| Bishan MRT tunnel flooding | |
|---|---|
 Tracks leading out from the station to the tunnel in the distance. | |
| Details | |
| Date | 7 October 2017 |
| Location | Between Bishan MRT station and Braddell MRT station |
| Coordinates | 1°20′55″N 103°50′51″E / 1.348542°N 103.8475287°E |
| Country | Singapore |
| Line | North South MRT line |
| Operator | SMRT Trains Ltd (SMRT Corporation) |
| Incident type | Flooding of MRT tunnel. |
| Cause | Human error, malfunction in the water pumping system, which has since been repaired. |
| Statistics | |
| Deaths | 0 |
| Injured | 0 |
| Damage | S$2 million |
The Bishan MRT tunnel flooding was a major incident on the North South MRT line (NSL) of the Singapore MRT which occurred at 5.33 pm on 7 October 2017. The flooding of the tunnels between the Bishan and Braddell MRT stations was caused by heavy rain and a faulty maintenance pump. The flooding completely blocked the tunnel, and bus services had to be deployed while the Singapore Civil Defence Force and maintenance staff removed the water from the tunnel. The incident caused more than S$2 million in damages and lost revenue for the operator SMRT and led to the firing of eight maintenance employees.