The Drainage of the Road is a major feature of the road that can determine how long the road will survive the hydrological factors in the area. Since water weakens asphalt, it is advisable to make sure the water that gets on the asphalt easily runs off and finds its way to the nearest water body.

The surveyor made use of the coordinate in the design to locate and set out the points and mark the width of the excavation for the operator to excavate using excavator in which the depth of the excavation should be about 1m, after the excavation, the point is been set out again and level is taken for the drainage invert after which is the blinding of the excavated area using a concrete grade of M15 with the thickness of 50mm throughout the chainage, When the blinding is cured, the reinforcements are been arranged and positioned on the blinding. The reinforcement main bar (U-bar) is 12mm steels reinforcement while the distribution bar (Runner bar) is also 12mm reinforcement steels, drainage base was cast by the formwork been arranged properly and when it is set, concrete is poured and compacted with poker vibrator to remove voids from the concrete, the drainage base is set for curing. The base thickness is 150mm with the width of 1000mm according to the design but 900mm as pertain to what was constructed. When the base is cured, the formwork for the drainage walls are positioned and arranged, the drainage consist of two walls, one at each end of the base, the thickness the wall is 150mm each and the height of 600mm (from the drainage base), the height of the drain and base is 750mm. when the formwork are placed and supported with big concrete stones and woods, concrete is poured into the formwork and compacted with poker vibrating machine to remove voids from the concrete. This is how the drainage is been constructed throughout the length of the road. The ‘bucket’ has U-bar of 700mm by 700mm, the distribution bars are 12m in length.

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