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The St Helena Tunnel is a twin-tube road tunnel under St Helena Hill located near the suburb of Ewingsdale, near Byron Bay, New South Wales, Australia. The tunnel is part of the Tintenbar to Ewingsdale project on the Pacific Highway and is located on a new alignment. The tunnel is being built to avoid the steep grades of St Helena Hill and associated heavy truck noise and pollution. It is be approximately long and 45 m below the 131 metre high ridge line. The tunnel will comprise two road tunnels, one southbound and one northbound, each with two traffic lanes. The cost of the project is $862 million and is jointly funded by the state and Federal governments. It is expected to be completed in December 2015 (weather permitting). ==Milestones== * January 2010 - Planning approval and construction funding for the Tintenbar to Ewingsdale project including the St Helena Tunnel. * May 2010 - The RMS called registrations of interest for the construction of the upgrade * December 2010, three companies were invited to submit detailed tenders * August 2011, the contract was awarded to Lend Lease (previously Baulderstone). *24 January 2014 - Excavator breaks through on the northbound tunnel 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「St Helena Tunnel」の詳細全文を読む スポンサード リンク
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