Zorc Bros. No.3 Reservoir Report
Nearby: Zorc Bros. No.2 M. Schatz No.1
Last Updated: December 13, 2025
Zorc Bros.
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Summary
No.3 is a privately owned dam located in Ziebach, South Dakota, along the TR CHEYENNE river. Built in 1950, this earth dam stands at a height of 17 feet and has a storage capacity of 228 acre-feet. With a low hazard potential and a "Not Rated" condition assessment, this dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR).
Managed by the Natural Resources Conservation Service, Zorc Bros. No.3 plays a crucial role in water resource management and flood control in the region. With a maximum discharge capacity of 1525 cubic feet per second, this dam helps in regulating water flow and providing irrigation water for agricultural purposes in the area. Despite not having an Emergency Action Plan (EAP) in place, the dam is inspected, permitted, and enforced by the state regulatory agency.
As a key infrastructure in the St. Paul District of South Dakota, Zorc Bros. No.3 serves as a vital component in the local water resource system. While the dam's condition assessment is currently not rated, ongoing inspections and regulatory oversight help to ensure its continued safe operation and contribution to water management efforts in the region.
Year Completed |
1950 |
Dam Length |
880 |
Dam Height |
17 |
River Or Stream |
TR CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
17 |
Nid Storage |
228 |
Hazard Potential |
Low |
Nid Height |
17 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Whitehorse Sd
|
35cfs |
Cheyenne R Near Plainview Sd
|
0cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
Moreau R Near Faith Sd
|
14cfs |
Grand R At Little Eagle Sd
|
47cfs |
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.
Zorc Bros. No.3