Donze Lake Dam Reservoir Report

Last Updated: December 6, 2025

Donze Lake Dam, located in St.


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Summary

Marys, Missouri, is a privately owned structure primarily used for recreation purposes. Completed in 1969, this earth dam stands at a structural height of 32 feet and has a storage capacity of 479 acre-feet. The dam is situated on the TR-SALINE CR river, within the St. Louis District of Missouri, making it a popular spot for water resource and climate enthusiasts to explore.

Although the dam has a high hazard potential, its condition assessment is currently listed as "Not Rated." Despite this, the dam has not been regulated or inspected by state agencies. The dam's emergency action plan status, risk assessment, and management measures are also not updated or in compliance with guidelines. Despite these challenges, the Donze Lake Dam remains an intriguing site for those interested in water resource management and the impact of climate on dam infrastructure.

As a hub for recreational activities, the Donze Lake Dam offers a unique opportunity for visitors to appreciate the intersection of human-made structures with natural water bodies. Its unregulated status and lack of recent inspections raise questions about its long-term sustainability and the potential risks it may pose. For water resource and climate enthusiasts, Donze Lake Dam presents an interesting case study in the management and maintenance of private dams in the Missouri region.

Year Completed

1969

Dam Height

32

River Or Stream

TR-SALINE CR

Primary Dam Type

Earth

Surface Area

28

Drainage Area

745

Nid Storage

479

Structural Height

32

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

32
       
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.