Near the ports inner harbour berths no.11 and 12, an underwater rock mound will be constructed to protect the Fremantle Rail Bridge from the risk of ship impact. The decision to install this barrier follows shipping incidents in 2011 and 2014. The underwater rock mound will provide additional protection for the north-western section of the bridge. As an added safety measure, Fremantle Ports has also invested in a Shore Tension hydraulic mooring system and installed additional storm bollards. The underwater rock mound will be about 60 meters long and 20 meters wide. The work is expected to begin in early July and be completed in August.