Yenikapı Wastewater Tunnel Project, which transports the wastewater of Gaziosmanpaşa, Eyüp and Fatih Districts, located in the Southern Golden Horn basin, to the Yenikapı Wastewater Treatment Plant (European Side 2nd Part Wastewater Tunnel Construction) includes the construction of a tunnel with EPB-TBM with an inner diameter of 3600 mm, an excavation diameter of 4600 mm and a length of 8500 m. There are also two shafts with an inner diameter of 9 m, five shafts with an inner diameter of 7 m and two shafts with an inner diameter of 5 m, and a connection tunnel with an inner diameter of 2.20 m and a length of 934 m.
