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 Receives Order from FERC

September 20, 2017

The Federal Energy Regulatory Commission (“FERC”) granted SunZia’s request to modify its authority to charge negotiated rates for transmission capacity on the SunZia Southwest Transmission Project.  The FERC broadened SunZia’s negotiated rate authority to allow SunZia to enter into anchor customer arrangements for up to 100% of the Project’s transmission capacity.

The FERC also accepted SunZia’s report on its open solicitation process and selection of Pattern Energy Group LP (“Pattern”) as an anchor customer for 1,500 MW of transmission of the first phase of the Project.  Pattern is developing a number of utility scale wind projects in central New Mexico near the SunZia East substation.  FERC’s recent approval allows SunZia to subscribe sufficient transmission capacity with Pattern to enable delivery of the power from that wind generation across the Desert Southwest. 

The FERC order can be accessed at the FERC website using the following link:   

SunZia Study Area Map

Economic Impact