Brost Number 1 Reservoir Report

Last Updated: April 29, 2026

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Brost Number 1 is a privately owned dam in South Dakota, located on the TR-WHITERIVER.


Summary

Built in 1953, this earth dam stands at 27 feet tall and stretches 450 feet in length, with a storage capacity of 22 acre-feet. While the dam is regulated and permitted by the South Dakota Department of Environment and Natural Resources, it has not been rated for its condition assessment and is considered to have a low hazard potential.

Managed by the Natural Resources Conservation Service, Brost Number 1 plays a crucial role in controlling the flow of water and protecting the surrounding area from potential flooding. Despite its age, the dam continues to serve its purpose effectively, with a maximum discharge capacity of 600 cubic feet per second. With its strategic location and design, Brost Number 1 stands as a testament to the importance of water resource management and climate resilience in the face of changing environmental conditions.

15-Day Long Term Forecast


Year Completed

1953

Dam Length

450

Dam Height

27

River Or Stream

TR-WHITERIVER

Primary Dam Type

Earth

Hydraulic Height

27

Nid Storage

22

Hazard Potential

Low

Nid Height

27
       
Seasonal Comparison

5-Day Hourly Forecast Detail

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.
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