Main roads western australia



Yüklə 29.22 Mb.
Pdf просмотр
səhifə3/31
tarix24.08.2017
ölçüsü29.22 Mb.
1   2   3   4   5   6   7   8   9   ...   31

 
3.3 
Proposed Offset for Eucalypt Woodlands of the Western Australian Wheatbelt 
TEC 
Main Roads WA is proposing a financial contribution of $78,489.00 to the DER offset fund. Funds will be 
transferred to the DER for the purpose of (a) acquiring land which meets the offset requirements; (b) 
undertaking rehabilitation activities which result in improved condition or increased area of occurrence for the 
Eucalypt Woodlands of the WA Wheatbelt TEC; or (c) undertaking other conservation and management 
activities (beyond “business as usual”) in relation to the TEC on land currently managed by the State for 
conservation. The financial contribution has been determined based on the following criteria: 
 
Land acquired is vegetated and not in need of revegetation/rehabilitation in order to meet offset 
requirements; and 
 
The market valuation of the vegetated land based on valuation obtained from the Valuer-General (on a 
$/ha basis) for unimproved (vegetated) land within the Shire of Moora. As the Valuer-General’s market 
valuation ($/ha) of vegetated land differs according to the size of the land parcel, the valuation of the 
closest ‘standard parcels’ of land (i.e. 10, 50, 100, 200 or 500 ha) was used to determine the market 
valuation of the offset area. 
Inputs used to calculate the area required to offset the predicted impacts and the justifications for these are 
detailed in Section 4
In a meeting with DER on 21 March 2017, the possibility of a financial contribution to the DER offset fund for the 
purposes of offsetting impacts to the Eucalypt Woodlands of the Western Australian Wheatbelt TEC was 
discussed. It was confirmed by DER that the offset fund can be used for this purpose. Additionally, impacts to 
the TEC would be considered as part of the assessment of the Native Vegetation Clearing Permit application 
(CPS 7231/1) under Clearing Principle D with offsets likely to be required for residual impacts to the TEC. The 
proposed financial contribution offset for the TEC will be subject to review and approval by DER through the 
Native Vegetation Clearing Permit assessment process. An Offsets Proposal to support CPS 7231/1 is currently 
in preparation. 
It is expected that the funds transferred to DER will be used to acquire, rehabilitate or otherwise manage land in 
the Shires of Moora, Dalwallinu, Victoria Plains or Wongan-Ballidu, though DER, in consultation with Parks and 
Wildlife, will be responsible for the final decision on the location of the offset site. The advantage of the DER 
offset fund comes from the ability to combine financial contributions from a number of projects with similar offset 
requirements, allowing DER to acquire, rehabilitate or manage much larger offset sites than would be possible 
for each project individually. This may result in the chosen offset site being located further from the impact site 
(that is, outside of the shires mentioned above) however this is balanced by the environmental benefits inherent 
in larger land areas, for example better patch area to perimeter ratios and decreased edge effects such as weed 
encroachment. 
Main Roads WA has been in consultation with Parks and Wildlife regarding potential offset sites containing the 
Eucalypt Woodlands of the Western Australian Wheatbelt TEC.  A property has been identified near Wongan 
Hills which may be suitable as an offset. Ecological surveys are required to confirm the TEC is present and that 
the site is suitable for use as an 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 
4
 
Walebing to Wubin | EPBC2016/7761 | Environmental Offsets Proposal
 
29 
 
4. 
Offset Guide Inputs and Justification 
Table 4-1 provides the inputs and justifications in relation to Carnaby’s Black Cockatoo. Table 4-2 provides the 
inputs for the Eucalypt Woodland of the Western Australian Wheatbelt. The completed EPBC Offset Guide for 
each environmental value is provided in Appendix C
Table 4-1 : Offsets Guide Inputs and Justifications for Carnaby’s Black Cockatoo 
Offset Guide Item 
Input Value 
Justification 
EPBC Act Status 
Endangered 
Current EPBC Act listing 
Impact Area 
30 ha 
Total amount of clearing required for the proposal. This area is 
larger than the ultimate residual impact as some of this area 
will be landscaped and revegetated. As landscape designs 
have not been finalised for all contract packages under this 
offset proposal, a conservative approach to offsets has been 
taken and the total clearing amount has been used to 
calculate the offset required, rather than the predicted residual 
impact. 
Quality of Impact Area 

