Contract CR102 consists of the design and construction of tunnels connecting Aviation Park station to Changi East Depot for Cross Island Line (CRL). STEC undertakes the contract in a joint venture with LT Sambo.

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The project includes five bored tunnels, seven connecting passages as well as two sections of open-cut tunnels and a supporting building. The tunnels, constructed by four Earth Pressure Balance (EPB) shield machines, will pass through temporary aircraft taxiways, aviation park roads, canals, drainage pipes and other public infrastructures.

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Contract CR102 is valued at S$780 million. It is a part of the future 50-km Cross Island Line which will be the longest fully underground rail line in Singapore.