The Circle Line Stage I C825 project is a design and build project which STECS undertook in a joint venture with Woh Hup and NCC. This project includes construction of Promenade, Esplanade, Bras Basah and Dhoby Ghaut Station, 3.2km TBM Tunnels, 0.6km C&C tunnel and 110m overrun tunnel using SCL method. Two 6.35m diameter mix face EPB machines were used to construct the bored tunnels. The project is situated in the heart of urban Singapore close to buildings such as Raffles Hotel, Chijmes, Singapore Arts Museum (SAM), as well as existing MRT station and tunnels.