Saudi Arabia, which is spending billions on boosting its infrastructure, plans to link its industrial city of Jubail and Dammam port to a network that connects to mining centers through Ras Al-Zour.Saudi Railway Organization said last month it had invited Saudi and global companies to pre-qualify for the Ras Al-Zour-Jubail link and the deadline for tendering is July 30. "Abdullah A. M. Al-Khodari Sons Company announces the signing of a memorandum of understanding on July 26 with both Balfour Beatty Group Ltd and Saudi Kier Construction Limited for the pre qualification and the submittal," the firm said in the statement.Saudi Railway Organization is managing the Kingdom's longest railway project, the 2,400 km North/South railway, and is financed by the state-run Public Investment Fund (PIF).In May, it started initial operations on a 1,392-km mineral line, linking phosphate mines at Al-Jalamid and a bauxite mine at Az-Zabirah to processing facilities at the industrial hub of Ras Al-Zour on the Gulf coast.