H&S Hill Top Lake Dam Reservoir Report

Last Updated: December 6, 2025

H&S Hill Top Lake Dam, located in St.


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Summary

Francois County, Missouri, serves multiple purposes including fire protection, stock maintenance, and recreational activities. Built in 1976, this earth and buttress dam stands at a height of 39 feet and has a length of 383 feet, providing a storage capacity of 55 acre-feet. The dam is state-regulated and inspected regularly by the DAM AND RESERVOIR SAFETY PROG to ensure its safety and satisfactory condition.

With a hazard potential rated as high, the dam poses a moderate risk and is closely monitored for any potential risks or issues. In case of emergencies, the dam has emergency action plans in place to ensure the safety of the surrounding areas. The dam's spillway type is uncontrolled with a width of 43 feet, and it has a maximum discharge capacity of 170 cubic feet per second. The dam's location along the TR-BIG RIVER makes it a crucial resource for water management and conservation in the region.

Overall, H&S Hill Top Lake Dam is a vital infrastructure for water resource management and climate-related activities in the area. Its multi-purpose design and efficient operation make it a key player in ensuring water availability for fire protection, stock maintenance, and recreational purposes. With state regulation and regular inspections, the dam stands as a reliable and safe structure for the community.

Year Completed

1976

Dam Length

383

Dam Height

39

River Or Stream

TR-BIG RIVER

Surface Area

4

Drainage Area

86

Nid Storage

55

Structural Height

37

Outlet Gates

None

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

39
       
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.