Osborne Number 2 Reservoir Report
Nearby: Osborne #1 Calkins Dam
Last Updated: December 11, 2025
Osborne Number 2 is a privately-owned earth dam located in Jones, South Dakota, along the TR-BAD RIVER.
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Summary
Built in 1959 by the Natural Resources Conservation Service, this dam stands at a height of 19 feet and has a storage capacity of 118 acre-feet. With a low hazard potential and a "Not Rated" condition assessment, Osborne Number 2 is regulated by the South Dakota Department of Environment and Natural Resources, ensuring that it meets state inspection, enforcement, and permitting requirements.
Although the dam has not been inspected recently and lacks an Emergency Action Plan (EAP), it still plays a vital role in water resource management and flood control in the area. The dam's construction was funded by the federal government and is under the jurisdiction of the St. Paul District of the US Army Corps of Engineers. Additionally, Osborne Number 2 is situated in a region represented by Dusty Johnson, a Republican Congressman, showing the importance of this structure in the local community and its impact on water resource management in South Dakota.
Overall, Osborne Number 2 serves as a key piece of infrastructure in the region, providing water storage and flood protection along the TR-BAD RIVER. While it has not been recently assessed for condition or emergency preparedness, its low hazard potential and regulatory oversight by the state ensure that it continues to fulfill its purpose effectively. As water resource and climate enthusiasts, monitoring and maintaining structures like Osborne Number 2 is essential for sustainable water management and resilience to changing environmental conditions.
Year Completed |
1959 |
Dam Length |
598 |
Dam Height |
19 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
118 |
Hazard Potential |
Low |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bad R Near Fort Pierre Sd
|
7cfs |
White River Near White River
|
42cfs |
Little White R Below White River Sd
|
141cfs |
Black Pipe Creek Nr Belvidere
|
2cfs |
White R Near Oacoma Sd
|
105cfs |
White R Near Kadoka Sd
|
73cfs |
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.
Osborne Number 2