Sd Noname 90 Reservoir Report
Nearby: Sd Noname 91 Sd Noname 92
Last Updated: December 5, 2025
Sd Noname 90 is a privately owned dam located in Haakon, South Dakota, with a low hazard potential.
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Summary
Built in 1955, this earth dam stands at 16 feet in height and spans 560 feet in length, providing a storage capacity of 320 acre-feet. Despite not being rated for condition assessment, the dam is regulated by the South Dakota Department of Agriculture and Natural Resources, ensuring that it is regularly inspected, permitted, and enforced for safety and compliance.
Situated on the Bad River Offstream, Sd Noname 90 is overseen by the St. Paul District of the US Army Corps of Engineers. Although it has not undergone recent modifications or risk assessments, the dam remains a crucial structure for water resource management in the region. With a maximum discharge capacity of 630 cubic feet per second, the dam plays a vital role in flood control and water supply for the surrounding area.
Managed by private owners, Sd Noname 90 serves as a key infrastructure for water management in Haakon County. While its exact purposes and primary function are unspecified, the dam's presence and regulated status highlight its significance in maintaining water quality, supply, and safety in the region. Enthusiasts of water resources and climate resilience will find interest in the history and operational details of this essential earth dam.
Year Completed |
1955 |
Dam Length |
560 |
Dam Height |
16 |
River Or Stream |
BADRIVEROFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
320 |
Hazard Potential |
Low |
Nid Height |
16 |
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.
Sd Noname 90