The Oman Wastewater Services Company (Haya Water) has invited contractors to submit bids for the contract to design and build sea outfalls for the new Darsait sewage treatment plant and Auzaibah central pumping station.

Contractors have until 10 June to submit prices for the outfall project.

Haya Water awarded the OR37m ($96m) contract to build the 50,000 cubic-metre-a-day (cm/d) Darsait sewage treatment plant to a consortium of Spain’s Cadagua and the local Galfar Engineering & Contracting in January 2011.

The Darsait catchment covers the areas of Al-Bustan, Aynt, Bait al-Falaj, Darsait, coastal Darsait, Hamriya, Muscat, Muttrah, Ruwi, Sidab and Wadi Kabir.