Valbnot Ratedg Roy No. 1 Reservoir Report
Nearby: Highway 44 #4 Ambnot Rated Bros No.1
Last Updated: December 14, 2025
Valbnot Ratedg Roy No.
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Summary
1 is a privately owned dam located in Mellette, South Dakota, along the tributary of Little White River. Completed in 1968, this earth dam stands at 25 feet tall and stretches 305 feet in length, with a storage capacity of 21 acre-feet. Despite being in a state-regulated jurisdiction, the dam's condition is currently listed as "Not Rated" with a low hazard potential.
Although Valbnot Ratedg Roy No. 1 has not been inspected recently and lacks updated emergency action plans, it remains a key structure for water resource management in the area. With a maximum discharge of 192 cubic feet per second, this dam plays a vital role in flood control and water supply for the region. Additionally, its location within the St. Paul District of the US Army Corps of Engineers highlights its importance in the overall water infrastructure network.
As climate change continues to impact water resources, the maintenance and monitoring of dams like Valbnot Ratedg Roy No. 1 become increasingly crucial. With potential risks associated with aging infrastructure and changing weather patterns, it is essential for stakeholders to prioritize the assessment and upkeep of these structures to ensure the safety and stability of the surrounding communities and ecosystems.
Year Completed |
1968 |
Dam Length |
305 |
Dam Height |
25 |
River Or Stream |
TRIB. LITTLE WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
21 |
Hazard Potential |
Low |
Nid Height |
25 |
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.
Valbnot Ratedg Roy No. 1