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SunZia Southwest Transmission Project

PERMITTING DASHBOARD PROJECT POSTING DATE: JULY 29, 2021

PROJECT WEBSITE: SunZia Project Website

All dates below are specific to the schedule of the Environmental Review and Permitting processes for this project.

In Progress

ENVIRONMENTAL REVIEW AND PERMITTING STATUS
IN PROGRESS

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ESTIMATED COMPLETION DATE OF ENVIRONMENTAL REVIEW AND PERMITTING
04/26/2023

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ENVIRONMENTAL REVIEW AND PERMITTING PROCESSES
COMPLETED

Electricity Transmission

SECTOR
Electricity Transmission

Project Category

CATEGORY
Project Category FAST-41 Covered Projects

Department of the Interior

LEAD AGENCY
Department of the Interior, Bureau of Land Management

Other Agencies with Actions or Authorizations:

Department of the Interior

Department of the Interior, Fish and Wildlife Service

Description:

The SunZia Project includes two nominal 500-kV transmission lines located on federal, state, and private lands between central New Mexico and central Arizona. The approximately 550-mile-long transmission line route originates at the planned SunZia East Substation in Torrance County, New Mexico, and terminates near the existing Saguaro substation and the existing Pinal Central Substation, both in Pinal County, Arizona. The SunZia Project is located in Socorro, Sierra, Luna, Grant, Hidalgo, and Torrance counties in New Mexico and Graham, Greenlee, Cochise, Pinal, and Pima counties in Arizona.

The SunZia Project will be constructed in two phases and ultimately include two, new, single-circuit, 500 kV transmission lines with the intent of locating both within a single 400-foot-wide right-of-way, where possible. Only one of the two 500-kV circuits will be constructed in Phase 1 and the planned in-service date for the first transmission line is 2025. The first transmission line would be a direct-current (DC) line and the second transmission line would be an alternating-current (AC) line.

Permitting Timetable

The permitting timetable below displays data as reported by agencies. Dates for Environmental Review and Permitting processes (Actions) that are in 'Paused' or 'Planned' status are subject to change and are not indicative of a project's final schedule.

  • For information about extensions, select an Action from the timetable below and select 'View Action Details' at the bottom of the page.
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Overall Project Timetable
 
STATUS
Schedule
Extension or Delay
Ahead of Schedule
Paused
No End Date
Planned

Action Information

For additional information, please select an Action from the Permitting Timetable above.

  • Action:  
  • Responsible Agency:  
  • Bureau:  
  • Action Status:  
  • SHPO:  
  • Action Identifier:  
  • Action Outcome:  
Milestone Original Target Date Current Target Date Milestone Complete