North Utah County - Tibble Fork Reservoir Report

Last Updated: December 4, 2025

North Utah County - Tibble Fork is a vital water resource located in American Fork, Utah, managed by the local government and designed by the USDA NRCS.


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Summary

This dam, completed in 1966, serves primarily for irrigation purposes and is regulated by the Utah Division of Water Rights. With a height of 49.5 feet and a normal storage capacity of 380 acre-feet, it plays a crucial role in water management in the region.

The dam on the North Fork of the American Fork River has a high hazard potential but is currently assessed as satisfactory. It underwent its last inspection in August 2020 and is subject to regular state permitting, inspection, and enforcement. With a drainage area of 35 square miles and a maximum discharge of 117 cubic feet per second, Tibble Fork reservoir provides essential water storage for agricultural and environmental needs in the area.

Despite its age, North Utah County - Tibble Fork continues to play a key role in water management and conservation efforts in the region. With its significant storage capacity and regulatory oversight, it ensures a reliable water supply for irrigation while also addressing the potential risks associated with its high hazard potential. For water resource and climate enthusiasts, this dam represents a critical infrastructure for sustainable water management in Utah County.

Year Completed

1966

Dam Length

520

River Or Stream

NO FK OF AMERICAN FORK RIVER

Primary Dam Type

Earth

Hydraulic Height

40

Drainage Area

35

Nid Storage

610

Structural Height

49.5

Hazard Potential

High

Nid Height

50
       
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.