L. M. Hanson No Reservoir Report
Nearby: W. J. Asmussen L. Stephenson
Last Updated: December 13, 2025
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Summary
M. Hanson No is a privately owned dam in Hyde County, South Dakota, situated on the South Medicine Creek. Constructed in 1953, this earth dam stands at a height of 12 feet and spans a length of 535 feet, providing a maximum storage capacity of 76 acre-feet. Managed by the Natural Resources Conservation Service, the dam is regulated by the South Dakota Department of Environment and Natural Resources, with inspections and enforcement ensuring its structural integrity and safety.
With a low hazard potential and a current condition assessment of "Not Rated," L. M. Hanson No serves as a crucial water resource for the local area. The dam's primary purpose and associated structures are not specified, but its functionality in controlling flow, storage, and discharge on the South Medicine Creek is vital for water management in the region. Despite lacking detailed risk assessment and emergency action plans, the dam's relatively low hazard potential suggests it poses minimal threat to downstream areas.
Managed by private owners and with no associated federal agencies, L. M. Hanson No stands as a testament to local water resource management efforts in South Dakota. With its strategic location and design, this earth dam plays a key role in ensuring water security and stability for the community while operating within state regulatory frameworks. For water resource and climate enthusiasts, L. M. Hanson No represents a focal point for understanding the intersection of infrastructure, natural resources, and environmental stewardship in the region.
Year Completed |
1953 |
Dam Length |
535 |
Dam Height |
12 |
River Or Stream |
SOUTH MEDICINE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Nid Storage |
76 |
Hazard Potential |
Low |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bad R Near Fort Pierre Sd
|
7cfs |
White R Near Oacoma Sd
|
105cfs |
James R Near Redfield Sd
|
468cfs |
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.
L. M. Hanson No