Loyd`S Lake(Monticello) Reservoir Report

Last Updated: December 5, 2025

Loyd's Lake in Monticello, Utah, is a privately owned reservoir primarily used for irrigation purposes.


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Summary

Constructed in 1984, this Earth-type dam has a hydraulic height of 125 feet and a structural height of 133 feet, providing a storage capacity of 4,300 acre-feet. Situated amidst the serene surroundings of San Juan County, Loyd's Lake serves as a crucial water resource for the local community, drawing water from South Creek and Pole Creek.

Managed by the Utah Division of Water Rights, Loyd's Lake boasts a high hazard potential but maintains a satisfactory condition assessment. With a maximum discharge capacity of 140 cubic feet per second, this reservoir plays a vital role in agricultural water supply and management in the region. Despite its remote location, Loyd's Lake serves as a significant example of sustainable water resource development and regulation in Utah, ensuring water security for the surrounding areas.

While Loyd's Lake may not be widely known outside the realm of water resource and climate enthusiasts, its importance in supporting irrigation activities and water management in the region cannot be understated. As a private reservoir regulated by the state, Loyd's Lake stands as a testament to the effective collaboration between private ownership and state agencies in ensuring the sustainable utilization of water resources for the benefit of local communities.

Year Completed

1984

Dam Length

1500

River Or Stream

SO. CREEK & POLE CREEK

Primary Dam Type

Earth

Hydraulic Height

125

Drainage Area

13

Nid Storage

4300

Structural Height

133

Hazard Potential

High

Nid Height

133
       
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.