Central Arizona Transmission System study

Phase I

You can view the report issued on Phase I of the Central Arizona Transmission System (CATS) study in PDF* format. Choose a section below:

• Executive summary (186K)
• Table of contents (69K)
• Report on Phase I (297K)
• Tables (381K)
• Appendices (463K)
• Onelines, part 1 (585K)
• Onelines, part 2 (1.2M)
• Attachments (312K)

You can also view a map of the CATS study area (1.27 MB PDF*).

Phase II

You can view the report issued on Phase II of the Central Arizona Transmission System (CATS) study in PDF* format. Choose a section below:

Volume 1

• Title and Table of Contents (126K)
• Report summary (614K)
• CATS Phase II study results (317K)
• Tables (227K)
• Appendices (754K)

Volume 2

• Title and Table of Contents (126K)
• APS one-lines (302K)
• SRP one-lines (1.39MB)
• TEP one-lines (2.35MB)
• PNM one-lines (1.01MB)
• Attachments (154K)

Phase III

You can view the report issued on Phase III of the Central Arizona Transmission System (CATS) study in PDF* format:

View the Phase III report in its entirety (2.3 MB).

• Title (66K)
• Introduction (131K)
• Table of contents (117MB)
• Report summary (1.7MB)
• Phase III study results (555K)
• Appendices (448K)
• Attachments (200K)

To receive information about this study, or if you are interested in becoming a CATS participant, please complete and submit the online request for information form.

Regional transmission studies

California-Arizona Regional Transmission Study (CARTS)

For information about related regional transmission studies, visit the California-Arizona Regional Transmission Study from the California ISO Web site.

Contact us

If you have questions or comments about the CATS project, please contact us.

E-mail: Send questions to cats@azpower.org.

Telephone: (602) 236-0974

Information request form: To receive information about the CATS study, please complete and submit the online request for information form.

Request to participate: If you are interested in becoming a CATS participant, please submit the online request for information form.

*To view PDF files, you'll need Adobe Acrobat Reader if you don't have it. It is free and you will only need to download it once. Then, return to this page to view the report sections and maps.