This project involves the relocation of a 3.2km section of an existing 330kV single circuit transmission line. Transmission line 39 is a 330 kilovolt (kV), single circuit overhead connection that extends 114 kilometres between the Sydney West and Bannaby substations.
An approximate 3.2 kilometre section of Transmission Line 39 crosses Commonwealth land that is the designated site for the Western Sydney Airport (the airport site). The project involves the construction of a proposed 3.8 kilometre underground cable that generally follows the perimeter of the airport site.
Following construction of the new underground cable, the existing 3.2 kilometre section of overhead transmission line that crosses Commonwealth land will be demolished.