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Dredging the shallow seagrass meadows in Mangles Bay in Rockingham to create a boating channel for a highly controversial canal housing/marina is causing major concerns because of the already high levels of mercury in the area. It is believed that dredging the channel will stir up more mercury that has settled on the bay floor over a 100 years, from heavy industry in Cockburn Sound.
The EPA has approved the ‘Mangles Bay Marina’ development (with conditions), but there have been 51 different grounds of appeal from 19 sources, including some from high ranking scientists. The EPA say they have conducted a thorougher assessment, but many are highly skeptical about this decision and other decisions that they have made.
The Wilderness Society is taking the EPA to court next month over their James Price Point assessment process here
About 40 hectares of reserved Bush Forever land will also be completely destroyed if they dig out the inland canals. This is likely to effect ground water and raise acid sulfate soil issues. See the Urban Bushland Council and the Wildflower Society submissions here