Bahrain tenders Tashan sewer scheme

29 July 2026

Bahrain’s Ministry of Works (MoW) has issued a tender for the construction of a sewer network in Tashan, on the outskirts of Manama.

Contractors have until 20 September to submit bids.

The scheme covers blocks 405, 419 and 421, administrative areas covering Tashan and surrounding communities. It will expand the local wastewater collection network and provide connections for existing and planned properties.

The scope includes about 2 kilometres of 150mm-diameter lateral sewers and 4.8km of main sewer lines ranging from 200mm to 400mm in diameter.

The contract also covers house connections and future connections for planned properties.

A pressure station with a capacity of 75 litres a second will be built as part of the scheme. It will be supported by about 834 metres of 250mm-diameter rising main and a discharge chamber.

Other works include the construction of manholes and associated infrastructure, as well as the decommissioning of an existing lift station.

The project is part of Bahrain’s wider programme to develop and expand its sewerage networks and treatment infrastructure.

In June, MoW issued a tender for another sewer network project in A’ali, southwest of Manama, covering Block 730 and part of Block 740.

The scheme will connect 232 plots to the public sewer network. It includes 5.2km of sewer mains with diameters ranging from 200mm to 300mm and about 3.4km of 150mm-diameter lateral sewer lines.

The scope also includes house connections, new manholes and connections to the existing sewer network.

The bid submission deadline for the A’ali project is 5 August.

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Mark Dowdall
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