278. Maintenance work at Kai Tak Airport was also carried out. A new reinforced vibrated concrete box drain 20′′ by 22′′ by 2,670 ft. long was constructed along the southern edge of the 07/25 runway to alleviate the flooding which occurred after heavy rainfall. A trench drain 330 ft. long was also constructed to prevent ground water seeping under the foundation of the 13/31 runway. This consisted of a 22′′ diameter vibrated concrete pipe, perforated on the upper 3rds of the circumference, laid 7 ft. deep and the trench filled up with spalls of graded sizes. A further section of the hard-standing area was improved by reconstruction in 6′′ hardcore, 6" vibrated concrete and 1" bituminous macadam carpet. The access road 4,050 ft. long was resurfaced and a 5′-0′′ footway provided along the South side of the road for a distance of 2,770 ft. Traffic lights, operated from the control tower, were installed in Tam Kung Road and Ma Tau Chung Road on each side of the flight funnel. All markings on the runways were repainted every three months.
279. In the King George V Memorial Park, Kowloon, 4,300 square yards of the playground section was surfaced with waterbound macadam and given a bituminous wearing surface, while the football pitch of 2,300 square yards was laid with an experimental clinker base and an ash/laterite playing surface. This was done to provide a more resilient surface for the players. Herring-bone rubble drains were laid within the area of the football pitch under a base course of 3" to 1" clinkers. These were rolled with a 2-ton roller to a consolidated thickness of 3′′. A playing surface composed of 40% by volume of decomposed granite and 60% ashes passing a " mesh sieve was mixed by a concrete mixer and laid to a consolidated thickness of 3". Whilst this type of surface is less hard on the shoes of the players it required constant maintenance and adequate water supply for the prevention of dust nuisance.
280. MacPherson Playground which adjoins the Queen Elizabeth II Youth Centre, and the King George V Memorial Park in Hong Kong were surfaced to provide miniature football pitches and basket ball courts.
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