RELOCATION OF DIAMOND HILL FRESH WATER AND SALT WATER SERVICE RESERVOIRS TO CAVERNS

Contract No.	21/WSD/21
Contract Title	Relocation of Diamond Hill Fresh Water and Salt Water Service Reservoirs to Caverns
Awarded Contract Sum	HK$ 2,105.2M
Works Commencement Date	9 December 2022
Esimtated Works Completion Date	Second half of 2027
Client	Water Supplies Department
Supervising Office	Binnies Hong Kong Limited
Contractor	Chun Wo – Sinohydro JV
Scope of Work	(1) Construction of a caverns complex inside the mountain body at the south of Lion Rock of about 1.1 hectares in total area and about 156000 cubic metres (m3) in total volume for accommodating the relocated Diamond Hill Fresh Water and Salt Water Service Reservoirs (DHSRs) and associated facilities; (2) site formation works at the access tunnel portal area near Ma Chai Hang Pumping Station, and construction of an access tunnel of about 780 metres (m) long to connect the caverns complex; (3) construction of the relocated Diamond Hill Fresh Water and Salt Water Service Reservoirs (DHSRs) and the associated facilities (including two pumping stations) in caverns; (4) installation of ventilation facilities and other associated electrical and mechanical (E&M) facilities in caverns and access tunnel, and at the access tunnel portal area; (5) laying of fresh water and salt water pumping and distribution mains of about 13 kilometres (km) in total length with diameters ranging from 250 millimetres (mm) to 800 mm in caverns, access tunnel and Wong Tai Sin district for connection with the existing water supply network; (6) carrying out other related works including utilities diversion, landscaping works, etc.; and (7) implementation of environmental mitigation measures and related environmental monitoring and audit (EM&A) programme for the works.