Appendix A - Tree Survey and Retention Plan

 

Noosa Council have approved the subdivision of 400 McKinnon Drive, Cooroibah (Council
Reference RAL25/0016). A small number of trees are to be cleared within the approved building
envelope (i.e. to locate a future house) within Lot 42, and a 14m wide bushfire setback is to be
managed around the building envelope and to maintain a reasonable Bushfire Attack Level
(BAL) construction rating under AS3959. The building envelope and asset protection zone adjoin
an area which is to be protected under a vegetation covenant and in which no vegetation
management can occur. In this regard it is critical that vegetation management occurs as per
the recommendations of this tree survey to ensure that a future dwelling can be safely located
within the site.

In this regard, a tree survey was undertaken within site with specific emphasis on the nominated
bushfire setback surrounding the approved building envelope. The nominated bushfire setback
was divided into an Inner Asset Protection Zone (which extends 10m from the location of the
approved Building Envelope) and an Outer Asset Protection Zone which captured the remainder
of the prescribed bushfire setback (measured up to 14m from the Building Envelope). All trees
located within the Inner Asset Protection Zone are to be cleared, whilst selective tree retention
within the Outer Asset Protection Zone can occur without substantially increasing the bushfire
risk to a future dwelling.

The tree survey recorded the location of native trees with a trunk diameter greater than 150mm
DBH within the bounds of the approved Building Envelope and associated 14m wide Bushfire
Setback. Trees were physically flagged on site to assist tree clearing contractors in identifying
which trees are to be cleared and which can be retained.

TABLE 1 - TREE DATA

Vegetation conditions within the bushfire setback must comprise low threat vegetation in
perpetuity as per the definition prescribed in AS3959 for the BAL construction standard to be
effective as intended. Low threat vegetation includes grass managed in a minimal fuel condition
(maintained lawn regularly mowed to <100mm), orchards and cultivated gardens. The small
number of individual mature trees to be retained are located on the outer extent of the bushfire
setback. The trees have been selected so that the canopy of retained trees will be separated
(i.e. less than 30% overall canopy cover shall remain within the setback). Wherever possible,
smooth barked trees have been nominated for retention over rough/stringy bark species.

It is the responsibility of future owners to ensure that vegetation management as described
above is undertaken in perpetuity to satisfy the determined BAL rating. Owners are to ensure
that future planting and/or regrowth of vegetation does not encroach into the calculated
setbacks to ensure that the BAL construction rating is effective as intended.

Note that the approval conditions set by Noosa Council include the registration of a vegetation
protection covenant along the southern allotment boundary. No vegetation clearing is
permitted within the bounds of the covenant area.

The Tree Survey Plan has been presented as Figure 1 (refer to Page 2). Individual tree data has
been provided in Table 1 below.

 

 

TREE SURVEY & RETENTION PLAN
400 MCKINNON DRIVE,

COOROIBAH

 

PAGE 1

 

 

 

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Botanical Name Common Name TPZ (m) Height (m) Diameter (m) OS toe Va Location# ATrlaO hy
1 Allocasuarina littoralis black she-oak 350 42 6 5 Driveway footprint | remove
2 Melaleuca quinquinervia_ |broad-leaved paper bark |double leader 580 6.96 16 5 Northern Boundary | remove
3 Melaleuca quinquinervia_|broad-leaved paper bark _|double leader 460 5.52 oO) 7 Northern Boundary | remove
4 Melaleuca quinquinervia__|broad-leaved paper bark 450 5.4 9 6 Inner APZ remove
5 Melaleuca quinquinervia _|broad-leaved paper bark 450 5.4 9 5 Outer APZ retain
6 Melaleuca quinquinervia_|broad-leaved paper bark _|triple leader 640 7.68 8 5 Inner APZ remove
7 Melaleuca quinquinervia__|broad-leaved paper bark 550 6.6 10 5) Outer APZ retain
8 Melaleuca quinquinervia_|broad-leaved paper bark 600 7.2 9 7 Inner APZ remove
9 Melaleuca quinquinervia_|broad-leaved paper bark _|triple leader 460 5.52 9 6 Outer APZ retain
10 Melaleuca quinquinervia_|broad-leaved paper bark _|triple leader 490 5.88 8 6 Inner APZ remove
11 Melaleuca quinquinervia_ |broad-leaved paper bark {double leader 360 4.32 9 3 Outer APZ retain
12 Melaleuca quinquinervia_|broad-leaved paper bark _|triple leader 640 7.68 9 5 Inner APZ remove
13 Melaleuca quinquinervia_|broad-leaved paper bark _|double leader 450 5.4 oO) 5 Inner APZ remove
14 Melaleuca quinquinervia_|broad-leaved paperbark _|quadrupel leader 720 8.64 8 6 Outer APZ retain
15 Eucalyptus racemosa scribbly gum 600 7.2 19 9 Building Envelope | remove
16 Melaleuca quinquinervia__|broad-leaved paper bark 450 5.4 9 8 Inner APZ remove
17 Eucalyptus racemosa scribbly gum double leader 630 7.56 19 7 Outer APZ retain
18 Acacia disparrima hickory wattle double leader 580 6.96 19 8 Inner APZ remove
19 Eucalyptus racemosa scribbly gum 300 3.6 19 4 Building Envelope | remove
20 Melaleuca quinquinervia_|broad-leaved paper bark _|triple leader 670 8.04 16 6 Building Envelope | remove
21 Eucalyptus racemosa scribbly gum 400 48 17 5 Building Envelope | remove
22 Eucalyptus racemosa scribbly gum 450 5.4 16 7 Inner APZ remove
23 Acacia disparrima hickory wattle 600 7.2 8 6 SENESCENT Inner APZ remove
24 Eucalyptus racemosa scribbly gum 600 7.2 19 7 DAMAGED Inner APZ remove
25 Acacia disparrima hickory wattle 500 6 12 7 Outer APZ retain
26 Corymbia intermedia pink bloodwood 400 48 20 6 Outer APZ retain
27 Eucalyptus racemosa scribbly gum 300 3.6 12 5 Outer APZ retain
28 Eucalyptus racemosa scribbly gum 1000 12 19 13 Outer APZ retain
29 Melaleuca quinquinervia_|broad-leaved paper bark _|triple leader 800 9.6 14 12 Outer APZ retain
* DBH of multi-trunked trees is calcuated by the square root of the sum of each stem squared
# Inner APZ = 10m from BLE, Outer APZ = 10-14m from BLE