Sd Noname 197 Reservoir Report
Nearby: Sd Noname 280 Earl Hanrahan
Last Updated: December 5, 2025
Sd Noname 197 is a privately owned dam located in Haakon, South Dakota, along the TR Cheyenne River.
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Summary
Built in 1956, this earth dam stands at a height of 15 feet and has a length of 600 feet. It serves multiple purposes, including water storage with a capacity of 198 acre-feet and a maximum discharge rate of 600 cubic feet per second. Despite being classified as having low hazard potential, the dam's condition assessment is currently listed as "Not Rated."
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Sd Noname 197 undergoes regular state inspections, permitting, and enforcement to ensure its safety and compliance with regulations. The dam is situated within the jurisdiction of the state and is regulated accordingly, with the primary source agency being the state of South Dakota. Although it lacks certain features such as spillways and outlet gates, Sd Noname 197 remains a vital structure for water resource management in the region, contributing to flood control and water supply stability along the Cheyenne River.
With its strategic location and essential role in water management, Sd Noname 197 is a significant asset for the community and the environment in Haakon County, South Dakota. The dam's design and construction reflect the engineering practices of the 1950s, ensuring reliable performance and low risk potential. As climate change impacts water resources and hydrological systems, the continued monitoring and maintenance of Sd Noname 197 will be crucial for adapting to evolving conditions and ensuring the safety and resilience of this important infrastructure in the face of future challenges.
Year Completed |
1956 |
Dam Length |
600 |
Dam Height |
15 |
River Or Stream |
TR CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
198 |
Hazard Potential |
Low |
Nid Height |
15 |
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 197