Sand Hollow West Dam Reservoir Report

Last Updated: December 13, 2025

Sand Hollow West Dam, located in Washington, Utah, is a privately-owned structure designed by RB&G Engineering for water supply purposes.


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Summary

Completed in 2002, this dam stands at a hydraulic height of 44 feet and a structural height of 51 feet, with a length of 7638 feet. With a high hazard potential but a satisfactory condition assessment, the dam is regulated by the Utah Division of Water Rights and undergoes regular inspections to ensure its safety and integrity.

Constructed with stone core and rock foundations, Sand Hollow West Dam has a storage capacity of 60,958 acre-feet, serving as a crucial water resource for the region. The dam's primary purpose is to provide water supply, contributing to the sustainability and resilience of the local water system. Despite its high hazard potential, the dam's condition assessment remains satisfactory, indicating effective maintenance and management practices.

With a spillway width of 20 feet and a location in an off-channel river setting, Sand Hollow West Dam plays a vital role in water management and flood control efforts in the area. Managed by private owners, this structure not only ensures reliable water supply but also highlights the importance of proactive monitoring and maintenance in safeguarding water resources and adapting to changing climate conditions.

Year Completed

2002

Dam Length

7638

River Or Stream

Off Channel

Hydraulic Height

44

Nid Storage

60958

Structural Height

51

Hazard Potential

High

Foundations

Rock

Nid Height

51
       
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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.