Milestones Timeline – 渠務署 Drainage Services Department – 淨港揚清給維港的信 Fragrant Again Letters to Victoria Harbour

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1989 - Formulation of the Strategic Sewage Disposal Scheme

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1994 - Commencement of works on Harbour Area Treatment Scheme (HATS) Stage 1

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1997 - Commissioning of chemically enhanced primary treatment works at Stonecutters Island, as part of HATS

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2001 - Full commissioning of HATS Stage 1

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2004 - Public consultation on the way forward for HATS conducted

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2009 - Commencement of works on HATS Stage 2A

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2011 - Cross Harbour Race returned in Victoria Harbour

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2012 -14 - Seven Tsuen Wan beaches reopened

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2014 - Breakthrough of deep tunnel system

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2015 - Full commissioning of HATS Stage 2A, Maiden Voyage for Clean Harbour 1 and Clean Harbour 2

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2016-18 - Numerous national and international awards won for the HATS project