Utah Lake Reservoir Report

Last Updated: December 5, 2025

Utah Lake is the largest freshwater lake in Utah, covering an area of about 148 square miles.


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Summary

The lake has a rich history dating back to the Native Americans who inhabited the region. The hydrology of Utah Lake is unique, as it is fed by several rivers and streams, including Provo River, Spanish Fork River, and Hobble Creek. The lake also receives water from snowpack in the surrounding mountains, with the spring snowmelt resulting in high flows into the lake.

The lake is crucial for agriculture in the Utah Valley region, with water from the lake used for irrigation of crops such as alfalfa and fruit trees. It is also a popular recreational spot, with activities such as fishing, boating, and swimming enjoyed by locals and tourists. However, the lake has faced challenges in recent years with pollution and invasive species such as carp and quagga mussels impacting the ecosystem. Efforts are being made to address these issues and preserve the lake for future generations.

Reservoir Details

Storage 24hr Change -1.16%
Percent of Normal 113%
Minimum 11,188.0 acre-ft
1935-10-05
Maximum 1,454,400.0 acre-ft
1984-06-15
Average 564,837 acre-ft
Hydraulic_Height 6
Drainage_Area 3010
Year_Completed 1988
Nid_Storage 1369894
Hazard_Potential Low
Structural_Height 9
River_Or_Stream JORDAN RIVER
Dam_Length 1100
Primary_Dam_Type Earth
Nid_Height 9
       
Seasonal Comparison
Water Surface Elevation Levels
Storage Levels
Pool Elevation Levels

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.