Hung Hom Ferry Pier (1st generation?) [c.1903-c.1963]
I believe this was the first generation of ferry pier at Hung Hom, but please let me know if there was any earlier one. It was off Winslow Street, in front of the junction with Gillies Avenue.
I first thought the pier went into operation in 1921, based on a request for tenders "for a licence for the exclusive maintenance of Ferry Services between Victoria, Hung Hom, Kowloon City, Saiwanho, and Shaukiwan." Tenders had to be submitted on or before 31 Dec 1920, and the licence would begin on 1st April 1921. Source: Item S.343 in the Government Gazette.
I skimmed the PWD annual reports from 1915 on, and the first mention of a Hung Hom Ferry Pier I found is in the report for 1921. Under Item 56, 'Dredging Foreshores', it says 1,993 cubic yards were removed from the Hung Hom Ferry Pier.
However Item 107 in the same report, 'Reconstruction of Ferry Piers' notes: "The expenditure during 1921 includes, in addition to the cost of new ferry piers, compensation in respect of Keng Shan and Hung Hom Piers and alterations to existing wooden piers." The mention of compensation makes me think the pier already existed in 1921, and the government bought it from the previous owner. The first map at http://www.hkmaps.hk/mapviewer.html that shows a pier here is the 'Map 1903.1', so that's the completion year I've guessed. 1921 may still be the first year that a ferry service operated from Hung Hom.
This site was reclaimed sometime in the late 1950s / early 1960s, and ferry services moved a short distance southeast to the two new piers in front of the bus terminus, one for North Point and one for Central. [Update: The area was reclaimed and the pier went out of use sometime in 1963-64, as described in Klaus's comment below.]