CONSTRUCTION ON Hong Kong's delayed strategic sewage system is to restart following the award of the second package of tunnelling works.
A joint venture of Kvaerner Cementation and its Hong Kong sister company Gammon Con- struction won the contract to build what are believed to be the two deepest tunnels in Hong Kong.
The HK$600M (£48M) contract awarded by the Hong Kong Drainage Services Department is to build the tunnels through hard granite 143m below sea level. The segmentally lined structures will carry sewage from north east Hong Kong Island and Kowloon to treatment works at Stonecutters Island. Two hard rock tunnel boring machines will be used to excavate the 3.5km long, 3.3m diameter tunnel from Kwun Tong to Kwa Wan and the 5.5km long, 4.3m diameter tunnel from To Kwa Wan to Stonecutters Island. Both are expected to be finished in two years time.
Originally due to finish in May 1997, work has been delayed since the middle of 1996, when the original joint venture contractor, Campenon Bernard/Maeda halted construction, claiming that high water was threatening safety.