The owners of the McArthur River mine near Borroloola in the Northern Territory have begun an appeal against a Supreme Court ruling in April, which blocked their expansion plans.
In October 2006 Minister Chris Natt approved an application by Xstrata to convert operations from underground to open cut and divert the McArthur River.
The Supreme Court later upheld legal action by traditional owners ruling the approval process was flawed.
The Northern Territory Government then legislated against that decision allowing the mine’s expansion to go ahead.
Despite this Xstrata is today appealing against the original court decision, which it argues still sets a legal precedent which could affect future mine approvals.