Bennett Robert No. 1 Reservoir Report

Last Updated: December 13, 2025

Bennett Robert No.


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Summary

1 is a privately owned dam located in Mellette, South Dakota, along a tributary of the White River. This earth dam, completed in 1963, stands at a height of 29 feet and has a storage capacity of 16 acre-feet. While the dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR), its hazard potential is classified as low, and its condition assessment is currently not rated.

Despite being a relatively small structure, Bennett Robert No. 1 plays a crucial role in water resource management in the area. With a maximum discharge capacity of 120 cubic feet per second, the dam helps regulate water flow and provides important storage for irrigation, wildlife habitat, and recreational activities. The dam is not associated with any other structures and has not undergone any modifications in recent years.

As climate change continues to impact water resources, it is essential to monitor and maintain dams like Bennett Robert No. 1 to ensure their continued safety and functionality. With proper inspection, enforcement, and emergency preparedness measures in place, this dam serves as a valuable asset in the sustainable management of water resources in the region.

Year Completed

1963

Dam Length

245

Dam Height

29

River Or Stream

TRIB. WHITE RIVER

Primary Dam Type

Earth

Hydraulic Height

29

Nid Storage

16

Hazard Potential

Low

Nid Height

29
       
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.