Location
Oman / Middle East
Project record
Ghubrah III IWP desalination marine system
Ghubrah III is a 300,000 m3/day seawater reverse-osmosis plant under construction in Muscat. Its marine system comprises two 2,000 mm intake lines, two 1,600 mm discharge lines, an offshore intake tower and a diffuser. Nama PWP's latest annual report targets commercial operation in Q1 2027. Public construction updates confirm an active site, but they do not quantify installed offshore pipe, tower or diffuser work.
Segment
Marine utilities
Status
Under construction; Nama PWP targets commercial operation in Q1 2027 / Confirmed
Evidence reviewed
20 July 2026
Controlled taxonomy
Related sectors
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Knowledge context
Related knowledge topics
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Project anatomy
Scope, counterparties, and execution logic
- Client / authority
- Capital Desalination Company SAOC under a 20-year water purchase agreement with Nama Power and Water Procurement
- Delivery parties
- GS Inima - EPC contractor and project-company consortium member, Aljomaih Energy and Water and Sogex Oman - project-company consortium members, PROES - basic and detailed marine works engineering, Savener - detailed IFC design of the seawater intake building
- Contract route
- Independent Water Project awarded by Nama PWP to Capital Desalination Company, the GS Inima, Aljomaih Energy and Water and Sogex Oman consortium, under a 20-year water purchase agreement. GS Inima is the EPC contractor.
- Execution window
- Nama PWP's 2025 annual report and 2026-2032 seven-year statement place the 300,000 m3/day project under construction with scheduled commercial operation in Q1 2027. The 2023-2029 statement had planned 150,000 m3/day of early water for summer 2026 and full operation in the second half of 2026; those dates are an earlier baseline, not current completion evidence.
- Works package
- Deliver the 300,000 m3/day reverse-osmosis plant and its seawater system. PROES identifies two 2,000 mm FRP intake pipelines, each 1,246 m long, leading to an intake tower at -10.5 m MSL, plus two 1,600 mm FRP discharge pipelines, each 1,493.92 m long, leading to a diffuser at about -7.75 m MSL. The four lines total about 5.48 km in aggregate. Savener's intake-building design adds three channels, each with a bar screen, continuous belt filter and control gates.
- Marine interfaces
- The offshore intake tower, twin intake lines, shore crossing, three-channel screening building, pumps, twin discharge lines and diffuser must be installed, connected and commissioned as one hydraulic system. Survey control, FRP pipe handling, marine access, diffuser placement, tie-ins, flushing and pressure testing, pump wet commissioning, brine dispersion and receiving-water monitoring sit across designer, EPC, marine subcontractor and owner boundaries.
- Commercial read
- The project-company and EPC awards are already in place. The open market question is remaining specialist execution and close-out rather than a new plant EPC competition: offshore pipe and structure installation evidence, marine survey, diving and ROV support, tie-ins, testing, environmental monitoring and commissioning. No marine installation subcontractor or completion quantities have been published.
- Next milestone
- Dated evidence of installed intake and outfall pipeline lengths, intake-tower and diffuser placement, shore and screening-building tie-ins, followed by hydraulic testing, wet commissioning, first water, owner acceptance and scheduled commercial operation.
Material change register
What changed, when, and what it proves
Only source-bound events that alter phase, scope, counterparties, delivery, completion, commissioning, or acceptance are listed. A change can advance the record without proving the next gate.
GS Inima reported four million work hours without a lost-time injury
The event brought together more than 1,250 project and subcontractor personnel and confirms a large active construction site. It does not state offshore installation quantities, mechanical completion, first water or owner acceptance.
Read controlling sourceNama PWP retained a Q1 2027 commercial-operation target
The latest owner annual report lists Ghubrah III under construction at 300,000 m3/day with scheduled commercial operation in Q1 2027, superseding the earlier 2026 programme dates without proving a new accepted completion date.
Read controlling sourceSavener completed the intake-building IFC design
The detailed design defines three screened intake channels and their control equipment. IFC completion authorises a construction basis; it is not evidence that the building, screens, pumps or marine tie-ins were installed.
Read controlling sourceNama PWP signed the Ghubrah III project agreement
The agreement fixed Capital Desalination Company as the project vehicle and the 300,000 m3/day capacity. Contract signature preceded construction and does not establish notice to proceed, marine mobilisation or completion.
Read controlling sourceDelivery watch
Evidence needed next
Dated evidence of installed intake and outfall pipeline lengths, intake-tower and diffuser placement, shore and screening-building tie-ins, followed by hydraulic testing, wet commissioning, first water, owner acceptance and scheduled commercial operation.
Decision watchpoints
- Installed and accepted lengths for all four FRP marine pipelines
- Intake-tower and diffuser placement, survey and connection records
- Shore crossings and intake-building mechanical tie-ins
- Hydraulic, leakage, flushing and pump wet-commissioning tests
- Brine-plume and receiving-water compliance monitoring
- First water and any pre-commercial output kept separate from SCOD
- Nama PWP acceptance and sustained 300,000 m3/day availability
Project availability status
This public project page is a tracked market record rather than a tender notice, contractual commitment, or commercial instruction. Use the status, confidence label, evidence-review date, and source note together when judging how much weight to place on the signal.
Read featured analysis Review methodology Submit stronger evidence or a correction Open project trackerSource record
Nama PWP signed the project agreement with Capital Desalination Company in February 2024. Its annual reporting says construction began in 2024 and now targets Q1 2027 commercial operation. GS Inima reported four million work hours without a lost-time injury on 4 May 2026, with more than 1,250 workers and subcontractor personnel at the event. That confirms the scale of site activity, not marine completion. PROES publishes the intake and discharge geometry; Savener publishes completion of the intake-building IFC design. Neither design record establishes installed quantities or accepted operation.
Phase: construction. Evidence reviewed: 20 July 2026.
Project sources 9
- Nama PWP Annual Report 2025 Nama Power and Water Procurement, 2025
- Water 7-Year Statement 2026-2032 Nama Power and Water Procurement, 2026
- Nama PWP signed agreement for Ghubrah III desalination plant Nama Power and Water Procurement, 25 February 2024
- Ghubrah III reaches four million work hours without a lost-time injury GS Inima, 4 May 2026
- Ghubrah III project agreement and EPC scope GS Inima, Publication date not stated; evidence reviewed 20 July 2026
- Ghubrah III desalination plant intake and discharge systems PROES, 4 September 2023
- Detailed IFC design of the Ghubrah III seawater intake Savener, 18 February 2025
- Construction of Ghubrah III IWP is in progress Sogex Oman, 2025
- Water 7-Year Statement 2023-2029 Oman Power and Water Procurement Company, 2023