Construction giant Leighton Holdings has won a $US608 million ($A800.26 million) contract to build the world's largest reinforced concrete reservoirs in Qatar.

The Habtoor Leighton Group (HLG) will build five reservoirs, pumping stations and other infrastructure for Qatar’s General Electricity and Water Corporation at a 100-hectare site at Rawdat Rashed. The reservoirs will have a capacity of 100 million gallons each. The project will start in April 2015 and is scheduled for…