Hemmingson Irr. Dam Reservoir Report
Nearby: O'Connell Dam Sunshine
Last Updated: December 6, 2025
Hemmingson Irrigation Dam, located in Haakon, South Dakota, is a privately owned structure that plays a crucial role in water resource management in the region.
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Summary
Completed in 1977, this earth dam stands at a height of 22 feet and spans a length of 825 feet along the TRIB BAD RIVER. With a storage capacity of 113 acre-feet, the dam primarily serves irrigation purposes, ensuring a reliable water supply for agricultural activities in the area.
Managed by the Natural Resources Conservation Service, the Hemmingson Irrigation Dam is regulated by the South Dakota Department of Environment and Natural Resources. Despite being classified as having a low hazard potential, the dam's condition assessment is currently labeled as "Not Rated," highlighting the need for ongoing monitoring and maintenance. With a maximum discharge capacity of 675 cubic feet per second, the dam is equipped to handle potential flood events and safeguard the surrounding community from water-related risks.
For water resource and climate enthusiasts, the Hemmingson Irrigation Dam represents a key infrastructure component in South Dakota's water management system. Its presence underscores the importance of sustainable water use and effective dam maintenance practices to ensure the long-term availability of water resources for agricultural and environmental purposes in the region.
Year Completed |
1977 |
Dam Length |
825 |
Dam Height |
22 |
River Or Stream |
TRIB BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
113 |
Hazard Potential |
Low |
Nid Height |
22 |
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.
Hemmingson Irr. Dam