Ras Laffan C IWPP

Water and power plants are crucial to serving the growing populations of the Middle East. WSP’s environmental and energy experts are leading the way in achieving regulatory compliance for this important sector.


  • Qatar


  • Mitsui & Co. Ltd (Mitsui) and Suez Energy International (SEI)

Project Status

  • Completed

Ras Laffan C is an independently owned water and power plant (IWPP) with a combined-cycle capacity of 2,730 MW of electricity and 63 million imperial gallons of desalinated water per day (MIGD) (286.4 million litres per day). This major project – among the Middle East’s largest – can supply approximately 30 percent of Qatar’s electricity and 20 percent of its potable water demand per day.

WSP was owner’s engineer for a range of services including design review, schedule review, factory acceptance tests, site construction and commissioning services, as well as performance and reliability testing.

Key Facts

2730 MW 2730 MW
Power Generation Method
Combined Cycle Combined Cycle
Volume of desalinated water

The major items of the plant consist of eight Mitsubishi M701F3 gas turbine generators and Siemens / Koncar power transformers, along with eight Doosan heat recovery steam generators. There are also four Mitsubishi steam turbines generators and Siemens / Koncar transformers; and 10 Sidem multi-effect desalination units with potabilization plant and reservoirs.

There is a 400 kV gas-isolated switchgear (GIS) substation with ABB switchgear, and 220 kV and 132 kV GIS substations. The 400 kV substation is the largest in the world, with 31 bays of GIS switchgear within a building measuring 531 feet (162 metres) long, 52 feet (16 metres) wide and 52 feet (16 metres) high.