North–South Line (1987) Bishan station, then known as Kampong San Teng after a
Cantonese and
Hakka kampong that once occupied the area, was among the first stations planned for inclusion in the MRT network. The station was renamed San Teng in November 1982, dropping
kampong, Contract 103 for the construction of San Teng MRT station and of tunnels between San Teng and
Braddell stations was awarded to a Belgian–Singaporean
joint venture Hytech, Franki and Compagnie Francois d'Enterprises in December 1983 at a contract sum of . This was the first contract involving a
cut and cover construction method which the MRT Corporation (MRTC) awarded. On 21 September 1984, the MRTC renamed San Teng to Bishan station to reflect the name of the new
public housing estate that was being built around the station's site. Structural works for Bishan station was completed on 23 October 1985. In January 1986, it was announced the station would be opened in early 1988 as part of the first section of the MRT system from
Yio Chu Kang to Toa Payoh. In September 1987, it was announced the section would open on 7 November that year. To familiarise people with the system, the station opened for a preview from 24 to 25 October. As announced, Bishan was one of the first MRT stations on the network to be opened for service on 7 November 1987.
Circle MRT line and further upgrades (2008–09) In July 2003, Contract C825A for the design, construction and completion of Bishan interchange station was awarded to Econ Corporation Ltd and Eng Lim Construction Co Pte Ltd Joint Venture at a sum of . The contract also included the upgrading of the NSL station. Construction was due to start in the third quarter of 2003 and was expected to be completed by early 2008. The original NSL station underwent major alterations to enable it to accommodate increased passenger traffic when the CCL station opened. An air-conditioned platform to serve southbound trains was constructed to increase the station's passenger capacity from 1,250 to 2,020. The new platform, Platform B, opened for service on 27 July 2008. Because Platform A, the original platform, was now serving northbound trains to Jurong East and remained in service, upgrading works for Platform A were hindered and took about a year to complete. While the platform was re-tiled during the day,
platform screen doors (PSDs) were installed in sections through the night. An air-conditioning system was also installed as part of the upgrade. Upgrading work for the platform was completed on 23 May 2009. An additional entrance to the basement of Junction 8 was also built. Along with the other Stage 3 CCL stations, Bishan CCL station was opened on 28th of that month. Due to the close proximity of a nearby tunnel portal to residential apartment blocks, the installation of -tall barriers stretching started in September 2011 and was completed by the second quarter of 2012. These barriers are insulated with noise-absorptive materials such as rock wool, which helped reduce noise volume by about five
decibels. The NSL station underwent another upgrade in 2016; this included the repositioning of seats on the platforms to allow more space and seats for commuters to be added.
Bishan tunnel flood On 7 October 2017, during heavy rain in the afternoon, water entered a section of tunnel between Bishan and Braddell MRT stations, disrupting NSL train services from
Ang Mo Kio station to
Marina South Pier for several hours. This was the first time train services in Singapore were affected by flooded tunnels. Separately, at about 5.55pm, a small fire ignited in the tunnel between
Marina Bay and
Raffles Place stations but it is not clear the fire, which was extinguished by itself, was linked to the flood, although electrical short circuits caused by water had previously caused tunnel fires. Train services between Marina South Pier and
Newton resumed at about 9.20pm that day. After the
Singapore Civil Defence Force (SCDF) worked overnight to clear the water in the tunnels, Through investigations by the
Land Transport Authority (LTA), it was discovered the overflowing in the tunnel was caused by a malfunction in the poorly maintained water pumping system, which was repaired. On 20 July 2018, the Land Transport Authority fined the operator a combined S$1.9 million (US$ million) for this incident, in addition to the
Pasir Ris rail accident, and subsequently sacked eight workers involved in the incident due to their negligence by falsifying maintenance records and not maintaining the pumps. == Station details ==