Qatar’s Public Works Authority (Ashghal) is currently prequalifying companies for the contract to build a sewerage tunnel in Doha.

The work will involve constructing the 9.5-kilometre-long Abu Hamour southern outfall tunnel, which will run from Musaimeer street along the line from the proposed F-ring road to New Doha International airport.

The contract will also involve the construction of a 580-metre tunnel to collect surface water. The project is estimated to take four years to complete.

Tender documents are expected to be issued to prequalified companies by the end of April.

The tunnel will provide the main water drainage for most of Southern Doha, covering a total area of about 170km.

The project is part of Qatar’s plans to invest $20bn on new roads and related drainage and infrastructure over the next five years.

The sewerage tunnel will provide drainage for the new F-ring road when it is completed. In January, the joint venture of Athens-based Consolidated Contractors Company and the local Teyseer Contracting was awarded an estimated QR850m contract to build the F-ring road, which is the 12th package of the Doha Expressway.

The F-ring road work will be about 8km in length and will extend from the intersections of Abu Hamour and Al-Muntazah streets to the New Doha International airport. The project will include the construction of a six-lane carriageway, four interchanges, infrastructure and landscaping.

Ashghal recently invited contractors to bid for package six of the Doha Expressway project. The work for package six involves upgrading the existing East Industrial Road to six lanes as part of the new expressway (MEED 252:11).