Sd Noname 273 Reservoir Report
Nearby: Sd Noname 272 Sd Noname 270
Last Updated: December 6, 2025
Sd Noname 273 is a privately owned dam located in Haakon, South Dakota, along the Cheyenne River.
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Summary
Built in 1952, this earth dam stands at 18 feet tall and stretches 500 feet in length, with a storage capacity of 70 acre-feet. Despite its age, the dam is deemed to have a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment.
The South Dakota Department of Environment and Natural Resources regulates Sd Noname 273, ensuring that it meets state permitting, inspection, and enforcement requirements. While the dam has not been modified in recent years and lacks specific data on certain aspects such as spillway type and width, it continues to serve its primary purpose effectively. With a maximum discharge capacity of 600 cubic feet per second, the dam plays a vital role in water management and flood control efforts in the region.
Although Sd Noname 273 may not be a well-known structure, its presence on the Cheyenne River highlights the importance of maintaining and monitoring dams for water resource and climate enthusiasts. With its historical significance and continued functionality, this dam serves as a testament to the vital role that infrastructure plays in ensuring water security and environmental resilience in South Dakota.
Year Completed |
1952 |
Dam Length |
500 |
Dam Height |
18 |
River Or Stream |
TR-CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
70 |
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 273