OPW25/0012 - Arborist Report & Vegetation Management Plan

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[OCR of page images]
Arborist Report
3 &7 Serenity Close, Noosa Heads

83 Corymbia Driveway 15%
intermedia

388, 389 Allocasuarina Proximity of edge
littoralis of construction

works (<10%)

LTORIAS

Install trunk and branch protection measures around
the tree if required, in accordance with AS 4970-2009
Protection of trees on development sites and in
consultation with Project Arborist (Refer to VMP).
Mature specimen in good condition.

Driveway that encroaches within the northern
perimeter of TPZ by up to 15%.

Impacts to tree from encroachment proposed to be
avoided by suspended slab design (rather than a slab
on ground design). Suspended slab design avoids
impacts within TPZ by eliminating compacted fill.
Resulting impact < 10% TPZ area.

Piers or footings for suspended slab are to be
excavated via vacuum excavation to avoid damage to
the root system. Works to be supervised by Project
Arborist.

Both trees are required to be retained in accordance
with a historical development approval.

Condition of both trees is poor. Tree 389 has a leaning
trunk with a large split at 1 metre high (Figures 3 and
4). Tree 388 has significant lean and the canopy of the
tree contains an infestation of native Monkey Rope
Vine (Figure 5). Large split in the trunk of tree 389 and
the leaning trunk and Monkey Rope Vine infestation
within tree 388 comprise a significant defect that may
cause the trees to fail in a high wind loading event. In
addition, the species of trees 388 and 389 have
relatively short lifespans and both trees are likely
coming to the end of their natural life. For these
reasons, the trees may not have long term survival
prospects / may no longer be alive despite the
avoidance measures that have been made.
Encroachment minimised to <10%.

Install trunk and branch protection measures around
the tree if required, in accordance with AS 4970-2009
Protection of trees on development sites and in
consultation with Project Arborist (Refer to VMP).

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