The air raid shelter at Blk 78 Guan Chuan Street occupies an area of 1,500 sqm and it could accommodate up to an estimated 1,600 persons. It is also believed to be the site for the Air Raid Precaution Wardens' depot.
Military - Bunkers
The air raid shelter at Blk 78 Guan Chuan Street is significant because it is the only public housing building by the Singapore Improvement Trust to have been built with an air raid shelter as part of its design. It is also significant because it is the last remaining pre-war civilian air raid shelter still in existence today.