Singapore’s Land Transport Authority (LTA) has awarded two civil contracts for the Downtown Line 2 extension (DTL2e) at a combined contract value of around S$735 million.
The first contract, for the design and construction of an underground station (DE1) located along Sungei Kadut Avenue, was awarded to Woh Hup Engineering Pte Ltd. Valued at around S$285 million, this contract includes building a vehicular bridge to extend Choa Chu Kang North 7 and a pedestrian link-bridge over Pang Sua Canal to enhance connectivity between Yew Tee, DE1 station and the Rail Corridor.
Woh Hup Engineering is a major contractor based in Singapore, which specialises in infrastructure and building projects. It is currently working on the design and construction of Punggol Interchange station for the Cross Island Line (CRL) Punggol Extension (CPe), and CR3 station for CRL Phase 1. The company was also awarded the contract for tunnelling works between DE1 station and DE2 interchange station for the DTL2e project.
The second contract, for the design and construction of the NS6/DE2 interchange station, was awarded to a joint venture between Samwoh Corporation Pte Ltd and China Communications Construction Company Ltd (Singapore Branch). Valued at around S$450 million, this contract is to build an underground DE2 station on the DTL and a connected aboveground NS6 station between the Yew Tee and Kranji stations on the North-South Line (NSL).
Based in Singapore, Samwoh Corporation is an established contractor that provides civil engineering and construction services. Its completed projects include the Sentosa Gateway Tunnel, and the flyover slip road from Seletar West Link to Seletar Expressway (SLE). The company is currently involved in the enhancement of a section of Loyang Avenue, Telok Paku Road, Nicoll Drive and Changi Coast Road at the Changi Northern Corridor, as well as the enhancement of road networks at the Pan Island Expressway (PIE), East Coast Parkway (ECP) and Changi Flyover at the Changi Southern Corridor.
China Communications Construction has an extensive track record in delivering design-and-build construction services both locally and abroad. It is currently involved in the construction of CR6 Tampines North station, CR15 King Albert Park and CR17 Clementi interchange stations on the CRL, JS8 Boon Lay interchange station on the Jurong Region Line (JRL), and the Johor Bahru – Singapore Rapid Transit System (RTS) Link viaduct and tunnels. The contractor is also working on the construction of the Jurong East Integrated Transport Hub.
Complex ground condition
Located along Sungei Kadut Avenue and Sungei Kadut Central respectively, the DE1 and NS6/DE2 stations will be built concurrently using earth retaining and stabilising structures (ERSS), according to LTA. This is due to expected complex ground conditions in the area, such as hard granite. The works will be carried out within a constrained workspace and in close proximity to the NSL.
LTA and the contractors will implement real-time monitoring of ground stability and relevant safety measures to ensure the safe conduct of construction works and minimise impact to nearby stakeholders and infrastructure. LTA has also performed a comprehensive Environmental Impact Assessment and will implement all the necessary mitigation measures as outlined in the Environmental Monitoring and Management Plan.
Construction works for the DE1 and NS6/DE2 stations are expected to start in the second quarter of 2026, with passenger service for DTL2e scheduled to commence in 2035.
All images: LTA
