Mononame 683 Reservoir Report

Last Updated: December 6, 2025

Mononame 683 is a privately owned earth dam located in Cass County, Missouri, specifically in the city of Raymore.


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Summary

Built in 1958, this dam on TR East Creek serves a dual purpose of water supply and other functions. With a height of 10 feet and a storage capacity of 64 acre-feet, this low hazard potential structure covers an area of 12 acres and drains a watershed of 2,116 acres.

Despite being privately owned and not regulated by the state, Mononame 683 remains an important component of the local water resource infrastructure. Its condition is currently not rated, and there is no emergency action plan in place. The dam has not been modified in recent years, and it lacks certain features such as spillways and outlet gates. Despite these limitations, the dam continues to provide valuable water storage and supply benefits to the surrounding community.

For water resource and climate enthusiasts, Mononame 683 serves as a prime example of a privately owned dam playing a crucial role in water management. Its construction in the late 1950s reflects the historical importance of such structures in meeting the water supply needs of growing communities. As the owner and operator, continued monitoring and maintenance of Mononame 683 will be essential to ensure its long-term functionality and contribution to sustainable water resource management in the region.

Year Completed

1958

Dam Height

10

River Or Stream

TR EAST CREEK

Primary Dam Type

Earth

Surface Area

12

Drainage Area

2116

Nid Storage

64

Structural Height

10

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

10
       
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.