The contracts will be awarded to joint ventures in both Abu Dhabi and in Al-Ain under build-own-operate concessions.
“We are in the final stages of appointing a programme manager for the tunnel and this should happen in January 2008 at the latest,” says Thomson. “The new sewage treatment plants will be completed in 2010.”
The ADSSC is a government entity set up in 2005 to own and run Abu Dhabi’s sewers.
Thomson says it is treating more than 500,000 cubic metres a day of effluent in its two main sewage treatment plans in Abu Dhabi and Al-Ain.
Following the completion of a sewage masterplan early this year, the ADSSC decided to develop a deep-tunnel sewer that would replace some of the existing pumping stations.