Vegetation condition of the foraging and potential breeding 
habitat to be cleared is degraded – good, which would 
correspond to a quality rating of 3. Some habitat to be cleared 
is adjacent to known nesting trees which results in this habitat 
having a higher value as it is defined as critical habitat. To 
account for this and the presence of an Important Bird Area 
adjacent to the Walebing section, the quality ranting has been 
increased to 6. 
Time over which Loss is 
averted 
20 years 
Transfer of the offset site to Park and Wildlife will provide 
protection and management in perpetuity. 
Time until ecological 
benefit 
1 year 
As the acquired land is vegetated and will be incorporated into 
the conservation estate once a MoU is agreed with Parks and 
Wildlife, the ecological benefit will be realized within 1 year. 
Start Area 
130 ha 
This area achieves 100% direct offset, based on the other 
inputs used 
Start Quality 

The vegetation of the offset site is in Pristine or Excellent 
condition and provides quality foraging and breeding habitat 
for Carnaby’s Black Cockatoo, with breeding having been 
recorded across the property. The property also provides 
connectivity between Lesure National Park and Coomallo 
Nature Reserve. 
Future Quality without 
Offset 

There is a risk that, should the ultimately acquired site not be 
used for this offset, additional disturbances could occur. This 
could include disturbances include grazing by stock or clearing 
for additional cropping or pasture area. 
Future Quality with offset 

The quality of the habitat within the offset site is already high, 
given that most of the site is in Pristine or Excellent condition 
and breeding has been recorded at Lot 1, 1395 Banovich 
Road. Therefore, the habitat does not currently require 
rehabilitation or revegetation. The management of the site by 
Parks and Wildlife will provide active management to maintain 
the viability of Carnaby’s Black Cockatoo habitat 

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
 
30 
 
Offset Guide Item 
Input Value 
Justification 
Risk of Loss (%) without 
offset 
15% 
Prior to purchase by Main Roads WA the property was used 
for agriculatural purposes. Should the site not have been 
acquired, there is a risk of disturbances such as grazing by 
stock and clearing for additional cropping or pasture area. 
As noted by GHD (2016) 15% is the standard risk of loss for 
the Gin Gin region area used by DoEE during the previous 
assessment of other offset sites, in the absence of any specific 
threats to a parcel of land. 
Risk of Loss (%) with offset  2% 
As the offset site will be transferred to Parks and Wildlife for 
management and incorporation into the conservation estate, 
there is a high confidence level that the environmental values 
being offset will not be lost. 
Confidence in result 
(averted risk) 
80% 
As the offset site will be transferred to Park and Wildlife for 
management and incorporated into the conservation estate, 
there is a high level of confidence that the averted risk will be 
realized. 
Confidence in result 
(Change in habitat quality) 
80% 
As the site will be incorporated into the conservation estate, 
there is a high level of confidence that the change in the 
quality score will be realized. 
Table 4-2 : Offsets Guide Inputs and Justifications for Eucalypt Woodlands of the WA Wheatbelt  
Offset Guide Item 
Input Value 
Justification 
EPBC Act Status 
Critically 
Endangered 
Current EPBC Act listing 
Impact Area 
15 ha 
Total amount of clearing required for the proposal. This area is 
larger than the ultimate residual impact as some of this area 
will be landscaped and revegetated. As landscape designs 
have not been finalised for all contract packages under this 
offset proposal, a conservative approach to offsets has been 
adopted and the total clearing amount has been used to 
calculate the offset required, rather than estimating the likely 
residual impact. 
Quality of Impact Area 

