Hideout Lake Dam Reservoir Report

Last Updated: December 9, 2025

Located in Herculaneum, Missouri, the Hideout Lake Dam is a private-owned structure primarily used for recreation purposes.


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Summary

Built in 1945, this earth dam stands at a height of 33 feet and has a storage capacity of 141 acre-feet. With a hazard potential rated as high, the dam has not been inspected since November 1980 and is currently listed as not rated in terms of its condition assessment.

The Hideout Lake Dam poses a potential risk due to its outdated inspection records and lack of a current condition assessment. Despite its high hazard potential, the dam continues to be utilized for recreational activities, serving as a popular spot for water enthusiasts in the Jefferson County area. With no state regulation or inspection in place, there is a growing concern over the safety and maintenance of this vital water resource in the region.

As water resource and climate enthusiasts continue to monitor the condition of Hideout Lake Dam, efforts are needed to ensure proper inspection and maintenance protocols are established to mitigate any potential risks associated with the structure. With its location near the TR to Sandy Creek river/stream, the dam plays a crucial role in providing water storage and recreational opportunities for the local community. It is imperative that steps are taken to address the dam's high hazard potential and ensure the safety of the surrounding area and residents who rely on this water source.

Year Completed

1945

Dam Height

33

River Or Stream

TR TO SANDY CREEK

Primary Dam Type

Earth

Surface Area

8

Drainage Area

120

Nid Storage

141

Structural Height

33

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

33
       
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.