A historic Paddy's River Box tree will remain in Burradoo and more specimens will be planted to ensure the future of the vulnerable species.
On November 7 a large section of the threatened tree fell on the corner of Moss Vale and Eridge Park Road.
A spokesperson from Wingecarribee Shire Council said crews had been onsite and inspected the tree.
"They'll be undertaking some extensive pruning of the tree because it suffered some pretty severe damage which has comprised its structural integrity," they said.
The spokesperson said the tree would not be cut down.
"While it won't be coming down, it will be pruned pretty heavily to ensure its made safe and that should stop further branches from falling in the reserve.
"At the same time as we carry out this pruning, staff will be planting some new 'Paddys River Box' specimens in the reserve to complement the tree that suffered the damage."
This tree is a Eucalyptus macarthurii, or Paddy's River Box, once a very prominent species in the area, but now uncommon due to land clearing. The tree is listed as a Vulnerable Species under the threatened Species Conservation Act 1995.
The Paddy's River Box is a significant species in Southern Highlands Shale Woodland ecological community which is listed as an Endangered. Growing under the tree are grasses and perennials typical of this community.