SunZia is a 515-mile, 500kV independent transmission project that will connect high-quality wind and solar resources in New Mexico and southern Arizona with markets in the West. The Project comprises two single-circuit 500kV alternating-current transmission lines and a number of substations, with an east to west rating of 3,000 MW. Development of the Project commenced in 2006 and construction of the first line is expected to commence by the middle of 2018 with commercial operation planned for late 2020.