La Belle Old City Lake Dam Reservoir Report

Last Updated: December 11, 2025

Located in Steffenville, Missouri, the La Belle Old City Lake Dam stands as a testament to engineering excellence, with its earth core and stone foundation reaching a height of 35 feet.


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Summary

Completed in 1961, this dam serves the primary purpose of recreation, offering a serene retreat for water enthusiasts. With a normal storage capacity of 109 acre-feet and a maximum discharge of 530 cubic feet per second, this dam ensures a steady water supply for the surrounding area while providing ample opportunities for leisure activities.

Managed by the local government, the La Belle Old City Lake Dam is regulated and inspected by the Dam and Reservoir Safety Program in Missouri to ensure the safety of its high hazard potential. Despite its age, the dam is deemed to be in satisfactory condition, with a moderate risk assessment rating. With a spillway width of 35 feet and outlet gates equipped with valves, this dam is equipped to handle any emergency situations that may arise. As a popular spot for water recreation and a vital water supply source, the La Belle Old City Lake Dam serves as a crucial asset for the community.

Surrounded by the picturesque Lewis County, Missouri, and nestled along Troublesome Creek, the La Belle Old City Lake Dam offers a tranquil escape for both locals and visitors alike. With a surface area of 17 acres and a drainage area of 141 square miles, this dam provides a peaceful oasis for outdoor enthusiasts. As a key component in the region's water supply infrastructure, the dam plays a vital role in sustaining the ecosystem and supporting recreational activities for generations to come.

Year Completed

1961

Dam Length

950

Dam Height

35

River Or Stream

TR TROUBLESOME CREEK

Primary Dam Type

Earth

Surface Area

17

Drainage Area

141

Nid Storage

339

Structural Height

35

Outlet Gates

Valve

Hazard Potential

High

Foundations

Soil

Nid Height

35
       
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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.