It comprises a storage yard with a capacity of 53 trains and has an area of 300,000 m². The depot also houses a central maintenance with train overhaul facilities for trains on the North South Line and East West Line. It is also a school for newly recruited staff to train them in their assigned job. It is where the faregate operation department is located. The rolling stock workshop and Tracks 10–12 are the locations where various programmes such as refurbishment of C151 (2006 - 2008 and 2010 - 2013) and trains that will be fitted with new signaling system takes place (currently 027/028, 093/094 and 345/346 are missing).
The depot was completed in 1987 by American architect Vikas M. Gore and the 12,000 square metres maintenance area at cost of S$300 million.
SMRT Cram Jam!
On 11 February 2007, SMRT Organized the SMRT Cram Jam! cum Learning Journey and Charity Bazaar to raise funds for the SMRT Silver Tribute Fund. The Cram Jam took place in the morning seeking an entry into the Singapore Book of Records by cramming people inside a standard Kawasaki C151 Car (Car used: 2027), a Mercedes O405G Hispano Habit Bus (Bus Registered TIB1202K) and a Ssangyong Rodius/Stavic MPV Cab. The Singapore Police Force crammed 550 officers inside the train car, 235 staff from SMRT crammed inside the bus and an amazing 44 Girl Guides Singapore Cadets crammed themselves into the cab. Games and Carnival Food were organised and a 90-minute tour around the Bishan Depot.
An MRT train (in this case, C751B 311/312) has been vandalised in an apparent security breach at a depot on 17 August 2011. The train was then put into service before the vandalism was discovered.
LTA said that SMRT failed to detect, in a timely manner, the security breach at its Bishan MRT depot and the graffiti on one of its MRT trains (C751B 311/312) on 17 August 2011 and the transport company was fined S$200,000 for the security breach.
An MRT train is also vandalised, but the train number is 531/532 on 5 May 2014. Police report has been made in the wee hours of the early morning when trains dispatches from depot.
On 7 March 2012, Minister for Transport, Mr Lui Tuck Yew, announced on Committee of Supply Debate 2012 in Parliament of Singapore that upgrading of existing NSL and EWL (NSEWL) depots to be started and completed by 2014.