O. Drageset Reservoir Report
Nearby: A. Drageset No.4 O. Drageset No.2
Last Updated: December 10, 2025
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Summary
Drageset, located in Ziebach, South Dakota, is a privately owned earth dam that was completed in 1955. With a height of 14 feet and a length of 540 feet, this dam on the TR MOREAU river has a storage capacity of 123 acre-feet and a maximum discharge of 4200 cubic feet per second. Despite being classified as low hazard potential and not currently rated for condition assessment, O. Drageset is regulated by the South Dakota Department of Environment and Natural Resources (DENR), with state permitting, inspection, and enforcement in place.
Managed by the Natural Resources Conservation Service, O. Drageset serves as a vital infrastructure for water resource management in the area. Although the dam does not have associated structures or locks, it plays a crucial role in flood control and water storage for the surrounding community. Given its location in a relatively remote area and the lack of recent inspection data, the dam's emergency preparedness and risk assessment status remain unspecified, raising questions about its current safety standards.
As a key component of the water management system in South Dakota, O. Drageset underscores the importance of maintaining and monitoring aging infrastructure for climate resilience and disaster preparedness. With potential impacts on downstream communities and ecosystems, it is essential for regulators, owners, and stakeholders to prioritize the assessment and maintenance of dams like O. Drageset to ensure their long-term safety and functionality in the face of changing environmental conditions.
Year Completed |
1955 |
Dam Length |
540 |
Dam Height |
14 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Nid Storage |
123 |
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.
O. Drageset