Main roads western australia


  Information Requested under EPBC 2016/7761



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1.1.4 
Information Requested under EPBC 2016/7761 
In a letter dated 21 December 2016, the Commonwealth Department of the Environment and Energy (DoEE) 
provided an additional information request for preliminary documentation as part of the assessment of EPBC 
2016/7761. The information requested in relation to offsets and how this has been addressed in this document 
is provided in Table 1-1
Table 1-1 : Offset Information Requested under EPBC 2016/7761 
Information Requested 
Response 
In the event that impacts cannot be avoided or 
mitigated, please provide further information on offsets 
to compensate for any significant residual impacts on 
black cockatoos and the Eucalypt Woodlands of the 
Western Australian Wheatbelt TEC, including the: 
 
a)  type of offsets proposed 
Direct offset. Refer to Section 3 
b)  extent to which the proposed offset actions 
correlate to, and adequately compensate for, the 
significant residual impacts of the proposed action 
on the protected matter 
The EPBC Offset Guide has been used to calculate 
offsets required for the proposal. Offsets have been 
developed in accordance with the Offset Principles 
and calculated based on the total extent of clearing 
required for the protected matters.  
Landscaping and rehabilitation will reduce the final 
(residual) impact; however, as landscape designs 
have not been finalised for all contract packages, a 
conservative approach has been adopted and the total 
clearing amount has been used to calculate the 
proposed offsets. Using this approach, it is considered 
that the proposed offsets will correlate to the impacted 
environmental values and adequately compensate the 
final residual impacts to the relevant protected 
matters.  
This is likely to provide a slight nett gain in the overall 
conservation outcome for environmental values being 
offset. 

Walebing to Wubin | 
EPBC2016/7761 | Environmental Offsets Proposal 
 
 
 
 
Great Northern Highway - Muchea to Wubin Upgrade - Stage 2 
CN00-EN01     10/13     GNH-CN00-EN01-RPT-1000     Rev 
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Walebing to Wubin | EPBC2016/7761 | Environmental Offsets Proposal
 
22 
 
Information Requested 
Response 
c)  suitability of the location of any proposed offset 
site for the protected matter. 
Carnaby’s Black Cockatoo 
The offset site is located within the breeding range for 
Carnaby’s Black Cockatoo. It sits within an agricultural 
landscape, as does the impact area. The proposed 
offset site provides additional conservation outcomes 
(protecting the linkage between Lesueur National Park 
and Coomallo Nature Reserve) than possible locations 
closer to the impact site. 
Eucalypt Woodland TEC 
The Department of Environment Regulation (DER) will 
ultimately be responsible for determining the location 
of offset sites funded by the financial contribution 
provided. Funds contributed to the DER offset fund are 
governed by strict policies and guidelines on how 
these funds can be used. The funds must be used in 
acquisition/conservation activities relevant to the 
environmental values the offset funds were provided 
for, thereby providing a level of certainty regarding the 
suitability of offset sites for the protected 
matter/environmental value. It is expected that land 
acquisition would be primarily focussed on the Shires 
of Moora, Dalwallinu, Victoria Plains and Wongan-
Ballidu in order to obtain an offset site within a similar 
landscape to the impact site. 
d)  conservation gain to be achieved by the offset i.e.  
positive management strategies that improve the 
site or averting the future loss, degradation or 
damage of the protected matter 
Carnaby’s Black Cockatoo 
Lot 1, 1395 Banovich Road will be transferred to Parks 
and Wildlife as the management authority, thereby 
increasing the amount of critical habitat for Carnaby’s 
Black Cockatoo within the conservation estate
allowing for management of the site for conservation 
purposes, and enabling its protection in perpetuity.  
Lot 1, 1395 Banovich Road forms a link between 
Lesueur National Park to the north and Coomalloo 
Nature Reserve to the east. Incorporation of the 
property into the conservation estate will protect this 
linkage. 
Eucalypt Woodland TEC 
Purchase of land through the DER Offset Fund will 
result in increased representation of the Eucalypt 
Woodlands of the WA Wheatbelt in the Conservation 
Estate.  
e)  time it will take to achieve the proposed 
conservation gain 
Carnaby’s Black Cockatoo 
The conservation gain will be achieved within a year 
as the site has already been acquired by Main Roads 
WA, is vegetated and provides foraging and breeding 
habitat for Carnaby’s Black Cockatoo. 
Eucalypt Woodland TEC 
The conservation gain will be achieved once the land 
has been acquired. 

