Winnemucca Lagoon #8 Dam Reservoir Report

Last Updated: December 16, 2025

Located in Lovelock, Nevada, Winnemucca Lagoon #8 Dam is a local government-owned structure that plays a crucial role in water resource management in the area.


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Summary

Built in 1970, this earth dam stands at a height of 9 feet and serves multiple purposes, with a primary focus on providing storage for the surrounding area. With a storage capacity of 68 acre-feet, the dam helps regulate water flow in the Humboldt River-OS, benefiting both local communities and the environment.

Despite its low hazard potential, the dam is subject to regular inspections by the Nevada Division of Water Resources to ensure its structural integrity and functionality. The latest inspection in September 2021 assessed the dam's condition to be fair. With an emergency action plan in place and a risk assessment rating of high, the authorities are proactive in managing any potential risks associated with the dam. Winnemucca Lagoon #8 Dam stands as a testament to effective water resource management in the region, highlighting the importance of sustainable infrastructure for climate enthusiasts and water resource professionals alike.

Year Completed

1970

Dam Length

910

Dam Height

9

River Or Stream

HUMBOLDT RIVER-OS

Primary Dam Type

Earth

Surface Area

8.4

Hydraulic Height

6

Drainage Area

0.1

Nid Storage

68

Structural Height

9

Outlet Gates

Other Controlled - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

9
       
Seasonal Comparison

Weather Forecast

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.