Tassell's Creek and Balcombe Creek are the two largest creeks on the Mornington Peninsula's Port Phillip coast. Up till 2002, neither had lost its nearby open space nor had its principal character transformed into a conduit for boats. A 10-year-old dormant scheme has been  reactivated to convert the creek and its nearby open space to a vast residential marina. That involved a waterway dug  back 1.5 km, and 2 groynes in Port Phillip. It has industrialized and suburbanized this last gap in continuous Balcombe Creek-Portsea suburbia.