Walebing to Wubin | 
EPBC2016/7761 | Environmental Offsets Proposal 
 
 
 
 
Great Northern Highway - Muchea to Wubin Upgrade - Stage 2 
CN00-EN01     10/13     GNH-CN00-EN01-RPT-1000     Rev 
4
 
Walebing to Wubin | EPBC2016/7761 | Environmental Offsets Proposal
 
23 
 
Information Requested 
Response 
f)  level of certainty that the proposed offset will be 
successful 
Carnaby’s Black Cockatoo 
There is a high level of certainty that the offset will be 
successful as recent surveys have identified both 
foraging and breeding habitat across the site with 
actual breeding having been observed in three 
locations within the offset site. As the offset site will be 
managed by Parks and Wildlife and transferred into 
the conservation estate, it will be protected in 
perpetuity. 
Eucalypt Woodland TEC 
There is a high level of certainty that the offset will be 
successful given the offset site will be nominated by 
DER to meet the requirements of this offset proposal, 
be managed by Parks and Wildlife, and transferred 
into the conservation estate. The funds provided by 
this project may be combined with funds from other 
projects required to offset impacts to the Eucalypt 
Woodland TEC allowing DER to acquire/rehabilitate a 
larger area than would be possible by this project 
alone. 
g)  current land tenure of any proposed offset and the 
method of securing and managing the offset for 
the life of the impact. 
Carnaby’s Black Cockatoo:   
The current tenure of Banovich Road property is 
private freehold.  The offset land has been acquired by 
Main Roads WA, thereby changing the tenure to 
Crown land. The land will be transferred to Parks and 
Wildlife who will provide ongoing management of the 
site. 
Eucalypt Woodland TEC: 
The current tenure of any offsets secured will 
generally be private freehold. The offset land will be 
acquired by DER, thereby changing the tenure to 
Crown land under the management authority of Parks 
and Wildlife. 

Walebing to Wubin | 
EPBC2016/7761 | Environmental Offsets Proposal 
 
 
 
 
Great Northern Highway - Muchea to Wubin Upgrade - Stage 2 
CN00-EN01     10/13     GNH-CN00-EN01-RPT-1000     Rev 
4
 
Walebing to Wubin | EPBC2016/7761 | Environmental Offsets Proposal
 
24 
 
2. 
Predicted 
Impacts 
This offset proposal has been based on the total extent of clearing required for the proposal. While many areas 
cleared during construction will be landscaped and revegetated, the extent of revegetation with species suitable 
for recreating habitat for Carnaby’s Black Cockatoo or the Eucalypt Woodlands of the Western Australia 
Wheatbelt ecological community will be dependent on the final landscape plan. As these plans have not been 
developed for all the contract packages which form part of this offset proposal, the residual impact cannot be 
accurately calculated; therefore, and a conservative approach has been adopted by inputting the total clearing 
quantity in the offset calculator with no deduction related to landscaping and revegetating. 
Table 2-1 details the total clearing required in relation to foraging habitat for Carnaby’s Black Cockatoo and 
Eucalypt Woodlands of the Western Australia Wheatbelt TEC. 
Table 2-1 : Clearing Requirements for Relevant Protected Matters 
 
Total Clearing (ha) 
Walebing 
Miling 
Bypass 
Pithara 
Dalwallinu 
to Wubin 
Totals 
Carnaby’s Black Cockatoo Foraging 
Habitat 
8.0 
2.0 
6.0 
14.0 
30.0 
Eucalypt Woodlands of the Western 
Australia Wheatbelt TEC 
11.5 
0.0 
1.0 
2.5 
15.0 

