Hutchinson Irr. Dam Reservoir Report
Nearby: Hutchinson Dam Bruce Herman
Last Updated: December 13, 2025
Hutchinson Irrigation Dam, located in Lyman, South Dakota, is a privately owned earth dam completed in 1976.
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Summary
Situated on a tributary of the White River, this dam stands at a height of 30 feet and has a storage capacity of 211 acre-feet. With a low hazard potential and a condition assessment of "Not Rated," the dam plays a crucial role in regulating water flow and providing irrigation for agricultural purposes in the region.
Managed by the Natural Resources Conservation Service, Hutchinson Irrigation Dam is subject to state regulations, inspections, and enforcement. While the dam has not been rated for its condition, its emergency action plan status and risk assessment measures are currently unavailable. Despite its age, the dam continues to serve its primary purpose effectively, supporting the local community's water resource needs and contributing to the overall climate resilience of the area.
With a maximum discharge capacity of 917 cubic feet per second, Hutchinson Irrigation Dam ensures efficient water management and flood control. As a key component of the water infrastructure in South Dakota, this dam exemplifies the importance of proactive monitoring and maintenance to safeguard against potential risks and ensure the long-term sustainability of water resources in the region.
Year Completed |
1976 |
Dam Length |
462 |
Dam Height |
30 |
River Or Stream |
TRIB. WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Nid Storage |
211 |
Hazard Potential |
Low |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
White R Near Oacoma Sd
|
105cfs |
White River Near White River
|
42cfs |
Little White R Below White River Sd
|
141cfs |
Keya Paha R Near Keyapaha Sd
|
33cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
Keya Paha R At Wewela Sd
|
54cfs |
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.
Hutchinson Irr. Dam