Water Infrastructure
Rabigh 4 completes 600,000 m3/day performance test
SEPCOIII / PowerChina; exact Rabigh 4 IWP performance-test article image
SEPCOIII reports that Rabigh 4 completed its EPC performance test on 19 February 2026 at the 600,000 m3/day design capacity. Power use was 2.712 kWh/m3, falling to 2.659 kWh/m3 after photovoltaic generation. SWPC has not published commercial-operation acceptance.
The EPC test reached rated output
SEPCOIII provides the dated performance-test statement and measured power-use figures. ACWA defines the 600,000 m3/day plant, 1,200,000 m3 storage, 6.804 MWp PV system, project structure and scheduled Q1 2026 commissioning. Modern Marine identifies the project-specific intake and outfall flows. SWPC's February 2026 profile listed the project under construction before the test; no later SWPC commercial-operation certificate, final marine acceptance record or sustained environmental result is public.
The marine system carried the full plant load
Modern Marine gives the intake at 1,500,000 m3/day and the outfall at 900,000 m3/day. Both systems had to support the plant through the rated-output test. SWPC acceptance, final marine handover and receiving-water performance will determine when Rabigh 4 enters its 25-year operating term.
Evidence conclusion
Owner acceptance and marine close-out remain open
Rabigh 4 remains in commissioning until SWPC or the project company publishes commercial operation. The EPC result covers one defined test period; intake and outfall acceptance, storage availability, punch-list closure and long-run environmental performance remain open. Near-term demand lies in commissioning and lifecycle support. An operating reference requires owner acceptance and sustained performance.
Outstanding evidence
- SWPC or project-company commercial-operation notice
- Final intake and outfall handover
- As-built marine alignment and diffuser details
- Brine-plume and receiving-water monitoring
- Storage-system acceptance and availability
- Sustained output and energy use after the test period
Subject index
Related subjects
These subject pages bring together related projects, technical articles, reports, and evidence methods.
Sources used 6
- Rabigh 4 IWP EPC project performance test completed SEPCOIII / PowerChina, 21 February 2026
- Rabigh 4 IWP project profile ACWA Power, Current profile reviewed 20 July 2026
- Preferred and reserved bidders for Rabigh 4 IWP Saudi Water Partnership Company, 26 February 2023
- SWPC seven-year statement 2024-2030 Saudi Water Partnership Company, September 2024
- SWPC profile and project portfolio Saudi Water Partnership Company, February 2026
- Rabigh 4 IWP marine works project record Modern Marine, Current project page reviewed 20 July 2026