Walebing to Wubin | 
EPBC2016/7761 | Environmental Offsets Proposal 
 
 
 
 
Great Northern Highway - Muchea to Wubin Upgrade - Stage 2 
CN00-EN01     10/13     GNH-CN00-EN01-RPT-1000     Rev 
4
 
Walebing to Wubin | EPBC2016/7761 | Environmental Offsets Proposal
 
25 
 
3. 
Proposed Environmental Offset 
3.1 
Background 
A number of avenues have been pursued in order to identify an appropriate offset strategy for the Walebing to 
Wubin proposal. These investigations can be separated into three streams: acquisition of vegetated land; 
revegetation/rehabilitation of degraded land; and provision of funding. 
Main Roads WA consults with Parks and Wildlife on an as needs basis to identify priority targets for land 
acquisition. Where a specific offset need is identified, these requirements are discussed with Parks and Wildlife 
to identify an appropriate property to acquire. In relation to environmental offsets for this proposal, initial 
discussions with Parks and Wildlife indicated a property at Lot 2039 Hoddy’s Well was a priority for acquisition 
as it contained an area of intact vegetation which abutted onto the existing Clackline Nature Reserve. The 
property is within the mapped occurrence for both Carnaby’s Black Cockatoo and the Eucalypt Woodlands of 
the Western Australian Wheatbelt TEC. 
A biological survey of Lot 2039 Hoddy’s Well was undertaken by AECOM in October 2016 and initial vegetation 
mapping suggested the land may be suitable for offsetting of both Carnaby’s Black Cockatoo habitat and the 
Eucalypt Woodlands of the Western Australian Wheatbelt TEC. Following further interrogation of the data 
recorded during the biological survey and discussions with Parks and Wildlife, it was determined in January 
2017 that the TEC was not present on the property and the vegetation more closely resembled Jarrah forest. 
Given the Eucalypt Woodlands of the Western Australian Wheatbelt TEC is a key environmental value which 
requires offsetting for this proposal, Main Roads WA made the decision that Lot 2039 Hoddy’s Well was not 
able to meet the offset requirements for the proposal and plans to acquire the property were put on hold.  
Meetings with representatives from the Parks and Wildlife regional offices in Northam (Central Wheatbelt 
district) and Jurien Bay (Moora district) were held on 9 and 10 November 2016 respectively. The purpose of 
these meetings was to identify conservation priorities for each district to feed into the offset strategy.  
Within the Central Wheatbelt district acquisition of land, with preference for areas adjacent to existing 
conservation estate, was identified as a priority. Many of the properties within the conservation estate are small 
(less than 100 ha) and disconnected and as such are at higher risk of impacts from edge effects (such as weed 
invasion). Land acquisitions of parcels of land adjacent to the existing conservation estate would reduce the risk 
from edge effects to these properties, increase linkages between properties and improve conservation 
outcomes. 
Priorities with in the Moora district were largely focused on rehabilitation of degraded lands, either within or 
adjacent to the conservation estate. The district has a number of large properties and efforts are generally 
focussed on these in order to improve the condition and conservation outcomes of these properties. Recent 
conservation and management efforts have been focussed on the coastal sandplains. 
Main Roads WA has investigated offset options to satisfy both the conservation priorities of the Parks and 
Wildlife regional offices and DoEE offset requirements. Over the last few years, Main Roads WA has acquired 
offset properties which are larger than the area required to offset the impacts from the specific project which 
initiated the acquisition. These acquisitions have been viewed as “strategic purchases” with a specific area 
within the acquired property defined as the offset site for the project for which the land was acquired, and the 
remainder available for future projects’ offset requirements. Main Roads WA has reviewed these strategic 
purchases and identified at property at Lot 1, 1395 Banovich Road, Hill River which was acquired to offset 
impacts from the Mitchell Freeway Extension (EPBC 2013/7091), and may be suitable for the Walebing to 
Wubin project. This property contains extensive Carnaby’s Black Cockatoo foraging and breeding habitat with 
only a portion of this set aside for the Mitchell Freeway Extension. 

