Sd Noname 255 Reservoir Report
Nearby: Sd Noname 262 Sd Noname 254
Last Updated: December 5, 2025
Sd Noname 255 is a privately owned dam located in Haakon, South Dakota, along the TR-Cheyenne River offstream.
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Summary
Built in 1956, this earth-type dam stands at 18 feet tall and stretches 75 feet in length, with a storage capacity of 60 acre-feet. Managed by the Natural Resources Conservation Service, the dam is regulated by the South Dakota Department of Environment and Natural Resources, ensuring state permitting, inspection, and enforcement.
Despite its low hazard potential and current "Not Rated" condition assessment, Sd Noname 255 plays a crucial role in water resource management in the region. With a maximum discharge capacity of 600 cubic feet per second, the dam provides flood control and water storage benefits for the surrounding area. While specific purposes and associated structures are not indicated, the dam's presence signifies the importance of infrastructure in mitigating climate-related risks and enhancing water security in South Dakota.
As water resource and climate enthusiasts continue to explore the role of dams in sustainable development, Sd Noname 255 serves as a case study in state-regulated infrastructure. With a focus on safety and regulatory compliance, this dam exemplifies the collaborative efforts between private owners, federal agencies, and state authorities in ensuring effective water management and environmental protection in South Dakota.
Year Completed |
1956 |
Dam Length |
75 |
Dam Height |
18 |
River Or Stream |
TR-CHEYENNE RIVER OFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
60 |
Hazard Potential |
Low |
Nid Height |
18 |
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 255