Woohoooo - just found this snippet on another site :
" In the WA governments wonderful wisdom they are planning on building an island port for heavy shipping out in the middle of Cockburn Sound.
At the moment size wise they are talking around 2.6km long and 700 meters wide being dumped in the middle of the sound and 10 million cubic meters of seabed and seagrass being dredged. (plus a 1km road and rail causeway out there)." 
2.6kms plus a 1km causeway - WOW
Bring it on