With rapid growth and urbanisation of Singapore's economy and society, demand for power supply has increased over the years and there is a need to build a more sustainable solution to the ongoing upgrading and renewal of our grid infrastructure.

The cable tunnels will:

  • Sustain the reliability and security of electricity networks in Singapore

With the implementation of this infrastructure, the reliability and security of the existing electricity network that we have all come to depend on in Singapore will be enhanced as the cable tunnels provide a higher level of control over the management of the cables.

  • Meet cable replacement requirements and future demands

The cable tunnels will ensure that Singapore is equipped with the right power supply infrastructure for the future and can rise to cope with the anticipated increasing demand for electricity. They will not only have the space and conditions to meet future increases in the demand for electricity, but will also make the replacement of the current cables much more efficient.

  • Enable efficient maintenance of cables, transmission and distribution of electricity

The safe, secured and controlled cable corridor of the tunnels provides certainties for convenient cable installation and replacement. With quick and easy access to the cables via the tunnels, maintenance is also more secure and efficient.

  • Minimise congestion of underground utility services

The tunnels will be built at a depth of 60 metres below ground, deeper than the existing utility services which are constructed between 10 to 50 metres underground. The depth of our tunnels demonstrates our efforts in minimising congestion of underground utility services.

  • Minimise inconvenience to the public

As the traditional method of cable installation and replacement is done by directly burying the cables underneath major roads, construction works to bury these cables require major roads to be partially closed. However, with the construction of the cable tunnels, cable installation and replacement can be easily done with minimal inconvenience to the public.


Using the conventional method, transmission cables are installed through direct burial under the road surface. When the cables need to be repaired, partial road closure is required thereby affecting on-going traffic. With the underground cable tunnels, repair and maintenance work can be carried out without disturbing road users.