4,500 meters of Kemerburgaz-Northern Golden Horn waste water collector was taken into service. 37 new manholes of 5 to 7 meters depth were reconstructed on the existing sewer collector and clogged parts of the system were cleaned by using truck-mounted high velocity sewer cleaning machine. By using steel sheet piling system, the neighboring roadway and the drinking water lines were secured and Kemerburgaz- Northern Golden Horn waste water collector was partially rehabilitated. As a part of this project, Beşiktaş Ihlamurdere waste water system was rehabilitated by using Ø2,200 mm reinforced concrete pipes.