This Project comprises construction of two 15.5km long outfall pipelines from the Sewage Treatment Plant near Jeddah Airport to the Red Sea. 

The Challenge

The Ministry of Water and Electricity, Saudi Arabia was seeking to construct two 15.5km long outfall pipelines from the Sewage Treatment Plant near Jeddah Airport to the Red Sea. 

Al-Muhaidib Contracting Co. are the main contractors for the project and commissioned Royal HaskoningDHV to provide consultancy and design services for the Sewage Treatment Plant Marine Outfall section in Jeddah to provide the sub contractor HUTA marine to procure materials, construct and install the twin marine outfalls.

The Outcome and Solution

Royal HaskoningDHV carried out the engineering and hydraulic design of the twin marine outfall. The Jeddah outfall is required to discharge treated effluent produced from the treatment plant located near Jeddah airport into the Red Sea. 

The marine section of the outfall arrangement consists of twin 2200mm diameter pipes that are approximately 500m long. The outfall is required to convey a peak flow of 750,000m3/day at 60m below sea level. The marine section starts from Al-Sanabill roundabout at Jeddah Cornish to the Red Sea.

Royal HaskoningDHV was also commissioned to carrying out the following works with regards to the twin 15,000m long land section of the outfall:

  • Review of the existing hydraulic design.
  • Verification of routes and layouts.
  • Manhole chamber design and locations.

Construction of the outfall, based on Royal HaskoningDHV's design, started in late 2012 and was completed in early 2013 by specialist outfalls installation contractor HUTA marine.

Contact us

David Watson

Sector Director - Intakes, Outfalls & Marine Pipelines

Newcastle, UK

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