Qatar’s Public Works Authority (Ashghal) is preparing to issue tender documents for the contract to build an estimated $200m sewerage tunnel in Doha.

Ashghal is currently evaluating prequalification requests from international and local companies and is expected to finalise the prequalification list and issue tender documents by the middle of July.

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 sewerage tunnel will provide drainage for the new F-ring road when it is completed. 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.

Ashghal is currently evaluating prequalification requests from international and local companies and is expected to finalise the prequalification list and issue tender documents by the middle of July

In January, the joint venture of Athens-based Consolidated Contractors Company and the local Teyseer Contracting was awarded an estimated $178m contract to build the F-ring road, which is the 12th package of the Doha Expressway.