NATIONAL GRID YARD
means the area located within 10m of either side of the centreline of an above ground transmission cable, or a transmission line on single poles, that in either case is up to and including 110kV; the area located within 10m of either side of the centreline of the Te Hikowhenua - Deviation A (THW-DEV-A) - Single Circuit transmission line on towers and Pi poles; the area located within 12m either side of the centreline of an above ground transmission line on pi-poles or towers other than the Te Hikowhenua - Deviation A (THW-DEV-A) -Single Circuit transmission line; the area located within 12m in any direction from the outer visible edge of an electricity transmission support structure. The measurement of setback distances from National Grid transmission lines must be undertaken from the centre line of the National Grid transmission line and the outer edge of any support structure. The centre line at any point is a straight line between the centre points of the two support structures at each end of the span. Note: the National Grid Yard does not apply to underground cables or any transmission lines (or sections of line) that are designated.