Sd Noname 221 Reservoir Report
Nearby: Sd Noname 210 Sd Noname 194
Last Updated: February 13, 2026
Sd Noname 221 is a privately owned dam located in Haakon, South Dakota, along the TR-BAD RIVER.
Summary
Built in 1960 by the Natural Resources Conservation Service, this earth dam stands at a height of 12 feet and has a length of 400 feet. With a storage capacity of 200 acre-feet, it serves the primary purpose of water resource management in the area.
Regulated by the South Dakota Department of Environment and Natural Resources, Sd Noname 221 is classified as having a low hazard potential with a condition assessment of "Not Rated." While the dam has not been inspected recently, it is equipped with state-mandated features for permitting, inspection, and enforcement. The surrounding area benefits from the dam's normal storage capacity of 105 acre-feet and maximum discharge capability of 2500 cubic feet per second, providing essential water resources for the region.
Despite its remote location and limited public access, Sd Noname 221 plays a crucial role in water management for the local community. With its low hazard potential and adherence to state regulations, the dam serves as a reliable infrastructure for climate enthusiasts and water resource professionals alike. Its historical significance and ongoing maintenance ensure the continued protection of the surrounding environment and water supply.
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15-Day Weather Outlook
Year Completed |
1960 |
Dam Length |
400 |
Dam Height |
12 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Nid Storage |
200 |
Hazard Potential |
Low |
Nid Height |
12 |
Seasonal Comparison
5-Day Hourly Forecast Detail
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 221