Project record

Hassyan IWP seawater intake and outfall programme

Aerial view of the Hassyan IWP coastal site, seawater frontage, breakwaters, and intake-outfall infrastructure corridor

ACWA Power

DEWA commissioned Hassyan Block A, adding 60 MIGD by 31 March 2026. The first 180 MIGD phase uses a six-pipe marine corridor sized for the planned 240 MIGD complex: four 3 m intake pipes fed by eight risers 950 to 1,100 m offshore and two 3 m outfalls ending in diffusers outside the Ramsar boundary. Blocks B and C remain in the 2026 delivery programme, with full commercial operation listed for 15 February 2027.

Project signal

Commissioning in UAE

Current status Block A in service; Blocks B and C remain in the 2026 delivery programme Source confidence Confirmed

Location

UAE / Middle East

Segment

Marine utilities

Status

Block A in service; Blocks B and C remain in the 2026 delivery programme / Confirmed

Last checked

13 August 2026

Coverage

Related sectors

Marine utilities is the primary work classification. Related sectors connect this record to adjacent marine delivery and market coverage.

Subject index

Related subjects

These subject pages bring together related projects, technical articles, reports, and evidence methods.

Project anatomy

Contract scope and delivery roles

Client / authority
Dubai Electricity and Water Authority (DEWA)
Delivery parties
Hassyan Water Company A P.S.C., SIDEM (Veolia), SEPCO III
Contract route
US$914 million, 30-year build-own-operate independent water project under a DEWA water purchase agreement; SIDEM and SEPCO III form the joint EPC contractor, while Hassyan Water Company A is the project company.
Execution window
Block A, 60 MIGD, was commissioned by 31 March 2026; DEWA expected Blocks B and C, another 120 MIGD, during 2026; ACWA Power lists 15 February 2027 as the commercial operations date.
Works package
A 180 MIGD SWRO plant with eight offshore intake risers, four 3 m intake pipes, two 3 m brine and treated-effluent outfalls, terminal diffusers, intake screening and chlorination, electrical facilities, four potable-water tanks totalling about 412,000 m3, and marine capacity provision for a planned additional 60 MIGD phase.
Marine interfaces
The six GRP pipelines share buried onshore and offshore trenches through an 80 m planning corridor that crosses the Ramsar boundary. The offshore works were designed around about 530,000 m3 of cutter-suction dredging, trench depths of 5 to 6 m below seabed and a maximum formation level of -13.5 m CD. The outfalls sit near the Hassyan power-plant diffusers so dense RO reject and warmer buoyant cooling water can mix within the approved corridor; that interaction makes hydraulic performance, recirculation control and receiving-water monitoring part of the operating case.
Commercial evidence boundary
The main marine works sit inside the existing SIDEM-SEPCO III EPC contract. Near-term specialist demand is therefore more likely in commissioning support, intake screening and biofouling control, diffuser inspection, bathymetric or condition surveys, environmental monitoring and maintenance planning than in a new intake-outfall construction award. Any downstream Phase 2 potable-water transmission tender should be kept separate from the already installed offshore capacity provision.

Project timeline

Material developments

Dated events that changed scope, counterparties, delivery, commissioning or operating status.

Open this project in the Change Log

DEWA confirmed commissioning of Hassyan Block A

The first 60 MIGD block entered the installed water-capacity record, moving the project into phased commissioning while the remaining 120 MIGD, full marine-system acceptance, and sustained performance remain separate conclusions.

Source

First phase reported about 90 percent complete

The progress report narrowed the delivery window and put construction at an advanced stage. A percentage-complete statement left first water, accepted output, intake-outfall performance and commercial operation unverified.

Source

Hassyan IWP reached financial close

The owner announcement set the financed 30-year IWP delivery structure and committed development route. It contained no marine construction progress, commissioning result or accepted desalination capacity.

Source

Evidence gap

What remains unverified

Outstanding evidence

  • Commissioning and sustained output of Blocks B and C
  • As-built and acceptance records for eight intake risers and six buried marine pipelines
  • Mixing-zone salinity and interaction with the adjacent power-plant thermal discharge
  • Monthly and continuous water-quality monitoring inside and outside the Ramsar boundary
  • Maintenance access, intake biofouling control, and diffuser inspection
  • Future 60 MIGD expansion decision and shared marine capacity

Related records 2

Reporting status

Commissioning, confirmed confidence

Last checked 13 August 2026 across 6 cited sources. The dated timeline above carries the project events.

Last checked 13 August 2026 Cited sources 6

Sources and related records

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Source collections

Project sources 6