Good decision by the High Court but be careful what you wish for.
Firstly for those advocating dumping on land the question is where? Soft, unconsolidated marine sediments with very high moisture content is not suitable for building or road fill without time consuming and costly treatment (lime or cement stabilisation). Therefore contractors won’t touch stuff unless required by the client, e.g. POA maintenance dredging that was cement stabilised fill for the Fergusson container terminal extension.
Secondly, eliminating the offshore dumping option or at least requiring dumping to move ev