South Mountain Transmission Project

Public Hearing

A public hearing will be held before the Arizona Power Plant and Transmission Line Siting Committee as follows:

Vee Quiva Resort & Casino
15091 S. Komatke Lane 
Laveen Village, AZ 85339

The hearing will commence on Tuesday, Nov. 12, 2024, at 10 a.m., and will continue each weekday through Wednesday, Nov. 20, 2024, as necessary, at the same location beginning at 9 a.m. on each day unless a tour is taken.

If you can't make the public hearing in-person, you can join online:

Mobile and telephone options for the public hearing:

One tap mobile:
+16027530140,,84097074920# US (Phoenix)

Telephone:
Dial(for higher quality, dial a number based on your current location):
+1 602 753 0140 US (Phoenix)
Webinar ID: 840 9707 4920

Mobile options for public comments:

One tap mobile:
+16027530140,,83770630114# US (Phoenix)
8778535257,,83770630114# US Toll-free

Dial by your location

• +1 602 753 0140 US (Phoenix)
• 877 853 5257 US Toll-free
• 888 475 4499 US Toll-free

Meeting ID: 837 7063 0114

Find your local number: Zoom link.

Certificate of Environmental Compatibility (CEC) Application

On Thursday, September 26, 2024, SRP filed with the Arizona Corporation Commission. A link to the CEC application is here. There will be a public hearing associated with the CEC. The routes filed in the CEC application are included below:

SRP is currently working with ADOT to study the feasibility of a route or route segments on the east side of Loop 202. If, ultimately, the studies deem the east side of Loop 202 incompatible with transmission infrastructure, then Route S4 and Segments H-I-K would not be feasible. Accordingly, SRP’s CEC application identifies S5 Segment H-J-K as a contingent preferred segment in the event the route or route segments on the east side of Loop 202 are not feasible.

SRP’s Proposed Preferred Route Option

The map below is SRP’s proposed preferred route option with nodes (segments). The routes identified throughout the public process were further analyzed to select preferred routes for the Application. During the public and siting process, routing criteria was discussed, and agencies, stakeholders and the public weighed in on opportunities for siting transmission lines and constraints associated with the line routes. This input was used to help develop criteria to determine the preferred routes. The Project requires two transmission routes in each routing area. Ultimately, based on stakeholder and public input along with the routing criteria and analysis, SRP selected Preferred Routes as follows: 

South Routing Area
Preferred Routes:
S2
S3 to Segment H-I-K

North Routing Area
Preferred Routes:
N2
N3
Contingent Preferred Segments:
S5 to Segment H-J-K

From the time of filing this Application to the time of the Arizona Power Plant and Transmission Line Siting Committee Hearing, SRP will continue to meet with agencies, stakeholders and the public and, based on these discussions, may include additional details and refined routing preferences in the Arizona Power Plant and Transmission Line Siting Committee Hearing.

New route option added to map

As we continue working with the landowners, stakeholders and members of the public, we are working on analyzing all possible route alternatives. Additional routes are being considered and would like to ensure we obtain feedback on all routing options in our upcoming open houses.

Proposed route map for September 2024 Open Houses (new routes proposed)

The map below identifies new proposed route alternatives for the 230 kV lines as well as other project components after incorporating public input during open houses and other stakeholder meetings.

Original proposed route map from May and June 2024 Open Houses

The map below identifies the route alternatives for the 230 kV lines, the location of the 500 kV transmission and new planned substation.

Transmission line structure types

Below are typical SRP transmission structure types. The structure types that will be used on this project are the 500kV 140’-160’ and 230/69kV 120’-160’ type structures.

News archive

The latest project news and announcements will be added here when available.

Contact us

If you have questions about the project, please call 1-855-584-1484 or email 2872line@srpnet.com.

South Mountain Transmission Project Feedback Form