Bachelor No. 1 Reservoir Report
Nearby: Olson No. 2 Olson No. 1
Last Updated: December 8, 2025
Bachelor No.
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Summary
1 is a privately owned dam located in Mellette, South Dakota, along the TRIB-WHITE RIVER. Built in 1971, this earth dam stands at 26 feet high and has a storage capacity of 25 acre-feet. With a low hazard potential, this structure is regulated by the South Dakota Department of Environment and Natural Resources (DENR), ensuring that it meets state inspection, enforcement, and permitting standards.
Managed by private owners, Bachelor No. 1 plays a crucial role in water resource management in the area, providing necessary storage for irrigation and other purposes. Although its condition is currently rated as "Not Rated," this dam's importance in the region's water infrastructure cannot be understated. With a maximum discharge capacity of 288 cubic feet per second, it serves as a reliable structure for maintaining water levels in the surrounding area.
As a key component of the St. Paul District of the US Army Corps of Engineers, Bachelor No. 1 stands as a testament to effective water resource management and infrastructure development. Its location along the TRIB-WHITE RIVER highlights its significance in maintaining water supply and ensuring the overall health of the region's water resources. For water resource and climate enthusiasts, this dam represents a vital piece of the puzzle in understanding and managing water systems in South Dakota.
Year Completed |
1971 |
Dam Length |
270 |
Dam Height |
26 |
River Or Stream |
TRIB-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Nid Storage |
25 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
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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.
Bachelor No. 1