Another point of the view to the points raised.
Gladstone Harbour development and dredging had plenty of environmental conditions.......
Once approved (even with conditions) there is no going back. There use to be a precautionary principle in the considerations ie if unsure, then don't risk it. They could dump it on land, but no, too expensive (so the economics don't stack up) and people would not like it in their back yard etc etc. The dredge material won't stay where it is dumped, I'm with Nathank. Also I feel for the tourist operators in the area. Anyway, my 2 bobs worth as part of this thread.
http://www.csiro.au/Outcomes/Climate...-is-wrong.aspx
http://www.swindonclimate.org.uk/200703ggws
http://www.gladstoneobserver.com.au/...ushed/2154396/