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Relocation of Sha Tin Sewage Treatment Works to Caverns

***The proposed mitigation measures under Feasibility Study Stage had been updated***

Through mitigation measures to reduce impact to nearby road network

Construction Stage
The feasibility study consultant completed the preliminary assessment on traffic impact of the relocation project to the nearby road network, in particular A Kung Kok Street. Since A Kung Kok Street is a main route for many buses and mini-buses to/from Ma On Shan area, the feasibility study consultant recommended the following mitigation measures to minimise the additional loading on this road due to construction traffic:
  • Two temporary traffic management schemes (refer to figures below) should be further studied in the design stage, including construction of temporary roads to enable the construction vehicles to enter/exit the cavern site directly from/to the high speed road (Ma On Shan Road) so as to minimise the use of A Kung Kok Street;
  • Restricting construction vehicles passing through A Kung Kok Street during morning peak hours through site management.
Based on the traffic modelling results, the feasibility study consultant anticipated that the traffic impact of the additional construction vehicles to the nearby area will be very minimal if the recommended measures are implemented.

 Scheme 1 Construct a temporary road to connect the cavern portal and the southbound of Ma On Shan Road, allowing the construction vehicles enter/exit the cavern site through Ma On Shan Road directly. The existing Mui Tsz Lam Road/A Kung Kok Street junction will be suitably modified.  

 Scheme 2 Use part of the existing Customs and Excise Department’s vehicle detention area to construct a temporary road connecting the cavern portal to the northbound of Ma On Shan Road. This scheme will require temporary closure of the cycle track and footpath underneath the bridges of Ma On Shan Road and Ma On Shan Line. Cyclists and pedestrians will be diverted to use the cycle track/footpath on the opposite side of the nullah. 

Operation Stage
At present, there are about 20 vehicles per day taking sludge away from the existing STSTW. Although the incoming sewage will increase progressively in future, we will adopt advanced treatment technology to maintain the sludge production and hence the traffic volume of sludge carrying vehicles at a similar level. Therefore, the operation of the relocated STSTW will not cause any adverse traffic impact to the nearby road network.

In the investigation and design stage, we will conduct Traffic Impact Assessment (Investigation and Design Stage) to ensure the compliance with the relevant requirements.

***The proposed mitigation measures under Feasibility Study Stage had been updated***

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