M. Aspach Reservoir Report
Nearby: Robert Meyer No.3 Donald King 3
Last Updated: December 9, 2025
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Summary
Aspach, located in Ziebach, South Dakota, is a privately-owned earth dam completed in 1959 along the TR MOREAU river. With a height of 27 feet and a length of 475 feet, this dam has a storage capacity of 121 acre-feet and a maximum discharge of 3000 cubic feet per second. Managed by the Natural Resources Conservation Service, M. Aspach is regulated by the South Dakota Department of Environment and Natural Resources, with state permitting, inspection, and enforcement in place to ensure its safety and compliance.
Despite being classified as low hazard potential and not yet rated for condition assessment, M. Aspach serves a crucial role in water resource management in the area. It provides irrigation water and helps regulate the flow of the TR MOREAU river, contributing to agricultural activities and environmental preservation. With its solid construction and state jurisdiction oversight, M. Aspach stands as a testament to effective dam management practices in South Dakota, ensuring its continued functionality and safety for the community.
As an essential piece of infrastructure in the region, M. Aspach plays a vital role in water resource management and climate resilience efforts. With its capacity to store water and control downstream flow, this dam not only supports local agriculture but also helps mitigate the impacts of droughts and floods. While its condition assessment is pending, the regulatory framework in place, including regular inspections and state enforcement, ensures that M. Aspach remains a reliable and secure structure for the community.
Year Completed |
1959 |
Dam Length |
475 |
Dam Height |
27 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
121 |
Hazard Potential |
Low |
Nid Height |
27 |
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.
M. Aspach