Moench Dam Reservoir Report
Nearby: Lake Hanson Ethan
Last Updated: December 13, 2025
Moench Dam, located in Hanson, South Dakota, is a privately owned structure designed by Ducks Unlimited and completed in 2003.
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Summary
This Earth-type dam stands at a height of 11 feet and spans 444 feet along TR Bloom Creek. With a storage capacity of 310 acre-feet, the dam serves the primary purpose of water resource management in the area, with a low hazard potential and a moderate risk assessment rating.
The dam features an uncontrolled spillway with a width of 230 feet and has not been rated for its condition assessment as of the last inspection in May 2004. Despite not having any outlet gates, Moench Dam plays a vital role in regulating water flow and providing flood protection to the surrounding area. Its location and design are essential for maintaining the ecological balance of the region and ensuring sustainable water resource management practices.
Water resource and climate enthusiasts can appreciate the significance of Moench Dam in contributing to the overall resilience of the local ecosystem and water supply. With its state-regulated status and adherence to inspection, permitting, and enforcement protocols, the dam exemplifies a commitment to effective water infrastructure management in South Dakota. As a pivotal structure designed to mitigate flood risks and support water storage needs, Moench Dam stands as a testament to the importance of sustainable water resource practices in the face of changing climate conditions.
Year Completed |
2003 |
Dam Length |
444 |
Dam Height |
11 |
River Or Stream |
TR BLOOM CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
11 |
Drainage Area |
8 |
Nid Storage |
310 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
11 |
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.
Moench Dam