Demolished / No longer exists
(Day & Month are approximate.)
Date closed / demolished
(Day, Month, & Year are approximate.)
They're shown here on a 1947 map (Plate 4-7, Mapping Hong Kong).
On a 1990 map (Plate 4-9, Mapping Hong Kong), this area is still marked "Gas Works", but so is the piece of land on the opposite side of To Kwa Wan Road (see http://gwulo.com/node/23669).
At some later date this site was redeveloped, and now it is the site of "The Grand Waterfront", a residential development.
Later place(s) at this location
Due to the aerial view form 1964, it seems that both gas works were operational for some time during the early 1960's.
The (Ma Tau Kok)Towngas was built in 1930s and extended in 1956. The south plant was demolished in the mid-1990's and redeveloped into Grand Waterfront in 2007.
Item 27 of the 1935 PWD Annual Report is a list of "Buildings of importance completed" and mentions this site: "Gas holder and tar tanks at To Kwa Wan;"
end of operation
On the following photo from 1998, the south plant has been demolished:
On another photo from 1995, it's demolished already. This photo is on the MMIS website (don't know if it is allowed to post it on Gwulo).
So probably 1994 is a good approximation for the demolition year.