Pinson Gravel Company Dam Reservoir Report

Last Updated: December 7, 2025

Pinson Gravel Company Dam, located in Cruise Mill, Missouri, is a privately owned structure that serves the primary purpose of storing tailings.


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Summary

Completed in 1973, this dam stands at a height of 79 feet and has a length of 3234 feet. With a storage capacity of 875 acre-feet and a drainage area of 631 square miles, the dam plays a crucial role in managing water resources in the area.

The dam, which is regulated by the DAM AND RESERVOIR SAFETY PROG in Missouri, has a high hazard potential but is currently assessed to be in satisfactory condition. It features an uncontrolled spillway with a width of 90 feet and has no outlet gates. The latest inspection in March 2018 deemed the structure to be in good standing, with a moderate risk assessment rating of 3. While no emergency action plan or inundation maps have been prepared, the dam is subject to regular state inspections and enforcement measures to ensure public safety and environmental protection.

Overall, Pinson Gravel Company Dam plays a vital role in water management and conservation efforts in Washington County, Missouri. With its solid design and satisfactory condition, the dam continues to serve its intended purpose effectively while being subject to rigorous state regulations and inspections. This structure stands as a testament to the importance of responsible dam operation and maintenance in safeguarding water resources and mitigating risks associated with potential emergencies.

Year Completed

1973

Dam Length

3234

Dam Height

79

River Or Stream

TR-OLD MINES CR

Surface Area

3

Drainage Area

631

Nid Storage

875

Structural Height

79

Outlet Gates

None

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

79
       
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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.