Sand Dune Embankment Dam - South Reservoir Report
Last Updated: December 14, 2025
Sand Dune Embankment Dam - South, also known as Boulder Valley Emergency Storm Pond #3, is a privately owned structure located in Eureka, Nevada, specifically in the city of DUNPHY.
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Summary
Completed in 1996, this earth dam stands at a height of 16 feet and has a hydraulic height of 13 feet, serving multiple purposes including Fish and Wildlife Pond, Flood Risk Reduction, and more. It is situated on Boulder Creek and has a drainage area of 48.5 square miles, with a maximum discharge capacity of 2034 cubic feet per second.
With a storage capacity of 2153 acre-feet, this dam covers a surface area of 589 acres and spans a length of 9655 feet. It features an uncontrolled spillway with a width of 30 feet and an outlet gate in the form of a single valve. Despite its low hazard potential, the condition of the dam has not been rated, and the last inspection took place in May 2020. The risk assessment categorizes it as moderate, indicating a certain level of risk management measures in place.
Located in Congressional District 02, Nevada, Sand Dune Embankment Dam - South plays a crucial role in mitigating flood risks and providing essential habitat for wildlife in the area. The Nevada Department of Water Resources regulates and inspects the dam regularly to ensure its safety and functionality. As a significant part of the local water resource infrastructure, this dam contributes to the overall water management efforts in the region and highlights the importance of sustainable water resource practices in the face of changing climate conditions.
Year Completed |
1996 |
Dam Length |
9655 |
Dam Height |
16 |
River Or Stream |
BOULDER CREEK |
Primary Dam Type |
Earth |
Surface Area |
589 |
Hydraulic Height |
13 |
Drainage Area |
48.5 |
Nid Storage |
2153 |
Structural Height |
16 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
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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.
Sand Dune Embankment Dam - South