Walebing to Wubin | 
EPBC2016/7761 | Environmental Offsets Proposal 
 
 
 
 
Great Northern Highway - Muchea to Wubin Upgrade - Stage 2 
CN00-EN01     10/13     GNH-CN00-EN01-RPT-1000     Rev 
4
 
Walebing to Wubin | EPBC2016/7761 | Environmental Offsets Proposal
 
26 
 
3.2 
Proposed Offset for Carnaby’s Black Cockatoo 
Main Roads WA proposes to offset the predicted impact to Carnaby’s Black Cockatoo foraging habitat through 
the provision of 130 ha of land at Lot 1, 1395 Banovich Road, Hill River. This property has been acquired by 
Main Roads WA and a portion of the land will be allocated to offsetting impacts from the Mitchell Freeway 
Extension (Figure 3-1). The exact boundaries of the Mitchell Freeway Extension offset site are currently being 
negotiated with DoEE. 
The entirety of the property was surveyed by GHD from 1 to 5 August 2016 (Appendix A). The key findings of 
the survey were (GHD, 2016): 
 
Vegetation condition was mapped mainly Pristine; 
 
fourteen vegetation units were mapped across the property including four resembling conservation 
significant ecological communities; 
 
nine conservation significant flora species were recorded by GHD (2016) including one Threatened flora 
species (Hakea megalosperma). An additional targeted survey by Phoenix in late September 2016 
recorded the presence of the threatened orchid Thelymitra stellata (Phoenix, 2016; Appendix B); 
 
no Weeds of National Significance or Declared Plants were recorded; 
 
seven fauna habitats were mapped as follows: 
 
Wandoo 
Woodlands; 
 
Marri 
Woodlands; 
 
Eucalyptus todtianaBanksia attenuata/menziesii low Open Woodland; 
 
minor drainage lines, seasonally inundated areas and dams; 
 
heathlands on lateritic soils; and 
 
scattered trees of Wandoo and Marri in paddock. 
 
the property contains foraging and breeding habitat for Carnaby’s Black Cockatoo with 10 breeding events 
recorded during the GHD (2016) survey. 
The 130 ha portion of Lot 1, 1395 Banovich Road, Hill River to be assigned to the Walebing to Wubin Project is 
shown on Figure 3-1 and consists of: 
 
13.06 ha of Vegetation Type (VT) 06 Xanthorrhoea spp. and Kingia australis heathland (foraging habitat 
for Carnaby’s Black Cockatoo); 
 
3.96 ha of VT07 Melaleuca rhaphiophylla woodland (foraging habitat for Carnaby’s Black Cockatoo); 
 
24.10 ha of VT09 Corymbia calophylla woodland (breeding and foraging habitat for Carnaby’s Black 
Cockatoo); 
 
6.84 ha of VT10 Eucalyptus wandoo subsp. pulverea woodland (breeding and foraging habitat for 
Carnaby’s Black Cockatoo); 
 
6.84 ha of VT11 Banksia attenuata open heathland (foraging habitat for Carnaby’s Black Cockatoo); 
 
1.18 ha of VT12 mixed heath with isolated clumps of mallee (foraging habitat for Carnaby’s Black 
Cockatoo); and 
 
3.14 ha of VT13 Melaleuca ?concreta heathland (foraging habitat for Carnaby’s Black Cockatoo). 
 
