Matter Reservoir Report
Nearby: Tribe No.11 Hulm
Last Updated: December 7, 2025
Matter is a private dam located in Ziebach, South Dakota, along the Moreau River.
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Summary
Built in 1938, this Earth-type dam stands at a height of 18 feet and has a length of 590 feet. With a storage capacity of 335 acre-feet and a maximum discharge of 1600 cubic feet per second, Matter serves as an important water resource for the surrounding area. Despite being classified as having a low hazard potential, the dam's condition is currently not rated, highlighting the need for continued monitoring and maintenance.
Owned and regulated by the South Dakota Department of Environment and Natural Resources (DENR), Matter plays a crucial role in water management for the region. While the dam is state-jurisdictional and permitted for operation, its inspection and enforcement are also overseen by the state agency. With its primary purpose not specified, Matter's presence on the Moreau River contributes to flood control, irrigation, and water supply for local communities.
As climate change continues to impact water resources and weather patterns, the importance of well-maintained infrastructure like Matter cannot be overstated. With its storage capacity and discharge capabilities, this dam remains a key asset in managing water flows and mitigating potential risks. As efforts to address climate-related challenges evolve, the role of structures like Matter in ensuring water security and resilience will only become more crucial.
Year Completed |
1938 |
Dam Length |
590 |
Dam Height |
18 |
River Or Stream |
MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
335 |
Hazard Potential |
Low |
Nid Height |
18 |
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.
Matter