|Sewage Main Line/Micro Tunneling
|National Water Company
|Olaya , Riyadh
4700 linear meters main sewage line in the busiest Olaya area in Riyadh, The project was executed by NDRC method of construction using Micro tunneling machines with diameters of 1400mm and 1600mm. The project consisted of 420 linear meters of a single crossing by NDRC method.