KEO was appointed as Project Managers on behalf of The Public Works Authority, Drainage Affairs (DA), to manage and co-ordinate the various consultants and contractors engaged for the design, construction, supervision and implementation of what was the largest project DA had undertaken at that time. The Doha North Project included the provision of a new Sewage Treatment Plant (STP), forwarding pumping station, pumping mains, interceptor sewers, trunk sewers and local sewerage to serve the areas north of Gharaffa, the West Bay area and the northern corridor including the Pearl and Lusail developments. The infrastructure also included a return Treated Sewage Effluent (TSE) pumping station and mains back to Doha for efflent re-use. The plant capacity is 245,000 m3/day.