Monadelphous wins $250m in work ENGINEERING firm Monadelphous has won new work on two projects and extended a current contract in deals worth $250 million. The company has been awarded a contract to build a pipeline linking a gas plant at Chevron's Wheatstone project near Onslow in Western Australia to the Dampier-to-Bunbury natural gas pipeline. Monadelphous has also won the right to design and build a water treatment plant for the Central Highlands Regional Council in Emerald, Queensland. Finally, the company's existing management services work at the Gorgon project in Western Australia has been extended for one year.