Construction of storm water networks with GRP pipes and precast concrete box channels including trench works, supply & laying of pipes and culverts, re-asphalting, traffic detours, thrust boring works and relocation of existing utilities at various districts in Riyadh City. Project scope includes 42 km of network up to 1200 mm diameter, 130,000 m3 reinforced box culvert, 5,500 meters thrustboring works and related earthworks and asphalt road activities.