K. Dorsey No.1 Reservoir Report
Nearby: K. Dorsey No.2 Robert Meyer No.3
Last Updated: December 7, 2025
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Summary
Dorsey No.1 is a privately owned earth dam located in Ziebach, South Dakota, along the TR MOREAU river. Built in 1966 by the Natural Resources Conservation Service, this dam stands at 22 feet high and stretches 700 feet long, with a storage capacity of 196 acre-feet. Despite being regulated and permitted by the state of South Dakota, the dam is currently rated as "Not Rated" in terms of its condition assessment.
With a low hazard potential, K. Dorsey No.1 plays a crucial role in water resource management in the area by providing flood control and storing water for various purposes. While the dam has not been inspected recently, it is equipped with state-of-the-art facilities for inspection, enforcement, and emergency preparedness. This dam serves as a valuable asset in ensuring water security and climate resilience in the region, especially under the supervision of the DENR and the St. Paul District of the USACE.
As a key water infrastructure in South Dakota, K. Dorsey No.1 not only contributes to the local economy but also plays a vital role in maintaining the ecological balance of the surrounding environment. With its strategic location and design, this dam stands as a testament to the importance of sustainable water management practices in the face of changing climate conditions. Water resource and climate enthusiasts can appreciate the significance of K. Dorsey No.1 in safeguarding water resources for future generations.
Year Completed |
1966 |
Dam Length |
700 |
Dam Height |
22 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
196 |
Hazard Potential |
Low |
Nid Height |
22 |
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.
K. Dorsey No.1