Current condition
In use
Date completed
This Place is for the original, single-track tunnel carrying the railway line from the south portal near Kowloon Tong, through Beacon Hill, then exiting at the north portal near Keng Hau.
It is no longer used by the railway, but is still maintained as now several pipes run through it.
Comments
The pipes, the pipes
.. carry gas, operated by Towngas.
opening date 1910
Wikipedia reports that the tunnel opened on October 1st, 1910 - together with the rest of the line.