09 Jan 2017 / Hong Kong
With immediate effect and for a period of approximately 3 months, marine works will be carried out at the North of the Hong Kong International Airport. The scope of the works involve marine site investigation, deep cement mixing works, drilling of boreholes, laying of sand blankets, water monitoring, hydrographic survey and diving operations The work area will be bounded by straight lines joining the following co-ordinates (WGS 84 Datum) from (A) to (P) and the adjacent shoreline:
(A) 22° 18.438’N / 113° 53.766’E
(B) 22° 18.354’N / 113° 53.209’E
(C) 22° 18.646’N / 113° 53.100’E
(D) 22° 19.022’N / 113° 53.594’E
(E) 22° 18.685’N / 113° 52.549’E
(F) 22° 19.028’N / 113° 52.421’E
(G) 22° 19.371’N / 113° 52.294’E
(H) 22° 19.542’N / 113° 52.826’E
(I) 22° 19.714’N / 113° 53.359’E
(J) 22° 19.886’N / 113° 53.891’E
(K) 22° 20.102’N / 113° 54.563’E
(L) 22° 20.229’N / 113° 54.956’E
(M) 22° 20.195’N / 113° 55.565’E
(N) 22° 19.848’N / 113° 55.694’E
(O) 22° 19.653’N / 113° 56.368’E
(P) 22° 19.334’N / 113° 56.487’E
Yellow marker buoys fitted with yellow flashing lights and radar reflectors will be laid at co-ordinates from (E) to (N) to mark the boundary of the works area.
The works will be carried out by a flotilla of vessels including drilling barges, derrick lighters, flat top barges, jack-up platforms and survey boats at various stages. Some tugboats, guard boats and self-propelled delivery barges will provide assistance. The number and type of vessels engaged in the works will change from time to time to suit operational requirements.
A working area of approximately 150 metres will be established around each drilling barge. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the positions of the anchors extending from the drilling barges.
A working area of approximately 50 metres will be established around each derrick lighter and flat top barge. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the positions of the anchors extending from the derrick lighters and flat top barges.
A working area of approximately 25 metres will be established around each jack-up platform. Yellow flashing lights will be installed at the four corners of the platforms to indicate the positions of the platforms.
To facilitate the drilling works, sand blankets will be temporarily laid within the works area. The water depth at the areas where sand blankets are laid will be temporarily reduced by about 2.0 metres. Yellow marker buoys fitted with yellow flashing lights will be laid to mark the boundaries of such areas.
To safeguard the deep cement mixing works and ensure navigational safety, guard boats will station in the works area and patrol the waters in the vicinity to give necessary guidance to the vessels approaching the works area.
Works will be carried out round-the-clock. Diving operations will be carried out from time to time during the hours of work.
Vessels engaged in the operations will display signals as prescribed in international and local regulations. Vessels navigating the vicinity are advised to proceed with caution.
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