Sand H Debris Reservoir Report

Last Updated: December 5, 2025

Sand H Debris is a critical flood risk reduction structure located in Monroe, Utah, along the Sand Canyon river.


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Summary

Constructed in 1971 by the USDA NRCS, this earth dam stands at a structural height of 30 feet and has a hydraulic height of 21 feet. With a storage capacity of 170 acre-feet, it serves the primary purpose of flood risk reduction for the local community and surrounding areas.

Managed by the Utah Division of Water Rights, Sand H Debris is deemed to have a high hazard potential with fair condition assessment. The dam undergoes inspection every two years, with the last inspection conducted in July 2019. While the structure meets regulatory standards and is state-permitted, there is currently no Emergency Action Plan (EAP) in place, highlighting the need for continued risk assessment and management measures to ensure the safety and stability of the dam.

Situated within the Los Angeles District, Sand H Debris plays a crucial role in protecting the region from potential flooding events. As water resource and climate enthusiasts, it is essential to monitor and support the maintenance and upkeep of such vital infrastructure to safeguard communities and natural resources in the face of changing environmental conditions.

Year Completed

1971

Dam Length

2500

River Or Stream

SAND CANYON

Primary Dam Type

Earth

Hydraulic Height

21

Drainage Area

3

Nid Storage

170

Structural Height

30

Hazard Potential

High

Nid Height

30
       
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.