SunZia SunZia
Welcome To SunZia

The SunZia Project consists of two bi-directional extra-high voltage electric transmission lines and substations that will transport energy from Arizona and New Mexico to customers and markets across the Desert Southwest.  SunZia’s total transmission capacity has an approved rating from the Western Electricity Coordinating Council of 3,000 megawatts for two single-circuit 500 kV AC lines.  SunZia is solely an electric transmission project, and is not a power generation facility.  Click here for a more detailed description of the project.

The Bureau of Land Management (BLM), along with fourteen cooperating agencies, led the effort to comply with the National Environmental Policy Act (NEPA).   

On January 23, 2015, the BLM issued a Record of Decision (ROD) that approved SunZia’s application for a right-of-way across federally owned property.  The ROD concluded the six and half year effort to comply with NEPA.

SunZia is anticipated to be in-service by 2020.


Benefits of the SunZia Southwest Transmission Project:

icon2Provides an option to develop power generation resources, including renewable resources, located in Arizona and New Mexico that currently do not have nearby access to transmission service; and

icon2Delivers these generation resources to customers in western markets; and

icon2Increases reliability of the existing extra-high voltage transmission system in southern Arizona and southern New Mexico; and

icon2Greatly improves power transfer across the Desert Southwest electricity grid; and

icon2Generates jobs and revenues for state and local governments through property, state and local taxes paid by the SunZia Project and generation projects that will utilize SunZia’s new transmission capacity. Estimates on these economic benefits are found here.

SunZia Funds Wildlife & Natural Resource Efforts

January 24, 2018

SunZia representatives joined officials from Arizona’s Game & Fish Department (AGFD) and Pinal County to present a check for $300,000 to be used to help fund watering stations for wildlife in remote areas of southeast Arizona.

The funds from SunZia are part of a broad joint conservation effort by SunZia and AGFD to help enhance wildlife habitat in southeastern Arizona.  The effort was the result of a comprehensive wildlife preservation agreement executed by the parties in January 2016.

For a copy of the comprehensive agreement click here.

SunZia Study Area Map

Economic Impact