Transmission Line Project
The Chimney Canyon Solar and Transmission Line Project aims to enhance grid reliability across Navajo County and Arizona by interconnecting a proposed solar generating facility to key transmission infrastructure.
Transmission Line Project Characteristics
Up to two routes to be developed
Routes are anticipated to be up to10 miles in length with a right-of-way of at least 150 feet
Pole structures are anticipated to be monopole design, up to 200-ft in height, and spaced approximately 800 - 1,000-feet apart
Multiple potential transmission routes are under analysis
Project Timeline
- Certificate of Environmental Compatibility application filed in October 2025.
- Arizona Transmission Line Siting Committee Public Hearing completed December 15 – 17, 2025.
- Construction anticipated to begin as early as Q1 2027.
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Public Involvement
Arizona Power Plant & Transmission Line Siting Committee Public Hearing
A Public Hearing was held before the Arizona Power Plant and Transmission Line Siting Committee in mid-December 2025.
For the official notice of hearing and schedule updates please visit the Arizona Corporation Commission website.
Submitting comments
Clearway is accepting public comments through the below channels.
- Send us an email at ChimneyCanyonSolar@clearwayenergy.com
- Call or leave a message at 480-424-1660
- Send a letter to "ATTN: Chimney Canyon Project, 4900 N Scottsdale Rd. Suite 5000, Scottsdale, AZ 85251"
- Use the form at the bottom of this webage
Project Materials
Additional materials will be posted here as they become available.
- Certificate of Environmental Compatibility 255-A
- Certificate of Environmental Compatibility 255-B
- Transmission project map and route comparison PDF
- Arizona Power Plant and Transmission Line Siting Committee hearing conference transcription, 12/15/2025
- Arizona Power Plant and Transmission Line Siting Committee hearing conference transcription, 12/16/2025
- Arizona Power Plant and Transmission Line Siting Committee hearing conference transcription, 12/17/2025
- Application for Certificate of Environmental Compatibility Chimney Canyon Gen-Tie Line Project
- Application for Certificate of Environmental Compatibility Chimney Canyon Gen-Tie Line Project
- Arizona Power Plant and Transmission Line Siting Committee Notice of Public Hearing
- Arizona Power Plant and Transmission Line Siting Committee Notice of Public Hearing - Exhibit A
- Arizona Power Plant and Transmission Line Siting Committee Notice of Public Hearing - Exhibit A
- CEC 255 Agenda
- CEC 255 Procedural Order
- Arizona Power Plant and Transmission Line Siting Committee pre-hearing conference full transcription
- Arizona Power Plant and Transmission Line Siting Committee pre-filing conference full transcription
- Arizona Power Plant and Transmission Line Siting Committee pre-filing conference exhibit 1
- Arizona Power Plant and Transmission Line Siting Committee pre-filing conference exhibit 2
Get in Touch
The Clearway team wants to hear from you. Please fill out this form or email chimneycanyonsolar@clearwayenergy.com to get in touch.
