Sd Noname 200 Reservoir Report
Nearby: Sd Noname 240 Hanson Dam
Last Updated: December 6, 2025
Sd Noname 200, a privately owned structure located in Haakon, South Dakota, is a dam on the Cheyenne River with a height of 30 feet and a length of 400 feet.
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Summary
Completed in 1953, this earth dam has a storage capacity of 120 acre-feet and a maximum discharge of 600 cubic feet per second. Despite being classified as low hazard potential, the dam's condition is currently not rated, and it has not undergone recent inspections or assessments.
Managed by the South Dakota Department of Environment and Natural Resources, Sd Noname 200 is subject to state regulation, permitting, inspection, and enforcement. While the dam's purpose and associated structures are unspecified, its primary owner is listed as a private entity. The dam's location, near the Cheyenne River in a remote area with no designated city, further emphasizes its rural and natural setting.
With no emergency action plan in place and limited information on risk assessment and management measures, Sd Noname 200 presents a potential area for further study and proactive monitoring by water resource and climate enthusiasts. As one of the many dams under state jurisdiction in South Dakota, this structure serves as a reminder of the importance of maintaining and assessing the safety of water infrastructure in vulnerable and ecologically significant areas.
Year Completed |
1953 |
Dam Length |
400 |
Dam Height |
30 |
River Or Stream |
TR CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Nid Storage |
120 |
Hazard Potential |
Low |
Nid Height |
30 |
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 200