Abu Dhabi a STEP closer to $1.5bn super sewer

Abu Dhabi ceremony to inaugurate $1.5bn sewerage tunnel project.

STEP is Abu Dhabi's 'super sewer' project.
STEP is Abu Dhabi's 'super sewer' project.

A ceremony has been held to mark the inauguration of STEP, the $1.5bn Strategic Tunnel Enhancement Programme in Abu Dhabi.

Sheikh Hazza bin Zayed, the national security advisor and vice-chairman of the Abu Dhabi Executive Council, said the project would give the capital “a well developed and comprehensive infrastructure for the future.”

STEP aims to replace some of the existing pumping stations in Abu Dhabi and will decrease the pressure on the existing system. The project includes construction of a 16.2km tunnel with a 4m diameter.

This package (T01) is one of the three packages making up the deep tunnel sewer linking the northern part of Abu Dhabi Island to the mainland. The deep sewer tunnel will have a total length of 42km. It is believed to be one of the longest gravity-driven wastewater tunnels in the world.

The other two packages include the construction of a sewer tunnel from the Mussafah area to Mafraq (T01) and a sewer tunnel from Mafraq to Al Wathba (T03).

Abu Dhabi Sewerage Services Company (ADSSC) has appointed CH2M Hill as the programme manager for the STEP project.

“With Abu Dhabi’s significant population growth over the past 20 years, STEP will enable ADSSC to prepare for future expansion and continue to protect the environment and improve the quality of life for Abu Dhabi residents,” said CH2M Hill MD Omur Akay.

STEP is the latest in a collection of major sewer tunnel programmes managed by CH2M Hill. It is in charge of the Thames Tideway Tunnel Programme, a combined sewer overflow system including a 32km-long storage tunnel that will be the deepest ever built beneath London.

It has also completed a comparable project in Singapore, where it provided programme management for one of the world's largest wastewater reclamation and sewer tunnel projects, and in Milwaukee, Wisconsin, for the first large, successful combined sewer overflow deep-tunnel system completed in the US.

ADSSC is one of the eight fully-owned subsidiary companies under Abu Dhabi Water and Electricity Authority (ADWEA). Currently ADSSC is the only licensed entity engaged in sewerage, treatment and disposal of wastewater across the Emirate of Abu Dhabi.


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