Project record

Ghubrah III IWP desalination marine system

Aerial view of active Ghubrah III construction beside the seawater edge, with intake structures, pipework, cranes and process buildings

Sogex Oman; exact Ghubrah III construction image

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.

Project signal

Construction in Oman

Current status Under construction; Nama PWP targets commercial operation in Q1 2027 Source confidence Confirmed

Location

Oman / Middle East

Segment

Marine utilities

Status

Under construction; Nama PWP targets commercial operation in Q1 2027 / Confirmed

Last checked

20 July 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
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 evidence boundary
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.

Project timeline

Material developments

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

Open this project in the Change Log

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.

Source

Nama 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.

Source

Savener 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.

Source

Nama 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.

Source

Evidence gap

What remains unverified

Outstanding evidence

  • 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

Related records 2

Reporting status

Construction, confirmed confidence

Last checked 20 July 2026 across 9 cited sources. The dated timeline above carries the project events.

Last checked 20 July 2026 Cited sources 9

Sources and related records

Read featured analysis Methodology Submit a correction Project tracker
Source collections

Project sources 9