Blackjack Dam Reservoir Report
Nearby: Preston Lower Dam Gardner Dam
Last Updated: January 10, 2026
Blackjack Dam, located in White Pine, Nevada, is a privately owned structure that serves primarily for irrigation purposes.
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Summary
Completed in 1932, this earth dam stands at a height of 10 feet and has a length of 550 feet, holding a storage capacity of 35 acre-feet. Situated on the White River, Blackjack Dam plays a crucial role in providing water for fire protection, stock, and small fish pond needs in the area.
Despite its historical significance, Blackjack Dam is currently assessed as being in poor condition with a significant hazard potential. The dam has a controlled spillway and is equipped with three slide gates for water release. Its inspection frequency is set at 3 years, with the last evaluation conducted in April 2021. With a very high risk assessment rating, stakeholders and regulators are closely monitoring the dam's structural integrity and considering necessary risk management measures to mitigate potential hazards.
As a key feature in the local water resource management system, Blackjack Dam remains under state jurisdiction and regulation by the Nevada Department of Water Resources. With its location in a region prone to climate variability, the dam's role in sustaining agricultural activities and environmental conservation is crucial. Efforts to improve the dam's condition and ensure its long-term functionality are essential for safeguarding water resources and supporting the community's water needs in the face of changing climate conditions.
Year Completed |
1932 |
Dam Length |
550 |
Dam Height |
10 |
River Or Stream |
WHITE RIVER-TR |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
7 |
Drainage Area |
6 |
Nid Storage |
35 |
Structural Height |
10 |
Outlet Gates |
Slide (sluice gate) - 3 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Preston Big Spring Nr Preston Nv
|
10cfs |
Water Canyon Cr Nr Preston Nv
|
1cfs |
Steptoe C Nr Ely
|
2cfs |
Big Spring Nr Duckwater
|
14cfs |
Cleve C Nr Ely
|
8cfs |
Lehman Creek Near Baker
|
21cfs |
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.
Blackjack Dam