Lembeck Lake Dam Reservoir Report

Last Updated: December 6, 2025

Lembeck Lake Dam, located in Jefferson County, Missouri, serves as a vital water resource and recreational area for the local community.


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Summary

Built in 1958, this private-owned Earth dam stands at a height of 26 feet and has a storage capacity of 348 acre-feet. With a primary purpose of recreation, the dam provides a picturesque setting for outdoor activities such as fishing, boating, and birdwatching.

Despite its importance as a recreational spot, Lembeck Lake Dam is classified as having a high hazard potential due to its condition assessment being marked as "Not Rated". The last inspection of the dam was conducted in 1981, emphasizing the need for regular maintenance and assessment to ensure the safety and stability of the structure. Additionally, the dam does not fall under state jurisdiction, highlighting the importance of private owners taking responsibility for the upkeep and management of such critical infrastructure.

As a water resource and climate enthusiast, Lembeck Lake Dam presents a fascinating case study in the intersection of human interaction with natural landscapes. With its location on Whitehead Creek and a drainage area of 2200 square miles, the dam plays a crucial role in managing water flow and providing recreational opportunities. As we continue to face challenges posed by climate change, it is essential to monitor and maintain dams like Lembeck Lake to ensure their resilience and longevity in the face of evolving environmental conditions.

Year Completed

1958

Dam Height

26

River Or Stream

WHITEHEAD CREEK

Primary Dam Type

Earth

Surface Area

25

Drainage Area

2200

Nid Storage

348

Structural Height

26

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

26
       
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.