Kim Chuan Depot (Chinese: 金泉车厂) is a rail depot for the Mass Rapid Transit system in Singapore. The depot cost S$297 million to construct and houses the trains for the Circle Line and Downtown Line. The depot is fully underground, reaching a depth of 24 m at some points. It provides stabling of the trains, maintenance and operational control of the line. The depot has a capacity for 77 trains and has an area of 100,000 m². The depot is located along Upper Paya Lebar Road and 2.1 million cubic metres of soil had to be excavated for its construction. An administration building with offices, a warehouse, a canteen and a 66 kilovolt substation is located above the depot.