Vineyard Road Reservoir Report

Last Updated: December 5, 2025

Vineyard Road is a vital earth dam located in Pinal County, Arizona, designed by the USDA NRCS to reduce flood risks along the Queen Creek.


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Summary

Completed in 1967, this local government-owned structure stands at a height of 16 feet and has a structural height of 27.5 feet, with a length of 37,900 feet. With a storage capacity of 5,045 acre-feet and a surface area of 840 acres, this dam plays a critical role in managing water resources in the region.

Managed by the Arizona Department of Water Resources, Vineyard Road dam is state-regulated, inspected, and enforced to ensure its functionality and safety. Despite its high hazard potential, the structure's condition assessment remains satisfactory, with the last inspection conducted in January 2020. With a moderate risk assessment rating, this dam serves as a key flood risk reduction measure in the area, protecting surrounding communities from potential inundation during extreme weather events.

As an essential infrastructure for water resource management, Vineyard Road dam continues to play a crucial role in safeguarding the region against flooding and ensuring the sustainable utilization of water resources. With its strategic location in the Williams Air Force Base area, this earth dam stands as a testament to effective collaboration between the USDA NRCS, local government agencies, and the Arizona Department of Water Resources in addressing climate-related challenges and enhancing water security in Pinal County, Arizona.

Year Completed

1967

Dam Length

37900

Dam Height

16

River Or Stream

QUEEN CREEK - TR

Primary Dam Type

Earth

Surface Area

840

Drainage Area

49.6

Nid Storage

5045

Structural Height

27.5

Outlet Gates

Uncontrolled

Hazard Potential

High

Foundations

Soil

Nid Height

28
       
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.