Sd Noname 240 Reservoir Report
Nearby: Sd Noname 200 Blair #3
Last Updated: December 5, 2025
Sd Noname 240 is a privately owned dam located in Haakon, South Dakota, along the TR-Cheyenne River.
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Summary
Built in 1946, this earth dam stands at a height of 19 feet and has a length of 500 feet, providing a storage capacity of 105 acre-feet. Despite its low hazard potential, the dam is regulated and inspected by the South Dakota Department of Environment and Natural Resources (DENR) to ensure its safety and compliance with state regulations.
The dam's primary purpose and specific design features are not specified in the data, but it is noted that the structure is in fair condition and has not been rated for its current condition. The dam's emergency action plan (EAP) status, risk assessment, and management measures are also not documented. Although the dam does not fall under the jurisdiction of the U.S. Army Corps of Engineers (USACE), its location and ownership make it a significant part of the local water resource infrastructure in the region.
Overall, Sd Noname 240 serves as a key component of water management along the Cheyenne River, providing storage and control of water flow for various purposes in Haakon County. While it may not have a high hazard potential, the dam's importance in the local water resource system highlights the need for continued monitoring and maintenance to ensure its long-term functionality and safety for both the surrounding community and the environment.
Year Completed |
1946 |
Dam Length |
500 |
Dam Height |
19 |
River Or Stream |
TR- CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
105 |
Hazard Potential |
Low |
Nid Height |
19 |
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 240