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 across its entire length 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 several cooperating agencies, is leading the effort to comply with the National Environmental Policy Act (NEPA).   

On June 14, 2013 the BLM released the SunZia Final Environmental Impact Statement and Proposed Resource Management Plan Amendments. 

SunZia is anticipated to be in-service by 2018.        


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 along SunZia’s alignment and 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 wage income in addition to revenues for state and local governments through property, state and local taxes paid by the SunZia Project and generation projects that may utilize SunZia’s new transmission capacity. An Economic Impact Assessment was prepared by the University of Arizona and New Mexico State University.


Use the following links to learn more about:

icon16Environmental Impact Statements and the National Environmental Policy Act

icon16Bureau of Land Management and the SunZia Project

icon16Department of Interior and Electric Transmission Facilities & Energy Corridors

Heinrich Announces Key Development To Reach Common Ground On SunZia Southwest Transmission Line

November 15, 2013

Department of Defense Under Secretary Frank Kendall has agreed to utilize M.I.T Lincoln Laboratory to evaluate the concerns raised by White Sands Missile Range in New Mexico.  The lab will explore opportunities to make changes to White Sand's testing operations that will allow these missions to continue with the presence of the SunZia Project.

Link to Senator Martin Heinrich's website to view the entire Press Release

First Wind Signs an Agreement with SunZia

September 6, 2013

First Wind Energy, LLC is moving forward as SunZia Transmission, LLC’s first anchor tenant by signing a Letter of Intent.  The agreement reserves up to 1,500 megawatts of SunZia’s transmission capacity for First Wind’s proposed high-capacity wind energy project located in New Mexico.  View the Press Release. 


SunZia Study Area Map

Economic Impact