Summary
This earth dam stands at a height of 26 feet and has a storage capacity of 20 acre-feet, with a maximum discharge rate of 1500 cubic feet per second. The dam, managed by a private owner, is regulated by the South Dakota Department of Environment and Natural Resources, ensuring its safety and compliance with state regulations.
Despite its low hazard potential, Koster Dam plays a vital role in managing water flow and storage in the area, particularly for the tributaries of the Missouri River. With a normal storage capacity of 16 acre-feet, the dam helps mitigate flooding and ensures a stable water supply for agricultural and industrial needs. The dam's condition is currently rated as "Not Rated," indicating a need for further assessment and potentially maintenance or upgrades to ensure its long-term viability.
In the event of an emergency, the dam's emergency action plan (EAP) status is unknown, highlighting the importance of regular inspections and preparedness measures. With its strategic location and contribution to water management in the region, Koster Dam remains a key infrastructure asset for water resource and climate enthusiasts to monitor and support for sustainable water management practices.
Year Completed |
1971 |
Dam Length |
550 |
Dam Height |
26 |
River Or Stream |
TRIB-MISSONot RatedI |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
20 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Oak Cr Near Wakpala Sd
|
10cfs |
Grand R At Little Eagle Sd
|
47cfs |
Moreau R Near Whitehorse Sd
|
35cfs |
Beaver Creek Bl Linton
|
39cfs |
Foot Creek Near Aberdeen
|
0cfs |
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.
Koster Dam