Weber Basin Equalizing Reservoir 18 Upper Reservoir Report

Last Updated: December 5, 2025

Weber Basin Equalizing Reservoir 18 Upper is a vital water resource located in Davis, Utah, managed by the Bureau of Reclamation.


°F

°F

mph

Wind

%

Humidity

Summary

This earth dam structure, completed in 1960, has a hydraulic height of 20 feet and a structural height of 22 feet, serving as a key component of the OS Davis-Weber Aqueduct. With a storage capacity of 21 acre-feet, this reservoir plays a crucial role in regulating water flow and ensuring water security for the surrounding area.

Despite its age, Weber Basin Equalizing Reservoir 18 Upper is regularly inspected by the Bureau of Reclamation to assess its condition and potential hazards. Classified as having a high hazard potential, this reservoir is subject to strict regulatory oversight to mitigate any risks. With a very high risk assessment rating, the management of this reservoir includes implementing measures to enhance its safety and resilience in the face of climate change impacts.

As a significant water infrastructure in Utah, Weber Basin Equalizing Reservoir 18 Upper highlights the importance of proactive risk management and regulatory compliance in ensuring the safety and sustainability of water resources in a changing climate. With ongoing monitoring and maintenance efforts by the Bureau of Reclamation, this reservoir continues to play a crucial role in meeting the water needs of the region while addressing potential risks associated with its operation.

Year Completed

1960

River Or Stream

OS DAVIS-WEBER AQUEDUCT

Primary Dam Type

Earth

Hydraulic Height

20

Nid Storage

21

Structural Height

22

Hazard Potential

High

Foundations

Rock

Nid Height

22
       
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.