Brost Number 1 Reservoir Report
Nearby: Dykstra Nulmber 11 Hix Number 1
Last Updated: December 13, 2025
Brost Number 1 is a significant Earth dam located in Jones, South Dakota, along the TR-WHITE RIVER.
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Summary
Constructed in 1959, this private dam stands at a height of 32 feet with a hydraulic height of 28 feet and a length of 500 feet. It has a storage capacity of 200 acre-feet, with a normal storage level of 130 acre-feet, and a maximum discharge of 1222 cubic feet per second. Despite its age, the dam's condition assessment is currently listed as "Not Rated" with a significant hazard potential.
Managed by the Natural Resources Conservation Service, Brost Number 1 is subject to state regulation, inspection, and enforcement. While the last inspection date was in 1981, the dam's emergency action plan and risk assessment information are not readily available. With its location in a high-risk area, it is crucial that proper measures are in place to ensure the safety and stability of this water resource infrastructure. For water resource and climate enthusiasts, Brost Number 1 presents an opportunity to explore the intersection of infrastructure management, environmental regulations, and emergency preparedness in the face of changing climate conditions.
Year Completed |
1959 |
Dam Length |
500 |
Dam Height |
32 |
River Or Stream |
TR-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Drainage Area |
3 |
Nid Storage |
200 |
Hazard Potential |
Significant |
Nid Height |
32 |
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 1