Project name:

Bulk Outfall Sewer from New City to Waste Water Treatment Works in Port Harcourt

Client name:

Greater Port Harcourt City Development Authority


Port Harcourt City, Rivers State, Nigeria

Project description 

Arcus GIBB Nigeria was appointed in 2007 to investigate and report on alternatives for the disposal of sewage within the Greater Port Harcourt area.  This project included conveyance via a new bulk outfall sewer from the new city development to the Ogbogoro Waste Water Works.  The appointment also included the design of approximately 24.5 km of gravity (1 350 mm to twin 1 800 mm diameter HDPE lined concrete pipes) and 8.3 km of pressure mains (1 000 mm to 1 400 mm diameter GRP and Ductile iron pipes) between the new city development and Ogbogoro Waste Water Works and included the design of three pump stations.


Arcus GIBB Nigeria responsibilities 
  • Authority liaison
  • Route selection
  • Determining the best suitable pipe material and Manning’s in value to be adopted for this project
  • Deep gravity mains and manholes in excess of 8 m deep
  • Self sustainable pump stations
  • Design of all civil, structural, mechanical and electrical components
  • FIDIC tender documentation



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