New line replaces twin timber poles with single concrete poles

Rocla is supplying spun concrete power poles for the rebuilding of a vital electrical power link on the NSW Mid-North Coast.

TransGrid, operator of the NSW high voltage transmission system, is rebuilding the existing 132kV transmission line from Kempsey to Port Macquarie to increase the capacity of the electricity supply to Port Macquarie.

The Mid-North Coast region is one of the fastest growing regions in New South Wales, with forecasts indicating that population is likely to continue to grow in the medium to long term.

The existing single circuit line is being rebuilt as two circuits. Twin timber poles are being replaced by single pre-stressed spun concrete poles, providing a more compact line. Constructing the new double circuit line within the easement of the existing line will also minimise environmental impact.

Rocla is supplying some 254 concrete poles for the 44km line. The poles, manufactured to TransGrid standards, are being supplied as single and two-piece poles, 20 to 30m in height, with ultimate loads up to 60kN.

The line, which is being built by PowerServe, is expected to be completed by late 2010.