Brost Number 5 Reservoir Report
Nearby: Brost Number 4 Dalhke Ranch Number 1
Last Updated: December 11, 2025
Brost Number 5 is a privately owned dam located in Jones, South Dakota, along the TR-WHITERIVER.
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Summary
Constructed in 1963 by the Natural Resources Conservation Service, this earth-type dam stands at 27 feet high and spans 414 feet in length. With a storage capacity of 31 acre-feet, it serves the primary purpose of water resource management and flood control in the region.
Managed by the South Dakota Department of Environment and Natural Resources, Brost Number 5 is regulated, inspected, and enforced to ensure optimal functionality and safety. Despite being rated as low hazard potential and not yet conditionally assessed, this dam plays a crucial role in mitigating potential risks and supporting the local ecosystem. With a maximum discharge capacity of 937 cubic feet per second, it remains a vital infrastructure for water conservation in the area.
For water resource and climate enthusiasts, Brost Number 5 serves as a significant landmark in South Dakota, showcasing the importance of sustainable water management practices. As part of the St. Paul District, this dam represents a collaborative effort between private owners and state agencies to safeguard the surrounding communities from potential water-related hazards. Its historical significance and ongoing regulatory oversight highlight the critical role of dams in maintaining ecological balance and supporting resilient water systems in the face of changing climate conditions.
Year Completed |
1963 |
Dam Length |
414 |
Dam Height |
27 |
River Or Stream |
TR-WHITERIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
31 |
Hazard Potential |
Low |
Nid Height |
27 |
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 5