 

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VT10
VT07
VT14
VT01
VT02
VT03
VT04
VT05
VT06
VT06
VT06
VT08
VT09
VT09
VT10
VT06
VT06
VT10
VT06
VT09
VT11
VT12
VT07
VT06
VT06
VT13
VT13
VT07
VT09
VT06
VT07
VT09
VT10
VT09
VT09
VT10
VT06
VT03
VT09
VT05
VT05
VT07
VT07
VT10
VT08
VT08
VT09
VT09
VT05
VT06
VT10
VT05
VT05
VT09
VT05
VT05
VT10
VT09
VT05
VT05
VT12
VT12
VT12
VT12
VT12
VT09
VT09
VT10
VT09
VT09
VT09
VT10
VT09
VT09
Jurien
 Rd
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Bla
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rro
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Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus
DS, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo,
and the GIS User Community
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330000
332000
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500
1,000
Metres
Legend
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)
Actual 
Black 
Cockato o  
Breedi
n g  
T ree 
(
GHD,
 
12/
09/
2016)
!
(
Suspected 
Black 
Cockato o  
Breedi
n g  
T ree 
(
GHD,
 
12/
09/
2016)
Road
Mi
tchell 
Fwy 
EPBC 
Of
f
set 
Area 
(
Stage 
1,
 
680.
74ha)
Pro po sed 
Carn aby’s 
Black 
Cockato o  
Of
f
set 
Area 
(130ha)
Lot 

Bano vi
ch 
Rd,
 
Hi
ll 
Ri
ver 
(1995.
18ha)
Black 
Cockato o  
Breedi
n g  
Habi
tat 
(
GHD,
 
12/
09/
2016)
Cadastral 
Boun dary
MXD Location: \\Jacobs.com\PERProjects\PBIF\Projects\PB50732\Technical\GIS\ArcMap\Environmental\CN00\GNH-CN00-EN01-GIS-0049-C.mxd
Task No
GNH-1466
Drawing No
Issue
GNH-CN00-EN01-GIS-0049
C
Drawing Status / Other
Draft / Other Info
Scale at A4
1:35,000
Project
Client
Main Roads Western Australia
Great Northern Highway
Muchea to Wubin Upgrade Stage 2
Date
By
Chkd
Appd
5/05/2017
BS
SR
TJ
Figure 3-1: Lot 1 Banovich Rd
Property CBC Breeding &
Foraging Areas
Joint Venture Partners:
Arup Pty Ltd
Level 14  Exchange Tower
2 The Esplanade
Perth WA 6000
Tel +61 8 9327 8300 Fax +61 8 9481 1334
www.arup.com
Jacobs Group (Australia) Pty Ltd
Durack Centre, 263 Adelaide Terrace
Perth WA 6000
Tel +61 8 9469 4400 Fax +61 8 9469 4488
www.jacobs.com
© Main Roads Western Australia
!
°
Data Source: Landgate, Main Roads WA
Coordinate System: GDA 1994 MGA Zone 50
Vegetati
o n  
T ype 
(
GHD,
 
12/
09/
2016)
Code 

Descri
pti
o n
VT01 
-Allocasuarina microstachya 
h eath land
VT02 
-Petrophile chrysantha 
h eath land
VT03 
-Melaleuca preissiana 
o pen 
wo o dland
VT04 
-Melaleuca platycalyx 
h eath land 
and 
Eucalyptus wandoo 
wo o dland
VT05 
-Eucalyptus todtiana, Banksia attenuata 
and 
B. menziesii 
wo o dland
VT06 
-Xanthorrhoea 
and 
Kingia 
h eath land
VT07 
-Melaleuca rhaphiophylla 
wo o dland
VT08 
-Ecdeiocolea monostachya 
h erbland
VT09 
-Corymbia calophylla 
wo o dland
VT10 
-Eucalyptus wandoo 
wo o dland
VT11 
-
Banksia attenuata 
o pen 
h eathland
VT12 
-Mi
xed 
h eath  
w i
th  
i
so lated 
clum ps 
o f
 
m allee
VT13 
-Melaleuca ?concreta 
h eath land
VT14 
-Pasture 
wi
th  
em erg ent 
trees
!
!
PERTH
JURIEN
G
re
at
No
rth
er
n
Hw
y
Lot 1 Banovich Rd
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