Oman- Haya Water's sea outfall projects in full swing

Date

8/30/2016 2:37:57 AM

(MENAFN- Muscat Daily) Muscat-

Haya Water is working on two sea outfall projects in Darsait and Azaiba.

In 2010, Haya Water appointed Halcrow to carry out feasibility studies and develop designs for emergency marine outfalls at two prime locations from the Darsait Sewage Treatment Plant (STP), the third largest STP in Muscat, and from Azaiba Central Pumping Station (CPS), which pumps all the collected sewage from Bausher catchment into Al Ansab STP, the second largest STP in Muscat.

The Darsait Sewage Treatment building coincides with the establishment of the two outfalls in Darsait and Azaiba. This project is important as it discharges the surplus of treated effluents. Both projects will greatly help in discharging mixed raw sewage and storm water during storm and cyclone events.

Although networks are dedicated for transporting sewage, storm and rainwater may enter these networks via sewage manholes designed to handle a limited amount of storm flow.

A comprehensive series of surveys and investigations has been conducted with detailed design work including 2D and 3D hydrodynamic dispersion modelling, environmental impact assessment (EIA) and hydraulic, surge and structural analysis. The proposed outfalls are 1600mm dia HDPE, extending upto a length of 3,100m in water and depth of upto 22m in Azaiba and a length of 2,500m in water and depth of upto 45m in Darsait.

Técnicas Reunidas and Sarooj Construction Company were appointed by Haya water to excute detailed design and construction works in August 2014. Around 85 per cent of the project is complete; it is expected to be accomplished by end of 2016.

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