Supervising the implementation of sewage lines and sewage connections in the eastern regions of Riyadh. The project includes the implementation of horizontal excavation works. Many sewage projects and household connections have been supervised and the necessary studies were prepared for this, following up the work of all contractors and providing technical and administrative advice to support the employees of the National Water Company. The total length of the executed lines is 438 km of various diameters, and the number of household connections is 15,220