The majority of the Eucalypt Woodlands impacted are in a 
degraded condition as assessed using the Keighery 
vegetation condition scale. This is considered to be equivalent 
to an offsets guide condition rating of 2. There are however, 
some areas of good condition vegetation and minimal areas of 
Very good condition vegetation that will be cleared. As such, a 
quality rating of 3 has been used for this offset calculation. 
This is considered to be equivalent to a vegetation condition 
rating of degraded – good. 
Time over which Loss is 
averted 
20 years 
The transfer of the offset site to Parks and Wildlife will provide 
protection and management in perpetuity. 
Time until ecological 
benefit 
1 year 
As the acquired land is vegetated and will be incorporated into 
the conservation estate once a MoU is agreed with Parks and 
Wildlife, the ecological benefit will be realized within 1 year 
Start Area 
51 ha 
This area achieves 100% direct offset, based on the other 
inputs used 

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
 
31 
 
Offset Guide Item 
Input Value 
Justification 
Start Quality 

Intact remnants of native vegetation within the Wheatbelt not 
already within the conservation estate are likely to have some 
level of degradation. To reflect this, a start value of 5, which is 
equivalent to Good – Very Good on the Keighery vegetation 
condition scale, has been selected. 
Future Quality without 
Offset 

There is a risk that, should the ultimately acquired site not be 
used for this offset, additional disturbances could occur. This 
could include disturbances include grazing by stock, clearing 
for additional cropping or pasture area or impacts from dryland 
salinity. 
Future Quality with offset 

It is expected that funds would primarily be spend on 
acquisition of land. Funds may also be spend on rehabilitation 
of a site, however as there is no certainty in regards to this it 
has not been considered in the calculation of the input value. 
Risk of Loss (%) without 
offset 
30% 
There is a risk that, should the ultimately acquired site not be 
used for this offset, additional disturbances could occur. Given 
land is likely to be purchased within the Wheatbelt region; 
additional disturbances include grazing by stock and clearing 
for additional cropping or pasture area. Dryland salinity may 
also be a factor which could result in the loss of the 
environmental values of the site.  
Risk of Loss (%) with offset  5% 
As the offset site will be transferred to Parks and Wildlife for 
management and incorporation into the conservation estate, 
there is a 95% confidence level that the environmental values 
being offset will not be lost (i.e. a 5% risk that the values will 
be lost). 
Confidence in result 
(averted risk) 
90% 
As the offset site will be transferred to Park and Wildlife for 
management and incorporated into the conservation estate, 
there is a high level of confidence that the averted risk will be 
realized. 
Confidence in result 
(Change in habitat quality) 
90% 
Incorporation of the land into the conservation estate provides 
a high degree of confidence that the quality of the offset will 
be, at a minimum, maintained.  
Cost 
$78,489.00 
Market valuation of 51 ha of vegetated land based on the 
value per hectare valuation obtained from the Valuer-General 
of unimproved (vegetated) land within the Shire of Moora 
(50 ha standard land parcel). 

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
 
32 
 
5.  Conclusions 
Main Roads WA proposes the following offset for impacts to Carnaby’s Black Cockatoo habitat and the Eucalypt 
Woodlands of the Western Australian Wheatbelt TEC: 
 
130 ha of vegetated land at Lot 1, 1395 Banovich Road, Hill River. This offset site provides foraging and 
breeding habitat for Carnaby’s Black Cockatoo; and 
 
Financial contribution to the DER Offset Fund in the amount of $78,489.00. These funds will be used for 
either the acquisition of property vegetated with the TEC, or for conservation and management activities 
(beyond “business as usual”) in relation to the TEC on land currently managed by the State for 
conservation. 
The offset strategies proposed will provide adequate and commensurate offsetting of the impacted 
environmental values. A conservative approach has been adopted in calculating the offset requirements by 
using the total amount of clearing required, rather than the residual impact following landscaping and 
revegetation activities. 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 
Appendix A 
 
