Aramco is also working to select the project management consultants for the expansion of the 1,600 million cubic feet a day Hawiyah gas plant. This project would expand the capacity of the Hawiyah plant by an additional 800,000 cf/d. The capacity of 600,000 barrels a day Juaymah gas fractionation plant would also be increased, after the completion of the project. Saudi Aramco is also proceeding with negotiations with international oil companies on the estimated $3,000 million Rabigh refinery upgrading and ethane cracker project. In addition, a propane dehydrogenation unit has also been envisaged in the project for the production of polypropylene.