A reclaimed water pipeline designed to douse the Lindfield Park Road blaze in Port Macquarie will begin to flood the fire zone from August 30.
The 2.5 kilometre layflat pipeline will channel up to 30 mega litres of water into the 507 hectare fire zone west of Port Macquarie.
NSW Rural Fire Service (RFS) and Fire and Rescue NSW teams have been fighting spotfires in the area since it began on July 19.
The bushfire is being fueled by underground decaying vegetation and organic peat material which produces large amounts of smoke.
RFS district officer Stuart Robb said the pipeline will rehydrate the wetlands and flood underground peat burning.
"We are using reclaimed water from the Port Macquarie-Hastings Council to feed into pre-identified spots in the wetland," he said.
"We're anticipating it will be in the region of 30 megalitres of water over 50 days as a minimum to rehydrate the area and extinguish the peat.
"The layflat piping will be constructed by council commencing early next week with the view that we will have reclaimed water flowing by Friday (August 30)."
Department of Primary Industries, NSW Health, Port Macquarie-Hastings Council and the Environmental Protection Agency have been involved in the planning process with NSW RFS.
"There is a reclaimed water hydrant point on the corner of Boundary Road at Newman Senior Technical College. We will be running from there in a north-westerly direction to the tip of the Port Macquarie airport," said Mr Robb.
"It will continue down the airport boundary fence to the south-westerly corner to release points which have been identified.
"We can only put about half a megalitre a day into the wetland to avoid environmental issues."
Surface fires flared by strong winds have previously been water bombed by the Large Air Tanker (LAT) Marie Bashir on August 8 and 22.
Firefighters will continue to patrol the area and extinguish any new surface fires.
"It is a sensitive ecological habitat, one of the few remaining koala habitats in the area and a significant wetland," said Mr Robb.
"It's important to get the fire out and try to rehabilitate the wetland as much as we possibly can.
"We have got an executable solution and we can expect to see some results over the coming weeks."
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