Pine Valley Reservoir Reservoir Report

Last Updated: December 5, 2025

Pine Valley Reservoir, located in Pine Valley, Utah, is a federally owned water resource managed by the USDA Forest Service.


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Summary

Completed in 1934, this Earth dam stands at a height of 36 feet and has a storage capacity of 112 acre-feet, primarily used for recreational purposes such as fishing and wildlife habitat. The reservoir is situated along the Santa Clara River, surrounded by the beautiful landscape of Washington County.

Despite its historical significance, Pine Valley Reservoir is facing challenges in terms of its condition assessment, with a poor rating and significant hazard potential. The dam received modifications in 2020 to strengthen its foundation, indicating ongoing efforts to ensure its safety and reliability. The risk assessment for the reservoir is moderate, highlighting the need for continued monitoring and management measures to mitigate potential risks.

As a key feature of the local ecosystem and a popular recreational destination, Pine Valley Reservoir serves as an essential water source for the region. With its picturesque setting and diverse wildlife, the reservoir offers a unique opportunity for outdoor enthusiasts to enjoy nature while also highlighting the importance of sustainable water resource management in the face of climate change.

Years Modified

2020 - Foundation

Year Completed

1934

Dam Length

590

Dam Height

36

River Or Stream

SANTA CLARA RIVER

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

27

Drainage Area

15

Nid Storage

112

Structural Height

45

Outlet Gates

Uncontrolled

Hazard Potential

Significant

Foundations

Soil

Nid Height

45
       
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.