This project involved engineering design for reorientation of an existing 220 kV double circuit transmission line corridor. The scope included detailed surveys across approximately 2 kilometres of mangrove terrain, foundation engineering for creek crossings and structural design of transmission towers to suit constrained and environmentally sensitive conditions.

The assignment covered design of 5 new 220 kV double circuit towers and pile foundation design for 2 creek crossing locations. Delta configuration was adopted to optimise conductor spacing and reduce overall tower height. The maximum tower height was limited to 48.5 metres, which is 7.1 metres lower than conventional designs for similar voltage levels.

The design also focused on reducing the number of unique tower types by ensuring compatibility across locations, thereby simplifying fabrication, logistics and erection activities while maintaining structural safety.

TCE's Scope