Heavy metals released into flood waters
Queensland Friends of the Earth Press Release 29th December 2010: Queensland's environmental regulator the Department of Resource Management (DERM) is powerless to stop flood waters creating massive pollution from mine sites across the state. Mines will be releasing huge amounts of heavy metals into the flood waters and much of this will pile up behind weirs in catchments like the Fitzroy and be a pollution problem for many years. Pollutants include dangerous levels of copper, uranium, zinc, aluminium, lead, arsenic, cobalt and nickel.
Even more worrying, flooding of coal seam gas areas is undoubtedly over-topping holding ponds containing large amounts of salty water. Once this salt hits the high clay content black soil plains of the Darling Downs it is likely to destroy the ability of these fields to produce again since salt on soil containing more than 30 per cent clay renders such soil unproductive.
Friends of the Earth spokesperson Drew Hutton said this was the third year in a row that major flooding had caused serious pollution events. In 2008 the Ensham coal mine in central Queensland was flooded and heavy metals were released into the Fitzroy catchment. In 2009 the Lady Annie copper mine in north Queensland released large amounts of heavy metals when its tailings dam was breached.
These events were possibly the biggest pollution events in the state's history.
"The mining industry's claim that dilution solves all these problems is fanciful," Mr Hutton said.
"The dilution effect will offer some diminution of the damage but the heavy metals released from mines will lodge behind any obstructions in the river system and stay in the sediments, ready to be mobilised and the salt from coal seam gas operations will ruin good farmland.
"It is illegal for mining companies to cause such high levels of pollution but all the State government can do is approve these releases and hope for the best.
Photo: Damp - Taken by Michael Jefferies on Flickr - Creative Commons 2.0 Non-commercial Attribution licenced