Alkali Dam Reservoir Report
Last Updated: May 2, 2026
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Alkali Dam, located in Humboldt, Nevada, was completed in 1941 primarily for irrigation purposes along the Virgin Creek.
Summary
Managed by the Fish and Wildlife Service, this earth dam stands at a structural height of 16 feet and stretches 235 feet in length, with a storage capacity of 1233 acre-feet and a surface area of 90 acres. Despite its low hazard potential, the dam's poor condition assessment in 2015 raises concerns about its long-term stability and maintenance.
The dam's proximity to the Sacramento District and its management by federal agencies like the DOI FWS highlight its significance in water resource management and climate conservation efforts in the region. With a moderate risk assessment rating and the presence of an uncontrolled spillway, the need for regular inspections and maintenance to ensure the dam's safety and functionality becomes crucial. Furthermore, the dam's location in a regulated state and its compliance with state permitting, inspection, and enforcement guidelines underscore its importance in upholding water resource regulations and environmental protection standards.
As a key infrastructure for irrigation in the area, Alkali Dam plays a vital role in supporting agricultural activities and water supply management in Humboldt, Nevada. However, with a poor condition assessment and a risk rating of moderate, continued monitoring and proactive measures are essential to safeguard the dam and mitigate potential hazards. The collaboration between federal and state agencies in regulating, inspecting, and operating the dam reflects a coordinated approach to ensure the sustainability of water resources and the protection of the surrounding environment for future generations.
Regional Streamflow Levels
15-Day Long Term Forecast
Year Completed |
1941 |
Dam Length |
235 |
Dam Height |
16 |
River Or Stream |
Virgin Creek |
Primary Dam Type |
Earth |
Surface Area |
90 |
Hydraulic Height |
16 |
Drainage Area |
126.7 |
Nid Storage |
1233 |
Structural Height |
16 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
16 |
Seasonal Comparison
5-Day Hourly Forecast Detail
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.
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