Sd Noname 256 Reservoir Report
Nearby: Hansen Dam Sd Noname 260
Last Updated: December 5, 2025
Sd Noname 256 is a private dam located in Haakon, South Dakota, along the TR-Cheyenne River.
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Summary
Built in 1952, this earth dam stands at a height of 21 feet and has a storage capacity of 80 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and is inspected, permitted, and enforced by state authorities.
Despite its low hazard potential and current "Not Rated" condition assessment, Sd Noname 256 plays a crucial role in water resource management in the area. With a maximum discharge capacity of 1800 cubic feet per second, the dam helps control flooding and provides irrigation water for agricultural purposes. The Natural Resources Conservation Service was involved in the design of the dam, highlighting the collaborative efforts between state and federal agencies in ensuring the safety and functionality of this essential infrastructure.
As a key structure along the TR-Cheyenne River, Sd Noname 256 serves as a testament to the importance of proper water resource management in mitigating the impacts of climate change. With state-of-the-art inspection and enforcement protocols in place, the dam continues to play a vital role in safeguarding communities and ecosystems in the region.
Year Completed |
1952 |
Dam Length |
150 |
Dam Height |
21 |
River Or Stream |
TR-CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
80 |
Hazard Potential |
Low |
Nid Height |
21 |
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 256