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Miahona and BESIX consortium named preferred bidder for Al-Haer Independent Sewage Treatment plant

  • Miahona and BESIX consortium named preferred bidder for Al-Haer Independent Sewage Treatment plant

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The Saudi Water Partnership Company (SWPC) has announced that a consortium of Saudi firm Miahona and Belgian infrastructure group BESIX is the preferred bidder for the Al-Haer Independent Sewage Treatment plant (ISTP).

Last July, Smart Water Magazine reported that four consortia had submitted bids for the Al-Haer ISTP project, in the country’s capital Riyadh. The planned capacity is 200,000 m3/day, and the facility is expected to start commercial operations in Q3 2026.

The statement by SWPC said the project includes a Treated Sewage Effluent (TSE) re-use system consisting of a 32 km transmission pipeline with a capacity of 400,000 m3, a pumping station and TSE reservoir tanks with a capacity of 200,000 m3.

According to the announcement, the levelized cost for the preferred bidder – Miahona and BESIX Consortium – is 1.9407 SAR/m3. The SWPC has also announced the reserved bidder, a consortium of Spanish company ACCIONA and Saudi group TAWZEA, with a levelized cost of 2.2041 SAR/m3.

The winning bidder is to form a special purpose vehicle (SPV) to operate and maintain the plant under a 25-year sewage treatment agreement (STA) with SWPC. SWPC’s obligations under the STA will be supported by a credit support agreement from the Saudi Arabian Government.

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