The Land Transport Authority (LTA) has awarded the first civil contract for the Downtown Line 2 extension (DTL2e). This contract is for the design and construction of tunnels between DE1 station and DE2 interchange station on DTL2e and has been awarded to a joint venture between Woh Hup Engineering Pte Ltd and Underground Technology Engineering Construction Pte Ltd. The contract, valued at around $326 million includes the construction of two mainline tunnels and a tunnel connection to Gali Batu Depot, along with associated additions and alterations works within the depot.
2 Woh Hup Engineering Pte Ltd is a Singapore-registered construction company specialising in infrastructure and building projects and is currently involved in the design and construction of Punggol Interchange station and tunnels for Cross Island Line-Punggol Extension (CPe) as well as Loyang station and tunnels for Cross Island Line Phase 1 (CRL1). Underground Technology Engineering Construction Pte Ltd which is also experienced in tunnelling works, is currently involved in the construction of tunnels between CR2 Aviation Park station and the Changi East Depot for CRL1.
Engineering Highlights
3 Three bored tunnels under this contract, each approximately 1 kilometre long and reaching depths of up to 21 metres, will be designed and constructed beneath Sungei Kadut Avenue, Sungei Kadut Way, and Woodlands Road. These tunnels will be built close to the North-South Line (NSL) and existing infrastructure such as Sungei Pang Sua and Pang Sua Canal. Additionally, a cut and cover tunnel will be built at Gali Batu Depot as part of a new Reception Track.
4 Real-time monitoring and safety measures will be implemented during the tunnelling works. LTA and the contractor will implement necessary mitigation measures to ensure ground stability and safe construction, and minimise impact to nearby stakeholders and infrastructure. LTA had also carried out a comprehensive Environmental Impact Assessment and will implement all the necessary mitigation measures outlined in the Environmental Monitoring and Management Plan. LTA and the contractor will also continue to engage the various stakeholders including nature groups during the construction works.
5 Construction works are expected to start by the second quarter of 2026 and passenger service for DTL2e is targeted to commence in 2035. During the construction, LTA and its appointed contractor will maintain regular contact with residents and stakeholders, and provide regular updates on the progress of the works via circulars, flyers, newsletters, face-to-face engagement, social media and community activities.
About DTL2e
6 DTL2e comprises three stations, the first station (DE1) after Bukit Panjang station will be an underground station located along Sungei Kadut Avenue. The new terminus for the DTL will be an underground interchange station (DE2) connected to a new aboveground station (NS6) between Yew Tee and Kranji stations on the NSL. When completed, DTL2e will enhance rail connectivity in the north-western region, and will shorten travel times for commuters travelling to and from the north and north-western parts of Singapore. It will provide improved access to existing and new growth areas such as Yew Tee and the future Sungei Kadut Eco-District, as well as amenities such as the Rail Corridor and Pang Sua Park Connector.
Enclosed:
Annex A – System map of Downtown Line
Annex B – Location Map
