Gypsum Wash Reservoir Report

Last Updated: December 15, 2025

Gypsum Wash is a privately-owned earth dam located in Washington County, Utah, with a primary purpose of water resource management.


°F

°F

mph

Wind

%

Humidity

Summary

Constructed in 1975 by the USDA NRCS, this dam has a hydraulic height of 22 feet and a structural height of 26 feet, providing a storage capacity of 430 acre-feet. The dam is regulated by the Utah Division of Water Rights and undergoes regular inspections to ensure its structural integrity.

With a drainage area of 1.6 square miles, Gypsum Wash plays a crucial role in flood control and water supply management in the region. Despite being classified as having a high hazard potential, the dam is currently in fair condition according to the most recent inspection in November 2020. The dam's emergency action plan status and risk assessment information are currently unavailable, highlighting the need for continued monitoring and management of this vital water resource infrastructure.

Located within the Los Angeles District, Gypsum Wash serves as a key component of the local water management system, providing essential services to the surrounding communities. As climate change continues to impact water resources, the maintenance and proper regulation of structures like Gypsum Wash are essential for mitigating potential risks and ensuring the sustainable use of water in the region.

Year Completed

1975

Dam Length

3160

River Or Stream

GYPSUM WASH

Primary Dam Type

Earth

Hydraulic Height

22

Drainage Area

1.6

Nid Storage

430

Structural Height

26

Hazard Potential

High

Nid Height

26
       
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.