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Project Red Hawk

Formerly the Allium Project. See how new electric infrastructure will support the growing technology industry in Mesa.

About the project

SRP has received a request to provide energy to a commercial customer on its new 187-acre parcel for a data center located in east Mesa, Arizona. As a public power provider, SRP is responsible for ensuring that all customers are served with affordable and reliable electrical services.

SRP filed a permit application through the Arizona Corporation Commission (ACC). On Dec. 10, 2019, the ACC unanimously approved the Certificate of Environmental Compatibility for the project. The approval is the final step of the application process and enables SRP to move forward with project design and construction.

Project map

The property is located on land that is in an area designated for industrial, employment and mixed-use development. The area is actively marketing to high-tech customers south of the existing SRP Browning to Santan high-voltage power line corridor.


The project will connect a new 230 kV switchyard to the existing Browning to Santan power line located in SRP’s transmission corridor immediately north of the project site. The switchyard will serve 230 kV transformers connected by up to 22 double-circuit structures with an average height of 130 feet. Each of these transformers will be strategically placed throughout the customer’s property to serve a portion of the customer load. All electrical facilities will be located on SRP's right-of-way or on the customer-owned parcel. 

Public outreach

As a public power provider, SRP is responsible for ensuring that all customers are served with affordable and reliable electrical services. As a first step in providing service, SRP notified property owners and stakeholders within a half mile of the proposed data center.

On Sept. 23, 2019, SRP filed a permit application for a Certificate of Environmental Compatibility (CEC) through the Arizona Corporation Commission (ACC). With SRP's filing, the Arizona Power Plant and Transmission Line Siting Committee conducted public hearing sessions and developed a recommendation to the ACC for its consideration.

ACC approval

On Dec. 10, 2019, the ACC unanimously approved the CEC for the project. The approval is the final step of the application process and enables SRP to move forward with project design and construction.

For more than 100 years, SRP has focused on long-range planning and collaboration that supports economic development by providing reliable energy supplies that enable growth and high-tech development in the communities we serve.

Design and engineering

View visual renditions of the project below. The renderings do not reflect any potential buildings or other onsite infrastructure, as specific site plans are under development and will depend on the customer's needs.

Transmission line structures

The typical 230-kV pole is 110 to 130 feet tall with a pole diameter of four feet and double-circuit 230-kV line.

Construction information

On Dec. 10, 2019, the Arizona Corporation Commission approved the Certificate of Environmental Compatibility (CEC) for the construction of infrastructure to serve a commercial customer on the customer's 187-acre parcel for a data center located near Elliot and Sossaman Roads in East Mesa, Arizona. Construction activities are expected to begin in January 2022.

Project scope

SRP will be constructing new electrical facilities consisting of a 230 kV switchyard, known as Sidewinder, and associated 230 kV transmission lines to serve the initial build of a customer-owned, planned data center project. The initial infrastructure will connect a new 230 kV switchyard to the existing Browning to Santan transmission line, located in SRP’s transmission corridor immediately north of the project site. The Sidewinder switchyard will serve a customer-planned distribution substation, known as Diamondback, through a new double-circuit 230 kV line within the project site. The Sidewinder switchyard is ultimately planned to serve up to three customer-owned substations using double-circuit pole structures that have an anticipated average height of 130 feet.

*All planned electrical facilities will be located on SRP’s right of way or on the customer-owned parcel also known as the parcel site.

Upcoming site activity: Site grading and switchyard

In January 2022, site preparation activities will begin on the Sidewinder switchyard. This will prepare the site grade for general construction activities to begin in the spring. This phase of construction is anticipated to commence in January 2022 and last through April 2023.

Switchyard dimensions

The Sidewinder switchyard is planned to be enclosed by a perimeter block wall that is approximately 10 to 12 feet tall and has an overall footprint of approximately 670 feet east-west by 550 feet north-south. The maximum anticipated height of the structures within the switchyard is 65 feet. Because the final designed dimensions of Sidewinder may differ some from these dimensions, we encourage you to visit the project website below for the latest details.

Below is a pictorial rendering of the anticipated switchyard. As we finalize the design of the new electrical facilities, we will include additional pictorials on the project website.

Switchyard

A switchyard is a facility that connects two or more transmission circuits of the same voltage together (therefore no transformers are required). The switchyard monitors and protects each high-voltage circuit and provides operational control to ensure the system is safe, reliable and maintainable.

*We encourage all builders and developers to include this information in their disclosure statements.

Substation

A distribution substation is an electrical facility that converts high-voltage circuits, such as 230 kV, to low-voltage circuits, such as 13.8 kV, by using one or more transformers. The substation also monitors and protects each high- and low-voltage circuit and provides operational control to ensure the system is safe, reliable and maintainable.

Contact SRP about Project Red Hawk

To submit questions or comments regarding Project Red Hawk, please call (602) 236-2872(602) 236-2872 or email 2872Line@srpnet.com.