The State Underground Power Program provides for the undergrounding of distribution (or low voltage) power lines. Transmission (or high voltage) lines are not part of this program.
Western Power renew and upgrade the distribution overhead network when assets are coming to the end of their service life. Replacement of the overhead network with a new underground system is more cost effective for Western Power.
A new round of underground power projects to place existing overhead powerlines underground. Project areas are selected by Western Power and prioritised for inclusion based on those with infrastructure most in need of maintenance and upgrading being given highest priority.