I'm with the developers. [}:)]
Anyone with Half a brain would know that, when you change the natural shore line currents, you also destroy the natural food source that is carried with it in effect creating deadwater & marine life disappears !!
Stuff the enviromental feasability studies which will see someone backhand half a million dollars to say yes

- geeze - just give me $5 bucks petrol to get to the Wonderfull freo wharf restaurants (small scale development) & look over the side at the thriving unaffected marine life - microbial of course under half meter of sludge

!!!
Where do they think there run off is going to go ???? Its bad enough that 'some ' narrow minded people epecially stupid rich ones

, tip everything under the sun down drains - if will save them a Quid. With their special landscaping goes fertilisers etc and we all know what happens in the Swan river with that. But that'll be ok cause the Ocean will drag it all away, and no one will be the wiser

.
Last time I went crusing to Rotto (launch) my marine maps showed the deep water currents flow past there. No Worries Mate - we'll blame it on the Cargo ships !!!
To end on a high note ...

All may end well if one of our Flash as, High Tec faulty Collins class Submarines accidentally bumbs into it - blowing it all to Hell - leaving a nice little reef & flat water spot, Tax free of course

p.s Name witheld in case they want to Name it after me