Pitch Drainage

Pitch Drainage

By George Ian Marr
11 June
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Sand Slit Drain Construction begins


On Monday we started the construction of the Sand Slit Drains. These drains run from touch line to touch line and will take the water down from the surface and into the Lateral Drains where it will run through the perforated PVC pipes into the inspection chamber and out into the river.
The Sand Slit Drains are approximately 75mm wide, 225mm deep and are spaced 1.5m apart. The trenches are filled with gravel then topped off with coarse sand.
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