Osborne #1 Reservoir Report
Nearby: Osborne Number 2 Calkins Dam
Last Updated: December 10, 2025
Osborne #1 is a privately owned earth dam located in Jones, South Dakota, with a primary purpose that is not specified in the data.
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Summary
Constructed in 1961, this dam stands at a height of 26 feet and stretches 234 feet in length, providing a maximum storage capacity of 23 acre-feet. Situated on a tributary of the Bad River, Osborne #1 is regulated by the South Dakota Department of Environment and Natural Resources (DENR), with state permitting, inspection, and enforcement measures in place to ensure its safety and compliance with regulations.
Despite its low hazard potential and a "Not Rated" condition assessment, Osborne #1 has not been evaluated in terms of emergency action preparedness, risk assessment, or inundation mapping. The dam's last inspection date, inspection frequency, and emergency action plan information are not available in the data. In the event of an emergency, the status of the dam's readiness and the effectiveness of its risk management measures remain uncertain. As water resource and climate enthusiasts, there is an opportunity to advocate for improved monitoring, assessment, and emergency preparedness protocols for Osborne #1 to enhance its overall resilience and safety in the face of changing environmental conditions.
Year Completed |
1961 |
Dam Length |
234 |
Dam Height |
26 |
River Or Stream |
TRIB. BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
23 |
Hazard Potential |
Low |
Nid Height |
26 |
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 #1