M. Schatz No.1 Reservoir Report
Nearby: Clavel No.4 M. Schatz No.2
Last Updated: December 6, 2025
M.
°F
°F
mph
Wind
%
Humidity
Summary
Schatz No.1 is a privately owned earth dam located in Ziebach, South Dakota, along the TR CHEYENNE river. Built in 1938, this dam stands at a height of 20 feet and has a storage capacity of 158 acre-feet. With a low hazard potential and a moderate risk assessment rating, this structure is regulated by the South Dakota Department of Environment and Natural Resources.
Despite its age, M. Schatz No.1 remains in good condition, with a condition assessment of "Not Rated." While it does not have an emergency action plan in place, the dam meets state regulatory requirements for permitting, inspection, and enforcement. The dam's spillway is uncontrolled, and it has a maximum discharge capacity of 840 cubic feet per second.
Managed by the St. Paul District of the US Army Corps of Engineers, M. Schatz No.1 serves as a vital water resource for the area, providing irrigation and flood control benefits to the surrounding community. As water resource and climate enthusiasts, it is important to monitor and maintain structures like M. Schatz No.1 to ensure the safety and sustainability of our water infrastructure in the face of changing environmental conditions.
Year Completed |
1938 |
Dam Length |
470 |
Dam Height |
20 |
River Or Stream |
TR CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
158 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Whitehorse Sd
|
35cfs |
Cheyenne R Near Plainview Sd
|
0cfs |
Moreau R Near Faith Sd
|
14cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
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.
M. Schatz No.1