Sd Noname 203 Reservoir Report
Nearby: Sd Noname 277 Sd Noname 199
Last Updated: December 5, 2025
Sd Noname 203 is a privately owned dam located in Haakon, South Dakota, along the Cheyenne River.
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Summary
Built in 1955, this earth dam stands at a height of 15 feet and stretches 500 feet in length, with a storage capacity of 60 acre-feet. Despite its age, the dam is considered to have a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Sd Noname 203 is subject to state regulations, permitting, inspection, and enforcement. While the dam has not been modified in recent years, it is equipped with outlet gates and a maximum discharge capacity of 600 cubic feet per second. The dam's emergency action plan (EAP) status, risk assessment, and management measures are currently not available, highlighting potential areas for improvement in terms of preparedness and response.
For water resource and climate enthusiasts, Sd Noname 203 presents an intriguing case study of a mid-century dam in the heart of South Dakota. As an essential structure for water management and flood control along the Cheyenne River, the dam's historical significance and current regulatory oversight offer valuable insights into the intersection of infrastructure, environmental stewardship, and emergency response planning. With its low hazard potential and unassessed condition, there is an opportunity for stakeholders to collaborate on enhancing the safety and resilience of Sd Noname 203 in the face of evolving climate challenges.
Year Completed |
1955 |
Dam Length |
500 |
Dam Height |
15 |
River Or Stream |
TR CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
60 |
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 203