The work is being undertaken to offset the recent work undertaken on the Old Mendooran Reconstruction Alignment project.

About four hectares of trees will be planted as part of the restoration works in accordance with council's River Red Gum Restoration Plan. There will be advanced stock like the River Red Gum as well as native shrubs and grasses to reflect the area.

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Council's open space coordinator Ben Pilon said another 60 exotic trees that have been identified as diseased will be removed.

"Exotic species such as Claret Ash were planted along the river corridor some years ago. These trees are now diseased and in need of removal," he said.

"These exotic trees also create the risk of potential seed load into the Macquarie River and the Macquarie Marshes further downstream, so it's only appropriate we look to replace them with a native species."

Work should be completed by the end of October.