Brost Number 8 Reservoir Report
Nearby: Esmay And Sandy #1 Brost Number 7
Last Updated: December 8, 2025
Brost Number 8 is a privately-owned earth dam located in Jones, South Dakota, along the TR-WHITERIVER.
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Summary
Built in 1964 by the Natural Resources Conservation Service, this dam stands at 25 feet high and stretches 333 feet in length, with a storage capacity of 28 acre-feet. With a maximum discharge of 1050 cubic feet per second, this low hazard potential dam serves the primary purpose of water resource management in the area.
Despite being state-regulated and having all necessary permits, inspections, and enforcement in place, Brost Number 8 has not been rated for its condition assessment. With a low hazard potential, this dam has not been deemed to pose a significant risk to the surrounding community. Emergency preparedness measures such as an Emergency Action Plan (EAP) have not been updated, and there is no current risk assessment or management plan in place for this structure.
Located within the St. Paul District of the US Army Corps of Engineers, Brost Number 8 is overseen by the DENR in South Dakota. With its strategic location along the TR-WHITERIVER, this dam plays a crucial role in water resource management for the area. While it may not pose an immediate threat, it is important to ensure that proper maintenance and monitoring are carried out to prevent any potential risks in the future.
Year Completed |
1964 |
Dam Length |
333 |
Dam Height |
25 |
River Or Stream |
TR-WHITERIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
28 |
Hazard Potential |
Low |
Nid Height |
25 |
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 8