Contract No. . DC/2007/23
Construction of Sewage Conveyance System from North Point to Stonecutters Island

Scope of Works

(1) Construction of sewage conveyance system from North Point Preliminary Treatment Works to Stonecutters Island Sewage Treatment Works via Wan Chai East Preliminary Treatment Works, Central Preliminary Treatment Works and Sai Ying Pun junction shaft.
(2) Construction of drop shafts, riser shafts and junction shafts at North Point Preliminary Treatment Works, Wan Chai East Preliminary Treatment Works, Central Preliminary Treatment Works, Sai Ying Pun and Stonecutters Island Sewage Treatment Works.
(3) Construction of temporary production shafts at North Point, Wan Chai East and Stonecutters Island to provide access for the construction of the sewage conveyance system.
(4) Construction of connection channels, pipes, chambers and tunnel connecting the proposed drop shafts/riser shafts to the facilities of the preliminary treatment works / sewage treatment works.

Project Highlights

Total Length of Tunnel: 12 km
Size of completed Sewer : oval shape of 1.7 - 5.6 m² and 3m dia.
Depth below Sea Level:140 - 160 m
Quantity of Material Excavated :424,000 m³
Population Served on Commissioning : about 800,000

Contract Particulars

Contract Commencement : 7/31/2009 12:00:00 AM
Completion Date : 17/06/2015
Contract Sum : around HK$4,048 million
Government Department : Drainage Services Department
Consultant : AECOM Asia Company Limited
Contractor : Gammon Construction Limited

Progress Photos