Adobe Wash Sediment Basin Reservoir Report

Last Updated: December 5, 2025

The Adobe Wash Sediment Basin, located in Orangeville, Utah, was designed by Johansen & Tuttle and completed in 2017 for the primary purpose of flood risk reduction.


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Summary

This private-owned Earth dam stands at a structural height of 34 feet, with a hydraulic height of 31 feet, providing a storage capacity of 78 acre-feet. The basin covers a drainage area of 1.4 square miles and has a maximum discharge capacity of 130 cubic feet per second.

Managed by the Utah Division of Water Rights, the Adobe Wash Sediment Basin is subject to state regulations, inspections, and enforcement to ensure its proper functioning and safety. With a significant hazard potential, the basin has an inspection frequency of 3 years and has not been rated for condition assessment. Although no Emergency Action Plan (EAP) has been prepared or updated, the basin serves as a crucial infrastructure to mitigate flood risks in the region.

In the event of a potential emergency, it is essential for stakeholders to stay informed about the Adobe Wash Sediment Basin and its risk management measures. With its strategic location and design features, this sediment basin plays a key role in protecting the surrounding area from the adverse impacts of sedimentation and flooding, highlighting the importance of water resource management and climate resilience in the region.

Year Completed

2017

Dam Length

360

Primary Dam Type

Earth

Hydraulic Height

31

Drainage Area

1.4

Nid Storage

78

Structural Height

34

Hazard Potential

Significant

Nid Height

34
       
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.