United World College of South East Asia. Full slitdrain (photo A), sand carpet field and training area (photo B). Trenching main drain.
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A.
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B.
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Trenching lateral drains at 90 degree to main drain across field (photo C). Trenching slitdraiins at 2mtrs centers (1st pass) across lateral drains (photo D).
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C.
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D.
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Backfilling gravel and sand into slit drains (photo E). After slitdrain installation and 50mm of sand spread (photo F).
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E.
F.