G'day to you all. Melbourne Port Corporation maybe upgrading Maribyrnong Siding with a extra siding to run from Youell Street along the old Povit line then along the river edge to Povit. Melbourne Port Corporation. Development Brief. Maribyrnong Street, Footscray land under MPC Control. Oct 1999. When it start is unknown, but when it does you will know. Regards Capt. W. J. Somerville.