Monticello Lake Reservoir Report

Nearby: Foy Gordon

Last Updated: December 5, 2025

Monticello Lake, located in San Juan, Utah, is a picturesque reservoir primarily used for recreation purposes.


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Summary

Managed by the Utah Division of Water Rights, this state-regulated lake offers a tranquil escape for water resource and climate enthusiasts. With a hydraulic height of 21 feet and a structural height of 25 feet, the Earth dam that forms Monticello Lake was completed in 1954 and boasts a storage capacity of 62 acre-feet.

Situated along Spring Creek, Monticello Lake covers a drainage area of 0.3 square miles and has a maximum storage capacity of 62 acre-feet, with a normal storage level of 27 acre-feet. The reservoir spans 327 feet in length and is a popular destination for outdoor activities such as fishing, boating, and hiking. Despite being classified as having a significant hazard potential, the dam's condition remains unrated, with the last inspection conducted in July 2019.

For those seeking a peaceful retreat in the heart of Utah's stunning landscape, Monticello Lake offers a serene setting for water recreation and appreciation of the natural environment. With its rich history dating back to the mid-20th century, this reservoir continues to be a beloved spot for locals and visitors alike, showcasing the beauty and importance of water resources in climate conservation efforts.

Year Completed

1954

Dam Length

327

River Or Stream

SPRING CREEK--OFFSTREAM

Primary Dam Type

Earth

Hydraulic Height

21

Drainage Area

0.3

Nid Storage

62

Structural Height

25

Hazard Potential

Significant

Nid Height

25
       
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.