Sd Noname 280 Reservoir Report
Nearby: Sd Noname 197 Earl Hanrahan
Last Updated: December 5, 2025
Sd Noname 280 is a private dam located in Haakon, South Dakota, along the TR CHEYENNE river.
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Summary
Built in 1955, this Earth-type dam stands at a height of 16 feet and has a length of 700 feet, providing a storage capacity of 300 acre-feet. Despite being non-Federal, the dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR), ensuring that it meets state permitting, inspection, and enforcement requirements.
With a low hazard potential and a current condition assessment of "Not Rated," Sd Noname 280 serves as a vital water resource infrastructure in the region. The dam has a maximum discharge capacity of 2400 cubic feet per second, making it crucial for flood control and water management in the area. Although the dam's Emergency Action Plan (EAP) status and risk assessment details are not specified, it is clear that the structure plays a significant role in maintaining water security and climate resilience in South Dakota.
Overall, Sd Noname 280 stands as a testament to the importance of private water infrastructure in supporting local communities and ecosystems. As climate change continues to impact water resources, the proper maintenance and regulation of dams like Sd Noname 280 are essential for ensuring water security and mitigating risks associated with extreme weather events. With its history dating back to the 1950s, this Earth-type dam remains a critical asset for water management in Haakon County and beyond.
Year Completed |
1955 |
Dam Length |
700 |
Dam Height |
16 |
River Or Stream |
TR CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
300 |
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 280