Amarillo Valley Road Reservoir Report

Last Updated: December 13, 2025

Amarillo Valley Road is a critical flood risk reduction structure located in the Pinal County of Arizona.


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Summary

This earth dam, completed in 1995, stands at a height of 7.5 feet and spans a length of 6318 feet, providing a storage capacity of 339 acre-feet. The dam serves the primary purpose of flood risk reduction and is under the regulatory oversight of the Arizona Department of Water Resources.

With a significant hazard potential and a moderate risk assessment rating, Amarillo Valley Road plays a crucial role in managing flood risks in the region. Despite its condition assessment being marked as "Not Rated," the dam undergoes regular inspections with an inspection frequency of 3 times per year. The structure is equipped with an uncontrolled spillway with a width of 13 feet, further enhancing its flood control capabilities.

For water resource and climate enthusiasts, Amarillo Valley Road represents a vital infrastructure for mitigating flood risks in the area. Its strategic location and design contribute to the overall resilience of the region against potential water-related hazards, highlighting the importance of proactive dam management and regulatory oversight in safeguarding communities and natural resources from flooding events.

Year Completed

1995

Dam Length

6318

Dam Height

7.5

River Or Stream

UNAVAILABLE

Primary Dam Type

Earth

Surface Area

69

Nid Storage

339

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

8
       
Seasonal Comparison

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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.