Sd Noname 186 Reservoir Report
Nearby: Wanblee Lake Dam John Alley
Last Updated: December 6, 2025
Sd Noname 186 is a privately owned dam located in Jackson, South Dakota, along the TR-WHITE RIVER.
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Summary
Constructed in 1950 by the Natural Resources Conservation Service, this earth dam stands at a height of 16 feet and has a length of 450 feet. With a maximum storage capacity of 95 acre-feet and a normal storage capacity of 40 acre-feet, Sd Noname 186 plays a crucial role in regulating water flow in the area.
Despite being categorized as a low hazard potential dam with a condition assessment of "Not Rated," Sd Noname 186 is regulated by the South Dakota Department of Environment and Natural Resources. The dam has the necessary permits, inspections, and enforcement in place to ensure its safe operation and compliance with state regulations. While the dam has not been assessed for emergency preparedness and risk management measures, it serves as a key infrastructure for water resource management in the region.
Owned and operated by a private entity, Sd Noname 186 provides essential water storage and flow regulation along the TR-WHITE RIVER. With a history dating back to 1950, this earth dam continues to serve its purpose effectively, contributing to the overall water resource management efforts in South Dakota. As a low hazard potential dam, Sd Noname 186 is closely monitored by state regulators to ensure its safety and compliance with regulatory standards, making it a vital piece of infrastructure for climate and water resource enthusiasts in the area.
Year Completed |
1950 |
Dam Length |
450 |
Dam Height |
16 |
River Or Stream |
TR-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
95 |
Hazard Potential |
Low |
Nid Height |
16 |
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 186