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$200m sought to rehabilitate former Rum Jungle uranium mine

The Department of Mines and Energy is seeking $200 million from the Federal Government to rehabilitate the former Rum Jungle mine site.

Attempts to rehabilitate the site, Australia's first uranium mine, stem back to the 1970s.

Scientists from the Department of Mines and Energy (DoE) have been drilling at the site over the past three weeks and analysing rock samples.

It is estimated that five million cubic metres of rock will need to be relocated or re-buried in two of the mine's deepest pits.

The process is likely to take three years and cost millions, scientists say.

"Everybody knows that Rum Jungle has been here for a long time, but that doesn't mean we should still sit on it for a long time," said DoE principal mining scientist Tania Laurencont.

"During stage one we set that cost at just over $100m but as you work through detailed designed it's certainly looking more in the range of $200 million," she said.

Uranium and copper were mined at the site from the 1950s until the site closed in 1971.

Waste rock at the site was buried but it started releasing acid and metals into the nearby East Finniss River.

Ms Laurencont said the rocks were larger and more oxidised than was thought.

The Department said a purpose-built facility was needed to store the waste, so there was no further damage to the environment.

Last year the Federal Government allocated $14 million for developing a rehabilitation plan, in addition to $8 million already spent on a preliminary plan.

Acidic drainage has plagued the site since it closed and the Finniss River is a significant fishing sport for Indigenous people and Territory anglers.

The recreational reserve now known as the Rum Jungle South Recreation Reserve was shut from 2010 until 2012 by the Northern Territory Government where some low-level radiation was detected.

The Department will present its plan of rehabilitation to the Treasury in March next year.

Other plans to rehabilitate include cleaning up other areas of the site and reintroducing vegetation onto the site.