• Oman tenders three of the seven dams planned along Wadi Aday
  • Artelia has completed designs for scheme to protect Muscat from flooding
  • The largest dam will have a capacity of 23 million cubic metres

Oman’s Regional Municipalities and Water Resources Ministry (RMWRM) has tendered three contracts to construct dams along the Wadi Aday in Muscat governorate.

The bid deadline for all three projects is 20 April 2015.

French consultancy firm Artelia has completed a $280m-contract to design a flood protection system for Wadi Aday, including seven dams. It will protect the Muscat area from the type of severe flooding it experienced following Cyclone Gonu in 2007.

The Wadi Aday G2 Dam will be 45 metres high with a crest length of 220 metres and have a capacity of 23 million cubic metres (m/cm).

Madinat al-Nahdah B411 dam will be 22 metres high and with a 1,070 metre crest length and a capacity of 7m/cm, while Al-Mahaj B412 dam will have a height of 20m a crest length of 3,200m and a capacity of 17 m/cm.

Al-Jufainah B6 dam will have be 31 metres high with 2,500 metre crest length. Its capacity will be 16 m/cm.

Tenders for construction supervision for the three dams were issued in mid-2014.

Austrian firm Strabag was awarded a $75m contract for the first dam, in Al-Amerat Heights in 2009. Completed in February 2012, it has a height of 21 metres and a capacity of 22 m/cm.

Two further dams with a capacity of 9 m/cm are planned, but have not yet been tendered.

RMWRM is also tendering a contract for consultancy services on flood protection schemes in North and South Al-Batinah Governorates with a 6 April deadline. The work involves a feasibility study and designs.

Tenders for the separate Wadi al-Jifnin and Wadi Ghumdah flood protection dams were issued in 2014.

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