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We've completed the siting process for many facilities that are in the pre-construction or construction phases of development.
​preparing for construction
Projects listed on this page have completed the public process. The extra high voltage and high voltage projects also have gained approval from the Arizona Corporation Commission (ACC) to move forward with construction.
 
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altadena substation to cactus substation 69kV power line siting
voltage
estimated completion date
location
69 kV
summer 2018
North Scottsdale

​project need
Connect the Altadena Substation with the Cactus Substation. Ensure a reliable power source for the future.
contact

Kevin Duncan / 602-493-4200

project documents
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raintree substation to east end substation power line siting
voltage
estimated completion date
location
69 kV
energized August 2017
North Scottsdale
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doney park power line
voltage estimated completion date location
69 kV 2021 Flagstaff
project need
provide a new 69kV power source to serve a new substation in Doney Park


contact

Brad Larsen, 602-493-4338

related documents


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northeast valley power line
voltage estimated completion date location
69 kV 2019 Scottsdale/Phoenix
project need
new facilities to ensure reliable electric service for the rapidly growing Northeast Valley

contact
line siting: Brad Larsen, 602-493-4338
related documents


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north gila to orchard (ts-8) to yucca
voltage estimated completion date location
230 kV 2021 Yuma
project need
improve electrical capacity and reliability in the Yuma area, and may potentially accommodate the development of renewable energy projects in the region
contact

Brad Larsen, 602-493-4338

related documents
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sundance to pinal south
voltage estimated completion date location
230 kV to be determined Pinal County


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west valley north
voltage estimated completion date area
230 kV 1st circuit energized May ​2016; 2nd circuit completion tbd​ Surprise, North Buckeye
project need
increase electrical capacity and improve reliability in the area
contact

Brad Larsen, 602-493-4338

related documents
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west valley south
voltage estimated completion date location
230 kV 1st circuit ​energized May 2015; 2nd circuit completion tbd Goodyear, Waddell
project need
increase electrical capacity and improve reliability in the area
contact

Brad Larsen, 602-493-4338

related documents
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sun valley (ts-5) to morgan (ts-9) transmission line
voltage​ ​estimated completion date ​location
500 kV/230 kV ​ 2018 Northwest Phoenix
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project need
  • connect the Sun Valley Substation near Buckeye with the Morgan Substation near Peoria
  • improve reliability by completing a 500kV connection from the Palo Verde Hub to the NE Valley (Pinnacle Peak Substation)
  • increase import and export capability from the PV Hub (enough to supply power to 150,000 residences)
  • provide the infrastructure to move planned generation resources (renewable or otherwise) from their source near the Palo Verde Hub to the Metro Area
  • help relieve Transmission Congestion
project history
  • May 19, 2015 - ACC votes to approve the CEC amendments
  • August 12, 2014 – ACC votes to reopen the approved Project to review and consider the proposed amendments
  • July 17, 2014 – APS files an amendment request with the ACC to amend the approved Project
  • January 17, 2014 – Record of Decision to grant a right-of-way on BLM land for the Project
  • visit the BLM website for additional information concerning the status of the EIS
  • November 9, 2012 - the Environmental Protection Agency announced the release of the Draft EIS
  • April 11, 2011 - the Bureau of Land Management (BLM) launched an Environmental Impact Statement (EIS) process in compliance with the National Environmental Policy Act (NEPA)
  • March 17, 2009 - Certificate of Environmental Compatibility (CEC) issued by the Arizona Corporation Commission (ACC)
contact
Brad Larsen / 602-493-4338

related documents
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palo verde hub to sun valley (ts-5)
voltage
estimated completion date
location
500 kV
energized May 2016
Palo Verde to
North Buckeye
project need
provide the electrical transmission infrastructure that will bring bulk power into the North West Valley
contact

Brad Larsen, 602-493-4338

related documents
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mazatzal substation & interconnection project
voltage estimated completion date location
69 kV/345 kW 2018 Payson/Rye
project need
support growth and improve electrical capacity and reliability in the area
contact

Brad Larsen, 602-493-4338

related documents
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siting overview
Planning for the future means anticipating your electricity needs, something we’ve been doing for more than 125 years.

learn more