Winnemucca Lagoon #10 Dam Reservoir Report

Last Updated: December 16, 2025

Located in Lovelock, Humboldt County, Nevada, Winnemucca Lagoon #10 Dam stands as a testament to local government's commitment to water resource management.


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Summary

Completed in 1990, this Earth-type dam has a height of 10 feet and a length of 2,150 feet, providing essential water storage for the surrounding area. With a normal storage capacity of 12 acre-feet and a surface area of 11.9 acres, this dam plays a crucial role in regulating the flow of the Humboldt River-OS.

Managed by the Nevada Department of Water Resources, Winnemucca Lagoon #10 Dam is subject to regular inspections to ensure its structural integrity and safe operation. Classified as having a low hazard potential and fair condition, this dam has a high risk assessment rating, indicating the importance of continued monitoring and maintenance. Despite not having a spillway, the dam features one controlled outlet gate for water release when necessary.

For water resource and climate enthusiasts, Winnemucca Lagoon #10 Dam serves as a prime example of local infrastructure supporting sustainable water management practices. As an essential component in the region's water supply system, this dam highlights the vital role that careful engineering and maintenance play in protecting communities from potential risks associated with water storage and regulation.

Year Completed

1990

Dam Length

2150

Dam Height

10

River Or Stream

HUMBOLDT RIVER-OS

Primary Dam Type

Earth

Surface Area

11.9

Hydraulic Height

7

Drainage Area

0.1

Nid Storage

99

Structural Height

10

Outlet Gates

Other Controlled - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

10
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.