The project of the implementation of the sewage transmission line in the west of Shahriar city, from Jihad Square to the vicinity of the 300-bed Kohenz Hospital, with a length of 1955 meters, with a double-walled polyethylene pipe with a diameter of 1200 mm, at an average depth of 7 meters, using a tunnel method with 28 concrete manholes Prefab is produced in the workshop and installed as puzzle pieces at the place of execution. It should be noted that due to the conditions of Jihad and Basij Squares, as well as the Baba-Gorgi Beltway and the heavy traffic on this route, most of the executive operations are inevitably carried out during the night and from 1 to 5 in the morning.