Sd Noname 271 Reservoir Report
Nearby: Sd Noname 270 Sd Noname 272
Last Updated: December 6, 2025
Sd Noname 271 is a privately owned dam located in Haakon, South Dakota, along the TR-Cheyenne River.
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Summary
Built in 1953, this earthen dam stands at a height of 15 feet and has a length of 500 feet, with a storage capacity of 78 acre-feet. It is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes regular inspections, enforcement, and permitting processes to ensure its safety and compliance with state regulations.
With a low hazard potential and a condition assessment of "Not Rated," Sd Noname 271 serves as a crucial infrastructure for water resource management in the region. Despite its age, the dam continues to play a key role in flood control and water supply management, with a maximum discharge capacity of 900 cubic feet per second. While there are no associated structures or locks, the dam's primary purpose is to provide water storage for irrigation and other agricultural needs in the area.
Managed by a private owner, Sd Noname 271 stands as a testament to the importance of maintaining and regulating dams for water resource and climate enthusiasts. Its location along the Cheyenne River in South Dakota underscores the critical role it plays in safeguarding communities from flooding events and ensuring a reliable water supply for various stakeholders. With ongoing regulatory oversight and a commitment to safety, this dam exemplifies the collaboration between private owners and state agencies in managing vital water resources.
Year Completed |
1953 |
Dam Length |
500 |
Dam Height |
15 |
River Or Stream |
TR-CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
78 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
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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 271