Long Lake Reservoir Report

Last Updated: December 4, 2025

Long Lake, located in Woodland, Utah, is a private water resource regulated by the Utah Division of Water Rights.


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Summary

Built in 1923 for irrigation purposes, this earth dam stands at a height of 27 feet and has a hydraulic height of 22 feet. With a storage capacity of 1140 acre-feet, Long Lake primarily serves the agricultural needs of the area, holding a normal storage level of 860 acre-feet.

Situated on a tributary of the North Fork Provo River, Long Lake covers a surface area of 355 feet and has a low hazard potential, with a condition assessment of "Not Rated." The dam has not been inspected since July 2011, with an inspection frequency of 5 years. Despite its age, Long Lake remains a vital resource for the local community, showcasing the importance of sustainable water management practices in the face of changing climate patterns and water availability.

As climate enthusiasts and water resource professionals monitor the impact of climate change on water availability, Long Lake stands as a reminder of the critical role of infrastructure in ensuring water security. With its historical significance and continued utility for irrigation, Long Lake serves as a testament to the resilience of water resource management in the face of evolving environmental challenges.

Year Completed

1923

Dam Length

355

River Or Stream

TRIB OF NO. FK. PROVO RIVER

Primary Dam Type

Earth

Hydraulic Height

22

Drainage Area

1

Nid Storage

1140

Structural Height

27

Hazard Potential

Low

Nid Height

27
       
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.