Harmony Mission Dam Reservoir Report

Last Updated: December 6, 2025

Harmony Mission Dam, located in Rich Hill, Missouri, stands as a vital water resource structure built by the Missouri Department of Conservation in 1985.


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Summary

With a primary purpose of recreation, this Earth-type dam boasts a height of 42 feet and a length of 1781 feet, creating a reservoir with a storage capacity of 935 acre-feet. The dam, situated on Reed Creek, covers a surface area of 96 acres and serves to regulate the flow of water in the region.

This dam, operated and regulated by the Dam and Reservoir Safety Program in Missouri, has a high hazard potential and undergoes regular inspections to ensure its structural integrity. Its condition was assessed as satisfactory in 2007, with a moderate risk assessment score of 3. Despite its age, Harmony Mission Dam continues to play a crucial role in water management and recreation activities in Bates County, Missouri.

As a significant feature in the Tulsa District, Harmony Mission Dam contributes to the overall water resource infrastructure of the region. With its uncontrolled spillway and satisfactory condition assessment, this dam serves as a testament to effective water management practices and the importance of maintaining and monitoring such critical structures for the safety and well-being of surrounding communities and ecosystems.

Year Completed

1985

Dam Length

1781

Dam Height

42

River Or Stream

REED CREEK

Primary Dam Type

Earth

Surface Area

96

Drainage Area

1520

Nid Storage

935

Structural Height

42

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

42
       
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.