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One of the projects largest tip sites was contoured and progressively grassed. The largest cut on the alignment is just before Perry Road with a 70m high rock face - 1.2 million cubic metres was removed from the cut. A total of 800,000 cubic metres of this was used as fill. Environmental management has been an integral part of the Ara Tūhono – Pūhoi to Warkworth motorway project from the start. The 18.5km route over steep hills and flat country, much of it unstable, is estimated to have produced up to 10 million cubic metres* of cut material including rock and soil, which was moved by a combin...
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