 
 
 
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
 
33 
 
Appendix A. Hill River Offset Property Biological Survey 
(GHD, 2016) 
 

 
 
This page intentionally blank 

 
 
 
 
 
 
 
 
 
 
 
 
Main Roads Western Australia 
Hill River Offset Property 
Biological Survey 
 
September 2016 

 
GHD | Report for Main Roads Western Australia - Hill River Offset Property, 61/34834 | i 
Executive summary 
Introduction 
Main Roads Western Australia is currently constructing Stage 1 of the Mitchell Freeway 
Extension. Stage 1 of the project was referred to the DotE under the EPBC Act and was 
determined to be a 

controlled action

 due to the likely significant impacts on Car
naby’s Black 
Cockatoo (Calyptorhynchus latirostris). The impact is clearing of 88.7 ha of native vegetation 
that provides known and potential foraging, roosting and breeding habitat for Carnaby’s Black 
Cockatoo. 
Condition 3 of EPBC approval 2013/7091 stipulated that Main Roads must provide an offset 
property with suitable environmental values to be transferred to the Conservation and Parks 
Commission of Western Australian and managed by Department of Parks and Wildlife, to be 
reserved for conservation in perpetuity.  
Main Roads has acquired an offset property (Lot 1, 1395 Banovich Road, Hill River), which is 
the subject of this report. A biological survey (‘Ecological Values Assessment’), including a 
Black Cockatoo habitat assessment to determine the environmental values of the property was 
undertaken. The property (survey area) consists of 1,993 ha.  
  
Key results 

 
Four vegetation types were considered to resemble conservation significant ecological 
communities, including: 

  VT01 is associated with the Lesueur-Coomallo Floristic Community D1 TEC, listed as 
Critically Endangered under the WC Act 

  VT03 is associated with the Lesueur-Coomallo Floristic Community M2 (Melaleuca 
preissiana woodland) Priority 1 PEC 

  VT04 is associated with the Lesueur-Coomallo Floristic Community DFGH Priority 1 
PEC, in particular ‘D’ heath and woodlands on gravelly hills and slopes
 

  VT02 is associated with the Petrophile chrysantha low heath on Lesueur dissected 
uplands (Gp200-170) Priority 2 PEC 

 
Fourteen vegetation types were described from the survey area. 1746.81 ha of native 
vegetation, ranging from Pristine to Completely Degraded condition 

 
The native vegetation within the survey area is considered significant vegetation as 
defined by the EPA and DPaW (2015) as the majority of the survey area is in a Pristine 
condition that is a refuge for a number of conservation significant flora that occur 
throughout the survey area in a variety of vegetation types 

 
The survey area contained a diverse range of flora with 344 taxa (including subspecies 
and varieties) representing 51 families and 149 genera recorded from the survey area  

 
Nine conservation significant flora were recorded from the survey area including: 

  Hakea megalosperma (listed as Vulnerable under both the EPBC Act and WC Act) 

  Acacia retrorsa (Priority 2) 

  Grevillea delta (Priority 2) 

  Thelymitra variegata (Priority 2) 

  Hensmania stoniella (Priority 3) 

 
ii | GHD | Report for Main Roads Western Australia - Hill River Offset Property, 61/34834  

  Lepidobolus quadratus (Priority 3) 

  Stylidium ?hymenocraspedum (Priority 3) 

  Stylidium ?torticarpum (Priority 3) 

  Hakea neurophylla (Priority 4). 

