Parker Reservoir Report

Last Updated: December 7, 2025

Parker Dam, located on the Colorado River in Arizona, is a federal-owned structure managed by the Bureau of Reclamation.


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Summary

Completed in 1938, this concrete dam stands at a height of 320 feet and serves multiple purposes including hydroelectric power generation, irrigation, and water supply. With a storage capacity of 180,000 acre-feet and a maximum discharge of 314,000 cubic feet per second, Parker Dam plays a crucial role in water resource management in the region.

The dam's high hazard potential and very high risk assessment highlight the importance of regular inspections and emergency preparedness. Despite its age, Parker Dam continues to be a key component of the water infrastructure in the area, providing essential services to the surrounding communities. With its controlled spillway and robust design, Parker Dam stands as a testament to engineering excellence and the ongoing efforts to ensure the safety and reliability of water resources in the region.

As climate change impacts water resources and infrastructure, the role of structures like Parker Dam becomes even more critical. With its strategic location on the Colorado River and its key functions in water management, Parker Dam serves as a vital lifeline for the region. Continued monitoring, maintenance, and risk management measures are essential to ensure the long-term sustainability and resilience of Parker Dam in the face of evolving climate challenges.

Year Completed

1938

Dam Length

856

Dam Height

320

River Or Stream

COLORADO RIVER

Primary Dam Type

Concrete

Surface Area

20390

Hydraulic Height

80

Drainage Area

9500

Nid Storage

180000

Structural Height

320

Hazard Potential

High

Foundations

Rock

Nid Height

320
       
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.