Stockton Dam Reservoir Report

Last Updated: December 24, 2025

Stockton Dam, located in Caplinger Mills, Missouri, is a rockfill dam completed in 1969 by the US Army Corps of Engineers.


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Summary

With a primary purpose of flood risk reduction, the dam also serves various other functions such as fish and wildlife pond, hydroelectric power generation, irrigation, navigation, recreation, and water supply. Spanning over the Sac River, the dam stands at a hydraulic height of 153 feet and a structural height of 161 feet, with a dam length of 6100 feet and a storage capacity of 1,674,000 acre-feet.

The dam has a controlled spillway and a hazard potential rated as high, with continuous monitoring and risk management measures in place to address any potential issues. The US Army Corps of Engineers actively manages dam-related flood risks by conducting regular inspections, prioritizing maintenance activities, and collaborating with local emergency managers to enhance emergency preparedness and response efforts. Despite its crucial role in flood risk reduction, the dam's limited storage capacity can lead to water releases to manage water levels or relieve pressure to maintain structural integrity, especially during severe weather events.

Inundation maps and an emergency action plan have been prepared for Stockton Dam, ensuring that necessary steps are in place to mitigate risks and respond effectively to any dam-related emergencies. As part of ongoing risk management efforts, the dam's condition and health are closely monitored, and necessary maintenance and repairs are promptly carried out to uphold its functionality.Overall, Stockton Dam plays a vital role in protecting the surrounding area from flooding, showcasing the importance of effective dam management and risk mitigation strategies in safeguarding water resources and communities against potential hazards.

Year Completed

1969

Dam Length

6100

River Or Stream

SAC RIVER

Primary Dam Type

Rockfill

Surface Area

24900

Hydraulic Height

153

Drainage Area

1160

Nid Storage

1674000

Structural Height

161

Hazard Potential

High

Nid Height

161
       
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.