Southeast Power Link
See how new infrastructure will enhance electric system reliability and enable community growth in the Southeast Valley.
About the project
On Nov. 7, 2018, the Arizona Corporation Commission unanimously approved a Certificate of Environmental Compatibility for a power line project that will enable SRP to meet growing energy needs in the Southeast Valley. Read press release.
The approval is the final step of the application for the Southeast Power Link project submitted by SRP to the ACC that allows for construction of seven miles of new overhead 230-kilovolt (kV) power lines. A half-mile of the proposed route will be located in Queen Creek and the remainder in Mesa. The project also includes a new 230/69-kV receiving station.
The project will help SRP provide needed electricity for anticipated residential, commercial and industrial customer growth in the general area east of the Phoenix-Mesa Gateway Airport.
Need and benefit
The Southeast Valley has already seen significant development, and local and SRP officials anticipate even more growth in the commercial, industrial and residential sectors. Additions to the power system will enhance reliability for current and future customers while supporting the area's growing economy.
Why start now?
- By starting now, SRP can coordinate transmission line siting activities with other infrastructure projects planned for the region such as airport expansion and new SR24 freeway construction.
- Economic growth is on the rise. Several large industrial customers are constructing new facilities or have expressed interest in locating operations in this region, which will increase energy demand.
- For more than 100 years, SRP has focused on the big picture. With forward thinking and collaboration with customers, we can continue our efforts to keep affordable and reliable power flowing to the Valley and enable growth in the communities we serve.
Public input and routes
SRP conducted a robust public process which included extensive outreach activities. The process included 40 meetings with municipalities, agencies, landowners and other stakeholders. In addition, SRP held a public open house on May 14, 2018, to solicit input on potential route options from local residents and businesses.
Based on this feedback, SRP filed an application for a Certificate of Environmental Compatibility (CEC) with the Arizona Corporation Commission (ACC) on Aug. 1, 2018, for the project components below.
- The project includes 7 miles of new overhead 230-kilovolt (kV) power lines, which will run along the approved route shown in green on the map below. A half-mile of the route will be located in Queen Creek and the remainder in Mesa.
- The project also includes a 230/69 kV receiving station, which will be located somewhere within the orange area shown on the map.
On Nov. 7, 2018, the Arizona Corporation Commission unanimously approved a Certificate of Environmental Compatibility for the project. The approval is the final step of the application process and enables SRP to move forward with land acquisition, project design and construction.
Power system overview
SRP relies on a vast network of critical components such as generating stations, transmission lines and substations to deliver energy to customers in a way that is reliable, affordable and aligns with our 2035 sustainability goals. The diagram below illustrates this process:
The type of transmission pole proposed for the Southeast Power Link project is approximately 100-150 feet tall with a diameter of 4–8 feet. The chart below helps put this size in perspective compared to other types of transmission poles for different system voltage levels. Poles as tall as 170 feet may be needed for unique cases such as freeway crossings.
FAA height considerations
Given the proximity of the project to the Phoenix-Mesa Gateway Airport, SRP submitted an application to the Federal Aviation Administration (FAA) to obtain a review of the proposed route. On Sept. 6, 2018, the FAA issued a “Does Not Exceed” determination for the project. This determination is the final step in the FAA’s review and confirms that the structures do not exceed any obstruction standards, and do not have any substantial adverse physical or electromagnetic interference effect on navigable airspace or navigation facilities.
Sample 230 kV Line
Sample 230 kV Substation
Project schedules below are subject to change.
- Phase 1: Construction from April 2022 to the in-service date of April 30, 2023. Scott 230/69kV Transmission Substation and SPL North Line (from Scott Substation north to the EHV corridor).
- Phase 2: Construction from May 2023 to the in-service date of April 30, 2024. SPL South Line (from Scott Substation south to the future Abel-Santan line tie-in.)
March 2021, upcoming site activity
Construction: Begin Substation Grading June 2021
Substation Construction: Beginning Summer 2021
Line Construction: Beginning May 2022
Site preparation and enclosure activities will begin at the substation site in June 2021 and will last approximately five months. This will prepare the gradeand site for general construction activities. We anticipate construction activities at the substation to commence in summer of 2021 and continue through 2023.
SRP Receives Final Approval for Southeast Power Link Project
Earlier today, the Arizona Corporation Commission unanimously approved a Certificate of Environmental Compatibility for a power line project that will enable Salt River Project to meet growing energy needs in the Southeast Valley.Read more
SRP Receives Line Siting Committee Approval for Proposed Southeast Power Link Project
At the conclusion of public hearings, the Arizona Power Plant and Transmission Line Siting Committee unanimously recommended approval of a Certificate of Environmental Compatibility (CEC) for a power line project that will enable Salt River Project to meet growing energy needs in the Southeast Valley.Read more
SRP files supplement to CEC application
SRP filed a supplement to its application for a Certificate of Environmental Compatibility for the Southeast Power Link project. This filing narrows the application to delete the route option on the northeast side of State Route 24 (SR-24).Read more
SRP Submits Application for Southeast Power Link Permit
Salt River Project has filed an application for a Certificate of Environmental Compatibility (CEC) with the Arizona Power Plant and Transmission Line Siting Committee seeking to permit new power lines that will enable the utility to meet growing energy needs in the Southeast Valley.Read more
SRP hosts in-person open house
SRP hosted a public, in-person open house in Mesa to gather comments about potential routes.Read more
SRP Proposes Southeast Power Link Project
To address the growing demand for electricity, Salt River Project is initiating a process to site 230- kilovolt (kV) power lines in southeast Mesa and northern Queen Creek. This area has already seen significant development, and local and SRP officials anticipate even more growth in the commercial, industrial, and residential sectors.Read more