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Tenders were called and work commenced in February to enable the contractor to complete the foundation work during the dry season while the stream carried least water.
Quarries
156. To supply the department's requirements of aggregate for concrete and road building, the sub-department now operates two main plants at Hok Un and Tsat Tse Mui, quarrying and crushing close-grained granite and producing bituminous macadam. A small quarry for neighbouring roadworks previously operated at Hung Shui Kiu in the New Territories was closed down during the year. Until the Tsat Tse Mui plant came into full production in September, stone was quarried and crushed under contract at Morrison Hill where a third bituminous macadam plant was operated.
157. The Hok Un plant on the Mainland is a pre-war installation rehabilitated. Production during the year reached 150 tons per 8-hour day. Shutes from the hoppers deliver stone to a bituminous macadam plant. This consists of two similar units, one unit producing 1", the other 3" bituminous macadam,
158. On the Island, Tsat Tse Mui is the site of the pre-war quarry where the plant was wholly destroyed during the war and has just been replaced. Crushing is by a 24″ × 13″ "Hadfield" and a 20″ × 10″ "Edgar Allen" jaw crusher feeding a 53′ × 15″ bucket elevator to a "Parker" screening plant mounted over steel hoppers of 260-ton capacity. Plus 2″ rejects are returned to a "Parker" No. 2 Kubit Hammer mill and an 18″ × 5″ "Broadbent" granulator operating in closed circuit. The crushing capacity of the plant is 130 tons per 8-hour day.
Bituminous macadam and 1¼″ bituminous macadam is produced by a "Parker" and a "Marsden" mixing plant each of 1 cu. yd. capacity. The drying drum of the former is fed by a 48′ × 18″ belt which takes stone from 4 electrically operated hoppers.
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Tenders were called and work commenced in February to enable the contractor to complete the foundation work during the dry season while the stream carried least water.
Quarries
156. To supply the department's requirements of aggregate for concrete and road building, the sub-department now operates two main plants at Hok Un and Tsat Tse Mui, quarrying and crushing close grained granite and producing bituminous macadam. A small quarry for neighbouring roadworks previ- ously operated at Hung Shui Kiu in the New Territories was closed down during the year. Until the Tsat Tse Mui plant came into full production in September, stone was quarried and crushed under contract at Morrison Hill where a third bitu- minous macadam plant was operated.
157. The Hok Un plant on the Mainland is a pre-war instal- lation rehabilitated. Production during the year reached 150 tons per 8-hour day. Shutes from the hoppers deliver stone to a bituminous macadam plant. This consists of two similar units, one unit producing 1", the other 3" bituminous macadam,
158. On the Island, Tsat Tse Mui is the site of the pre-war quarry where the plant was wholly destroyed during the war and has just been replaced. Crushing is by a 24′′ × 13′′ "Hadfield” and a 20′′ × 10′′ "Edgar Allen" jaw crusher feeding a 53′ × 15′′ bucket elevator to a "Parker" screening plant mounted over steel hoppers of 260-ton capacity. Plus 2′′ rejects are returned to a "Parker" No. 2 Kubit Hammer mill and an 18′′ x 5′′ "Broadbent" granulator operating in closed circuit, The crushing capacity of the plant is 130 tons per 8-hour day.
bituminous macadam and 14′′ bituminous macadam is pro- duced by a "Parker" and a "Marsden" mixing plant each of cu. yd. capacity. The drying drum of the former is fed by a 48′ × 18" belt which takes stone from 4 electrically operated
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