Lake Aggravation Dam Reservoir Report

Last Updated: December 8, 2025

Lake Aggravation Dam, located in Richwoods, Missouri, is a privately owned earth dam built in 1962 for recreational purposes.


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Summary

Standing at a height of 33 feet, the dam creates a reservoir with a storage capacity of 300 acre-feet and a normal storage level of 163 acre-feet. The dam is situated on Tyrey Creek and covers a surface area of 17 acres, serving as a popular spot for outdoor activities such as fishing and boating.

Despite its age, the dam has a high hazard potential due to its condition being rated as "Not Rated" and not having undergone a recent inspection since 1980. The dam is not regulated or inspected by the state, posing potential risks to the surrounding area in case of a failure. While the dam has no spillway and limited safety features, it remains a key recreational spot in the region. Enthusiasts interested in water resource management and climate change may find the Lake Aggravation Dam a fascinating case study of the challenges faced by aging infrastructure in the face of evolving environmental conditions.

Year Completed

1962

Dam Height

33

River Or Stream

TYREY CREEK

Primary Dam Type

Earth

Surface Area

17

Drainage Area

750

Nid Storage

300

Structural Height

33

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

33
       
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.