Brost Number 6 Reservoir Report
Nearby: Brost Number 7 Brost Number 8
Last Updated: December 8, 2025
Brost Number 6, located in Jones, South Dakota, is a privately owned earth dam completed in 1963 with a height of 28 feet and a storage capacity of 22 acre-feet.
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Summary
This dam on the TR-WHITERIVER is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and is inspected, permitted, and enforced by state agencies. Despite being classified as having a low hazard potential, the condition of Brost Number 6 is currently not rated, and there is no Emergency Action Plan (EAP) in place.
Managed by the Natural Resources Conservation Service, Brost Number 6 serves primarily for water resource management purposes. With a normal storage capacity of 15 acre-feet and a maximum discharge rate of 337 cubic feet per second, this dam plays a vital role in regulating water flow in the area. Although not extensively modified or equipped with features like spillways or locks, Brost Number 6 remains a key structure in the St. Paul District, contributing to the overall water management strategy in the region.
For water resource and climate enthusiasts, Brost Number 6 presents an intriguing case study of a privately owned earth dam in South Dakota. As efforts continue to assess its condition and potential risks, there is a need for further evaluation and potentially the development of an Emergency Action Plan to ensure the safety and effectiveness of this important water management structure.
Year Completed |
1963 |
Dam Length |
243 |
Dam Height |
28 |
River Or Stream |
TR-WHITERIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
22 |
Hazard Potential |
Low |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Brost Number 6