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Trafalgar House (Tunnelling) has an estimated £8 million contract to design and build an undersea tunnel for South West Water's £60 million Penzance and St Ives sewage treatment scheme in Cornwall.The 2.6 km rock tunnel will run from Gwithian on the north Cornish coast to St Ives bay.The contract also calls for four diffusers at the seaward end of the tunnel.Treated wastewater will reach the tunnel outfall through a new 8 km pipe between Hayle and Gwithian.Work on sinking ...

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