The Project belongs to Riyadh Municipality. Whereas the purpose of this project was to drain rainwater flood in Riyadh City by using big channels to avoid its accumulation on streets and to exploit in the future by constructing on streets and to exploit in the future by constructing water reservoirs to benefit from this practicability waste irrigation or its filtration for better uses. The scope of work resumed to support the infrastructure services by constructing a box culvert channel on variant streets ways passing through both Al-Aqiq Quarter and Al-Malga. The work comprise excavation of a box culvert of two and half meter in depth on both ways of the street follows by casting the floor and flat reinforced concrete walls supported by poles in between in addition to infusion of channel ceiling with reinforced concrete as well as the required specifications under supervision of approved consultant nominated by the project owner. The channel can be connected to the future necessary lines with all needed fittings in addition of the water catch basing, maintenance openings and insulation works with bitumen layers for the entire