Dyer Lake Dam Reservoir Report

Last Updated: December 12, 2025

Dyer Lake Dam, located in Lafayette County, Missouri, was completed in 1965 and serves as a vital resource for fish and wildlife in the area.


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Summary

The primary purpose of this earth dam is to provide a habitat for various species, as well as support fire protection, grade stabilization, and recreational activities. With a height of 25 feet and a length of 450 feet, this dam has a normal storage capacity of 33 acre-feet, covering a surface area of 5 acres.

Despite being privately owned and not regulated by the state, Dyer Lake Dam has a low hazard potential and a moderate risk assessment rating. The dam is primarily constructed of earth and stone, with a soil foundation, and features an uncontrolled spillway. While it currently holds a "Not Rated" condition assessment, the dam is continuously monitored for any potential risks and hazards. Although it lacks an Emergency Action Plan and inundation maps, the dam still plays a crucial role in the local ecosystem and water resource management.

Situated along TR-North Blackjack Creek, Dyer Lake Dam provides essential support for the surrounding wildlife and contributes to the overall conservation efforts in the area. With its strategic location and design, it not only fulfills its primary purpose of creating a fish and wildlife pond but also supports various other functions, making it a valuable asset for the community. Despite being privately owned, the dam's impact on the environment and water resources underscores the importance of proper maintenance and monitoring to ensure its long-term sustainability and safety.

Year Completed

1965

Dam Length

450

Dam Height

25

River Or Stream

TR-NORTH BLACKJACK CREEK

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

24

Drainage Area

51.2

Nid Storage

33

Structural Height

26

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

26
       
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.