The Land Transport Authority (LTA) has awarded the EUR 506.50 million (SGD780 million) civil contract for the design and construction of the 6 km tunnels at a 20 m-40 m depth below ground level between Aviation Park station and Changi East Depot under the Cross Island Line Phase 1 (CRL1) to Shanghai Tunnel Engineering Co (Singapore) Pte Ltd - LT Sambo Co Ltd (Singapore Branch) Joint Venture. The ground conditions in this area comprise thick layers of underlying soft marine clay and extensive works will have to be carried out to strengthen the soil condition to ensure that construction works proceed safely. Passenger service for the line is expected to start in 2030. Visit https://www.lta.gov.sg . 01/22.