 
The Likelihood of Occurrence assessment post-field survey concluded that seven taxa 
are known to occur, two are likely to occur, 152 may possibly occur and the remaining 29 
taxa are unlikely or highly unlikely to occur within the survey area. The large number of 
conservation significant taxa that are considered possibly to occur is due to the survey 
area comprising of a varied landscape with a range of soils and landforms that align with 
the habitat considered suitable for the species 

 
No introduced species listed as a Declared Pest under Section 22 of the BAM Act or as a 
Weed of National Significance were recorded within the survey area 

 
Seven fauna habitat types were recorded during the field survey, which broadly aligned 
with the vegetation types and include, Wandoo Woodlands, Marri Woodland, Eucalyptus 
todtianaBanksia attenuata/menziesii low Open Woodland, Minor Drainage lines and 
Seasonally Inundated Areas and Dams, Heathlands on Sandy Soils, Heathlands on 
Lateritic Soils and Scattered Trees of Wandoo and Marri in Paddock 

 
One hundred and seven fauna species were recorded within or in close proximity to the 
survey area including 72 birds, 18 mammals (6 introduced), 12 reptiles and five frogs  

 
The EPBC Act listed Carnaby’s Black
 Cockatoo (Calyptorhynchus latirostris), 
Endangered Schedule 1 and Priority 4 listed Western Brush Wallaby (Macropus irma
were recorded during the survey 

 
The Likelihood of Occurrence assessment post-field survey concluded that six additional 
conservation significant fauna taxa may likely occur within the survey area and these are: 
Western Ground Parrot (Pezoporus flaviventris), Chuditch (Dasyurus geoffroii), Peregrine 
Falcon (Falco peregrinus), Woma Python (Aspidites ramsayi SW pop.), Southern Brown 
Bandicoot (Isoodon obesulus subsp. fusciventer) and Black-striped Snake (Neelaps 
calonotos). Some of these species are considered rare in Western Australia, however few 
fauna studies have occurred in this region and their presence could not be excluded. 
Summary of offset calculator inputs 
The EPBC Act Offsets Assessment Guide has been used to determine the required offsets for 
impacts to Carnaby’s Black Cockatoo for Stage 1 of the Mitchell Freeway Extension, Burns 
Beach to Hester Avenue, and the geotechnical trace lines. A summary of the inputs into the 
Offsets Calculator section of the EPBC Act Offsets Assessment Guide for the proposed offset 
site (the survey area) is provided in the table below.  
The outcome accounts for greater than 100% (106.57%) direct offset for the impact of clearing 
88.7 
ha of Carnaby’s Black Cockatoo habitat for Stage 1 of the project.
  
Summary of inputs into Offset Calculator 
Offset calculator attribute 
Input value 
Каталог: Documents
Documents -> Исследование диагностических моделей по Пону и Коркхаузу
Documents -> 3 пародонтологическая хирургия
Documents -> Hemoglobinin yenidoğanda yapim azliğina bağli anemiler
Documents -> Q ə r a r Azərbaycan Respublikası adından
Documents -> Ubutumire uniib iratumiye abantu, imigwi y'abantu canke amashirahamwe bose bipfuza gushikiriza inkuru hamwe/canke ivyandiko bijanye n'ihonyangwa ry'agateka ka zina muntu hamwe n'ayandi mabi yose vyakozwe I Burundi guhera mu kwezi kwa Ndamukiza
Documents -> Videotherapy Video: Cool Runnings Sixth Grade
Documents -> Guidelines on methods for calculating contributions to dgs
Documents -> Document Outline form monthly ret cont
Documents -> Şİrvan şƏHƏr məRKƏZLƏŞDİRİLMİŞ Kİtabxana sistemi
Documents -> İnsan hüquq müdafiəçilərinin vəziyyəti üzrə Xüsusi Məruzəçi


Поделитесь с Вашими друзьями:
1   2   3   4   5   6   7   8   9   ...   31


Verilənlər bazası müəlliflik hüququ ilə müdafiə olunur ©azkurs.org 2019
rəhbərliyinə müraciət

    Ana səhifə