Pylon CY288, located in the Heathcote Valley, was hit by boulders during the September 2010 earthquake in Christchurch. This pylon forms part of the main power-line route over the Port Hills providing electricity into Sumner area. It was therefore essential for the pylon to be protected from any future rockfall events to ensure continuity of electricity supply. The pylon is situated on sloping terrain approximately 75m above sea level. Outcrops of volcanic rocks from the Lyttelton Volcanic Group are located approximately 180m upslope from the pylon. Following on from the earthquake, the client engaged a consultant to carry out a rockfall risk assessment to identify rockfall sources in the upslope region and suggest ways to protect Pylon CY288 from rockfall impacts.