Jubail Industrial City Largest industrial city in the Middle East and the largest construction engineering project in the world.[5][7] Bechtel has been overseeing construction since the project's inception in the mid-1970s.[5] The city has been built from a master plan designed by Bechtel and encompasses infrastructure to support 19 primary industries, and produce oil and gas-based products including refined oil, petrochemicals, steel, glass and aluminum.