Dowd Dam Reservoir Report

Last Updated: December 12, 2025

Dowd Dam, located in Charles Mix, South Dakota, is a private-owned structure that plays a crucial role in water resource management in the area.


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Summary

Built in 1935, this earth dam stands at a height of 32 feet and has a storage capacity of 320 acre-feet. With a maximum discharge capability of 5000 cubic feet per second, Dowd Dam helps regulate water flow in the TR-MISSONot RatedI River, benefiting both the environment and local communities.

Managed by the South Dakota Department of Environment and Natural Resources (DENR), Dowd Dam is classified as having a low hazard potential and its condition is currently rated as "Not Rated." Despite its age, the dam continues to fulfill its primary purpose of water storage and flow control effectively. While there are no associated structures or locks, the dam's presence ensures the safety and stability of the surrounding area, showcasing the importance of proper dam maintenance and inspection protocols in safeguarding water resources and mitigating climate-related risks.

As an integral part of the St. Paul District's water infrastructure, Dowd Dam not only contributes to flood control and water supply management but also serves as a testament to the sustainable use of natural resources in the region. With its historical significance and ongoing operational efficiency, Dowd Dam stands as a symbol of responsible water resource management and climate resilience efforts in South Dakota.

Year Completed

1935

Dam Length

370

Dam Height

32

River Or Stream

TR-MISSONot RatedI RIVER

Primary Dam Type

Earth

Hydraulic Height

32

Nid Storage

320

Hazard Potential

Low

Nid Height

32
       
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.