Qatar tenders completion of 39km strategic trunk sewer

11 September 2025

Qatar’s Public Works Authority (Ashghal) has issued a tender for the completion of the remaining works on the strategic trunk sewer from Sheehaniya to the Doha North sewage treatment works (DN STW).

The package also includes the first phase of a new sewage terminal pumping station at the DN STW site.

The tender, numbered PWA/GTC/26/2025, has a bid submission deadline of 30 September.

A tender bond of QR12m ($3.3m) is required, and tender documents are priced at QR45,000.

The project will channel sewage across a 27,320-hectare area, making it one of Qatar’s largest sanitation infrastructure undertakings.

Located in Al-Sheehaniya municipality, the sewage will be channelled through interceptor sewers into a new deep tunnel trunk sewer of about 39 kilometres in length, with diameters ranging from 600mm to 1,800mm.

The infrastructure will serve villages, farms, army camps, camel stabling areas and a new residential development, the authority said.

According to MEED Projects, Aljaber Engineering was previously awarded the main contract for the project in 2021, following a bid of $83.7m.

Ashghal said the contractor completed about 15.7km of the sewer, but did not state why construction stopped.

Sheehaniya Terminal Pumping Station​​​​​​​

The new Sheehaniya Terminal Pumping Station will have a capacity of 1,200 litres a second and is designed to meet demand up to 2037.

The first phase, included in this contract, will install four pumps with capacity to handle about 615 litres a second.

Other works include rising mains, surge vessels, screening facilities, odour control systems and supporting buildings.

Both the sewer works and the Sheehaniya pumping station are expected to take around three years to complete, followed by a year of maintenance.

The project will also include testing and fixing any previously completed works six to nine months after construction begins.

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Mark Dowdall
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