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Cotton Transmission Corridor 500kV/230kV
aps
Voltage: 500kV and 230kV
Estimated Completion Date: 2031/2032
Location: SW Valley Region (Gila Bend, Buckeye, Goodyear and Avondale)
Why this project is needed:
New 230 kilovolt (230kV) and 500 kilovolt (500kV) power lines are needed to improve electrical infrastructure and enhance reliability for current and future APS customers in the Western Maricopa County region. We are continuing studies to determine appropriate routes for these lines, which will connect new and existing substations in Gila Bend, Buckeye, Goodyear and Avondale.
Open Houses
In-Person Open Houses:
Your input is very important to us. We invite you to attend any of our public open houses at the dates and times listed below. No formal presentation will be given, allowing everyone to attend at any time within the two-hour window to speak one-on-one with team members, learn more about the project, ask questions and provide additional comments.
October 20, 2025 / 5-7 p.m.
Goodyear Recreation Center
420 S. Estrella Pkwy.
Goodyear, AZ 85338
October 21, 2025 / 5-7 p.m.
Buckeye Elementary School
210 S. 6th St.
Buckeye, AZ 85326
October 22, 2025 / 5-7 p.m.
Gila Bend Library
777 N. Logan Ave.
Gila Bend, AZ 85337
Virtual Open Houses:
If you are unable to attend our in-person open house you can visit our virtual open house.
We encourage your comments and input related to the project, especially regarding potential route alignments.
Although comments are encouraged throughout the duration of the project, we request that you submit them during the open house comment period, which ends November 25, 2025. This allows for timely review and consideration of your input during the siting process.
Project Details
- Over 100 miles of new and rebuilt 230kV and 500kV transmission lines interconnecting multiple substations
- Crosses primarily private, BLM and State Trust Land
- Avoids protected areas, such as the Buckeye Hills Regional Park, Sonoran Desert National Monument and Estrella Mountain Regional Park
- Federal land crossings (BLM) will require undergoing a NEPA process prior to submitting for a CEC with the state.
Phase 1 Scope
- Component 1: Build a new 40-mile, double-circuit transmission line with one 500-kilovolt circuit and one 230-kilovolt circuit. The line will run from the Panda Substation to the existing Jojoba Substation, the new Hazen Substation, the Freedom Substation, and end at the future TS-21 Substation
- Component 2: A new approximately 7-mile 230kV transmission line from the future TS-21 Substation to the existing Broadway Substation
- Component 3: A new approximately 1.5-mile 230kV transmission line from the TS-21 Substation to the existing Stratus to Runway 230kV transmission line
- Component 4: A new 230kV connection to the Freedom Substation from the future Panda – Jojoba – Hazen – Freedom – TS-21 Connection (Component 1), estimated to be less than one mile in length
- Component 5: A new 230kV connection to the future Hazen Substation from the future Panda – Jojoba – Hazen – Freedom – TS-21 Connection (Component 1), estimated to be less than one mile in length
Phase 2 Scope
- Component 1: A rebuild of the existing single-circuit 230kV transmission line to a double-circuit 500kV and 230kV transmission line, approximately 30 miles long between Panda, Jojoba and Hazen Substations
- Component 2: A new double-circuit 500kV and 230kV connection, estimated to be about nine miles long, between the future Hazen and TS-21 Substations
- Component 3: A rebuild of an existing double-circuit 230kV transmission line to a double-circuit 500kV and 230kV transmission line, approximately 11 miles long between the future TS-21 Substation and existing Rudd Substation
- Component 4: A rebuild of an existing single 230kV circuit, about 11 miles long from the future Hazen substation to the existing Freedom substation
Preliminary Route Alternatives
View our interactive map for a more detailed look at this project and other projects our teams are working on.
Project Features
This project will primarily include Monopole (single-pole) structures, but a variety of steel structure types may be used. These structure heights typically range from 130 – 200 feet depending on routing, terrain and crossing of existing structures, including elevated roads and other power lines.
Any opportunity to use existing power line routes for the new structures will be considered. However, new rights of way and/or easements, approximately 120 to 300 feet wide, will be needed.
Related Documents
Cotton Transmission Corridor Newsletter - Spring 2025
Cotton Transmission Corridor Newsletter - Fall 2025
Preliminary Links Map
This map contains several numbered links that you can reference as you provide input related to any link. The Preliminary Links Map is also found within the virtual open house.
Open House March 2025 Slides (26MB PDF)
Project Contact:
Stephen Eich
Senior Siting Consultant
CTC@aps.com
Project Phone Number: 623-220-2611
How power gets to you
The illustration below shows how energy is delivered to you, including how it is generated, transmitted long distances and finally distributed to your homes and businesses.
Thank you for providing valuable input that helps us serve your area with safe and reliable energy now and into the future.
