That is about 170 truck loads by the way.
But do not panic, the venue is not being buried for good, rather the dirt will be carefully crafted into a supercross track.
The 'Brook will host the fifth stage of the Australasian supercross championship on Saturday and work on the course started yesterday.
Experienced track designer Jason Baker is overseeing the construction and promised the Otago Daily Times he would treat the grand old lady with the respect she deserves.
The hallowed ground will be well protected by a layer of geo fabric with another layer of construction ply on top of that, he explained.
"The good thing with the geo fabric versus plastic is it allows the surface to still breathe," he said.
"The dirt never touches the grass. We haven't had any issues with it and we've been doing this for three years."
However, there were problems after the first stage of the event in Newcastle, Australia, last month.
The Newcastle-North Queensland A-League match was called off because the ground was deemed unsafe to play on.
The blame was directed at the Newcastle Knights for allowing the supercross event to be held at the ground so close to the scheduled football match.
The New South Wales Government shelled out $500,000 so the turf could be repaired immediately.
"There were some mistakes made in Newcastle but not by us," Baker said.
"We told them they needed a minimum of two weeks to let the turf regenerate. They wanted to be on it in five days and that's not going to happen.
"It was a management thing. They just wouldn't listen to us."
It is a costly undertaking constructing a temporary track.
Management was not prepared to discuss just how much the production bill would be but it could run as high as a couple of hundred thousand dollars.
Whatever the cost, fans can expect a fast track and some high octane fun.
The track will be 570m long and the biggest jumps are 2.5m high.
The riders can get as high as 7m in the air which makes for spectacular viewing.
A good track is one which flows and allows the competitors the space to pull-off passing manoeuvres and get into some rhythm on the jumps, Baker said.
"You don't want it too narrow and it can't be too hard to pass. They're the key elements."
The track, which is expected to be fast, will take three days to build and a day to tear down.
Race night makes all the hard work worthwhile, Baker said.
"That is the best night for me. I get to sit up in the stands and watch them go at it.
"I don't build this thing so it is a masterpiece. It is not suppose to stay like this. I know as soon as they wave the chequered flag they'll be tearing this thing down."
