45,500 m² Palplanj, 96,700 m³ Excavation, 27,400 m³ Crushed stone filler, 3,500 m B.A Pipe laying, 6,000 m Miflu B. Pipe laying. For the connection to Marmara Main Collector by bringing Avcılar coastal collector to the South-Küçükçekmece Pre-Treatment Elavation Center. On the Avcılar Coastal Collector and Side connection channels; 3,500 m Ø 2,600, Ø 2,400, Ø 2,200, Ø 1,800, Ø 1,600, Ø 1,000 and Ø 800mm reinforced concrete pipe (in the collector); 5,990 m Ø 500, Ø 400, Ø 300 mm bellmouth concrete pipe (in the wastewater channel) are laid. In order to do this work, 96,700 m³ of excavation, 45,500 m² of sheet piling, 27,400 m³ of crushed stone and stabilized filler has been made.