monitored or regulated by state agencies, its presence is crucial for maintaining the surrounding ecosystem and managing water flows efficiently. As climate change continues to impact water resources, structures like Lake Rhonda become increasingly important for sustainable water management practices in the region.

Year Completed

1998

Dam Length

383

Dam Height

27.4

River Or Stream

TIMBER BRANCH

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

24

Drainage Area

32

Nid Storage

26

Structural Height

23

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

27
       
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.