Yerington No 2 Dam Reservoir Report
Nearby: Yerington Bb Dam Yerington Mill Dam
Last Updated: December 13, 2025
Yerington No 2 Dam, located in Lyon County, Nevada, is a privately owned earth dam primarily used for tailings storage.
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Summary
The dam, standing at a height of 10 feet and stretching 100 feet in length, holds a storage capacity of 10 acre-feet. Despite its small size, the dam plays a significant role in managing water resources in the region, particularly in the Walker River watershed.
The dam, regulated by the Nevada Division of Water Resources, poses a significant hazard potential and has been assessed as unsatisfactory in condition. With no spillway in place, the dam's emergency action plan readiness and risk management measures are unclear. The last inspection in November 2021 highlighted the need for improvements to meet safety guidelines and prevent potential hazards.
Water resource and climate enthusiasts should closely monitor the Yerington No 2 Dam's maintenance and regulatory updates to ensure its continued function in safeguarding the surrounding environment and communities from the risks associated with dam failure. The dam's role in tailings storage and water management makes it a crucial structure in the region, warranting attention to mitigate potential risks and enhance emergency preparedness.
Dam Length |
100 |
Dam Height |
10 |
River Or Stream |
WALKER RIVER-OS |
Primary Dam Type |
Earth |
Surface Area |
10 |
Drainage Area |
0.1 |
Nid Storage |
10 |
Outlet Gates |
Other Controlled - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
10 |
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.
Yerington No 2 Dam