Pond Gw-11 Dam Reservoir Report

Last Updated: December 5, 2025

Pond Gw-11 Dam, located in Henderson, Nevada, is a privately-owned structure designed by Western States Engineering and completed in 1998.


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Summary

This earth dam stands at a height of 23 feet and serves as a vital component in managing water resources in the region. With a storage capacity of 114 acre-feet and a normal storage level of 50 acre-feet, the dam plays a crucial role in regulating the flow of the Las Vegas Wash-OS river or stream.

The dam's primary purpose is categorized as "Other," indicating its multifaceted role in water management. Despite being classified as having a high hazard potential, the dam is currently assessed to be in fair condition as of the last inspection in October 2021. With an emergency action plan in place and regular inspections, the dam is equipped to handle any unforeseen events and ensure the safety of the surrounding area. Additionally, the risk assessment categorizes the dam as high risk, emphasizing the importance of proactive risk management measures.

As a significant feature in the water infrastructure of Clark County, Nevada, Pond Gw-11 Dam stands as a testament to the collaborative efforts of private entities and state regulatory agencies in ensuring the effective management of water resources. With its strategic location and design, the dam plays a crucial role in mitigating flood risks, regulating water flow, and safeguarding the surrounding environment. For water resource and climate enthusiasts, Pond Gw-11 Dam serves as a fascinating case study in the intersection of engineering, regulation, and environmental stewardship.

Year Completed

1998

Dam Length

3266

Dam Height

23

River Or Stream

LAS VEGAS WASH-OS

Primary Dam Type

Earth

Surface Area

16.8

Hydraulic Height

20

Drainage Area

0.2

Nid Storage

114

Structural Height

23

Outlet Gates

Other Controlled - 1

Hazard Potential

High

Foundations

Soil

Nid Height

23
       
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.