A. Drageset No.4 Reservoir Report
Nearby: O. Drageset O. Drageset No.2
Last Updated: December 12, 2025
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Summary
Drageset No.4 is a privately owned earth dam located in Ziebach County, South Dakota, along the TR MOREAU river. Completed in 1946, this dam stands at a height of 14 feet and has a storage capacity of 92 acre-feet. With a maximum discharge of 4620 cubic feet per second, it serves as a crucial water resource infrastructure in the region.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), A. Drageset No.4 is regulated, permitted, inspected, and enforced by the state authorities to ensure its safety and functionality. Despite being rated as having a low hazard potential and not being conditionally assessed, the dam is an essential component of the local water management system, providing flood control, irrigation, and water supply benefits to the surrounding area.
As a part of the St. Paul District of the US Army Corps of Engineers, A. Drageset No.4 plays a vital role in water resource management in South Dakota. With its historical significance dating back to the mid-20th century, this dam continues to serve the community while adhering to state regulations and safety standards to mitigate any potential risks associated with its operation.
Year Completed |
1946 |
Dam Length |
520 |
Dam Height |
14 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Nid Storage |
92 |
Hazard Potential |
Low |
Nid Height |
14 |
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.
A. Drageset No.4