NSW Department of Justice
Wellington Correctional Centre - 400 Bed Temporary Correctional Accommodation
Review of Environmental Factors
July 2016
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637 | i
Declaration
This Review of Environmental Factors (REF) has been prepared by GHD Pty Ltd and presents
an assessment of potential impacts that may result from activities associated with the new 400
bed temporary correctional accommodation facility proposed at the site of the existing
Wellington Correctional Centre (the proposal).
The NSW Department of Justice (DJ) is a public authority and is the determining authority as
defined in the Environmental Planning and Assessment Act 1979 (EP&A Act). The proposal
satisfies the definition of an activity under the Act and as such DJ must assess and consider the
environmental impacts of the proposal before determining whether to proceed.
This REF has been prepared in accordance with sections 111 and 112 of the EP&A Act and
clause 228 of the Environmental Planning and Assessment Regulation 2000 (EP&A
Regulation). This REF provides a true and fair assessment of the proposed activity in relation to
its likely effects on the environment. It addresses to the fullest extent possible, all matters
affecting or likely to affect the environment as a result of the proposed activity.
On the basis of the information presented in this REF it is concluded that:
1. The proposal is not likely to have a significant impact on the environment and therefore
an Environmental Impact Statement is not required.
2. The proposal is not likely to significantly affect threatened species, populations, ecological
communities, or critical habitat. Therefore a species impact statement is not required.
3. The proposal is not likely to affect any Commonwealth land, is not being carried out on
Commonwealth land, or significantly affect any Matters of National Environmental
Significance.
Subject to implementation of the measures to avoid, minimise or manage the environmental
impacts listed in this REF, the proposal is recommended for approval.
Name of author and
qualifications
Ashleigh Cox, BRTP (Hons)
Designation Senior Environmental Planner
Name of reviewer and
qualifications
Monique Roser, BTP (Hons)
Designation Principal Environmental Planner
Organisation GHD Pty Ltd
Signature
Date 22/07/16
ii | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637
Verification and determination
Verifier
I have examined this REF and the declaration by the author Ashleigh Cox and accept the report
on behalf of the NSW Department of Justice.
Name Penny Goldin
Designation Team leader and environmental planner
Organisation NSW Water Solutions, NSW Public Works
Signature
Determination
I determine that the proposal is approved and may proceed.
Name Andrew Cappie-Wood
Designation Secretary
Organisation Department of Justice
Signature
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637 | iii
Executive summary
The Wellington Correctional Centre (the existing facility) is operated by Corrective Services
NSW (CSNSW) and accommodates a maximum operational capacity of 703 inmates including
maximum, medium and minimum security male inmates and minimum security female inmates.
It is located on the Mudgee-Goolma Road, Wellington NSW (the site), approximately 358
kilometres north-west of Sydney.
The unprecedented and unanticipated rise in inmate numbers in recent years, which has
exceeded previous inmate population projections, has placed demand pressures on the
correctional system. This has resulted in a number of inefficiencies and operational challenges.
The Department of Justice (DJ) is therefore proposing to construct and operate a 400 bed
temporary correctional accommodation facility with associated infrastructure and services at
the site (referred to as ‘the proposal’).
The proposal would be undertaken within a 12 hectare area located 340 metres south-west of
the existing facility (referred to as ‘the study area’). It would include:
1 x 400 bed temporary correctional facility accommodation
Ancillary buildings
Access roads and services.
The proposal would consist of portal frame buildings to enable construction within a short
timeframe, commencing in August 2016.
The location and footprint of the proposal is shown on Figure 1-1 and the site plans provided in
Appendix B.
Planning framework
The proposed works are permissible without consent pursuant to clause 26 of State
Environmental Planning Policy (Infrastructure) 2007 (Infrastructure SEPP). The Infrastructure
SEPP provides that development for the purposes of alternations of, or additions to, a
correctional centre, may be carried out by or on behalf of a public authority without consent on
land within a prescribed zone, if the development is in connection with an existing correctional
centre.
This Review of Environmental Factors (REF) has been prepared to assess the potential
environmental impacts of the proposed works in accordance with the requirements of Part 5 of
the Environmental Planning and Assessment Act 1979 (EP&A Act).
Environmental impacts and mitigation
A number of potential environmental impacts associated with the construction and operation of
the proposal have been identified and are summarised below.
The impact assessment has identified that the proposal has the potential to result in limited
short term impacts on the amenity of the surrounding community and/or users of adjoining areas
during construction. Potential impacts, which include noise and vibration, traffic and access, air
quality, and visual impacts, are assessed in sections 6.2, 6.3, 6.4 and 6.11 respectively. No
significant impacts are identified.
iv | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637
During standard and outside of standard recommended hours the noise affected construction
and demolition noise management levels are predicted to be exceeded during some stages.
However, maximum internal construction noise levels at all residential receivers are likely to be
below the Road Noise Policy criteria and therefore, sleep disturbance is unlikely to occur. Noise
emissions from the proposal during operation are unlikely to exceed the relevant noise emission
criteria at any time of the day, evening or night-time.
Construction of the proposal may impact local air quality through the generation of dust by
excavation, construction vehicles driving over exposed soils and wind blowing over stockpiles.
Dust impacts have the potential to impact on the amenity of those occupying nearby residential
properties. The operation of construction plant and equipment would also result in additional
exhaust emissions in the area.
Operation of the proposal would not impact topography, geology, soils or water quality at the
site. Aside from the building areas, the site would be covered in gravel or landscaped where
required. No erosion or sedimentation impacts are anticipated during operation.
Flora and fauna field surveys undertaken for the study area identified a number of species and
one ecological community (Box-Gum Woodland) listed under the EPBC Act and/or TSC Act with
the potential to occur in the study area. It is unlikely that the proposal would affect any of these
biota primarily due to the degraded nature of the habitat proposed to be removed.
Construction and operation of the proposal would not result in any impacts to listed/known
Aboriginal or non-Aboriginal heritage items. Mitigation measures would be implemented to
ensure heritage listed items within proximity to the works are not impacted during construction.
The potential socio-economic risks associated with the proposal for inmates at the existing
facility include stigma and impact to town’s reputation, fear about impact on local crime, traffic
and assess and impact on community and social infrastructure. Given the temporary nature of
the facility and its anticipated life span of 5-7 years all risks and benefits associated with the
proposal are also temporary.
Prior to construction commencing, a construction environmental management plan (CEMP)
would be developed by the construction contractor, to detail how the environmental
management of the proposal would be implemented.
The demolition of the proposal would also be undertaken in accordance with a demolition
environmental management plan prepared by the contractor and approved by DJ prior to
commencement of works. The environmental management plan would document the
mechanisms for achieving compliance with the commitments made in this REF. The
environmental management plan would also outline, but not be limited to, appropriate measures
for the re-use of existing structures and general site rehabilitation.
Summary
Pursuant to the provisions of the EP&A Act, and Environmental Planning and Assessment
Regulation 2000 (EP&A Regulation), an environmental assessment of the proposal has been
undertaken. Consideration has been given to the likely impact of the activity on the environment,
having regard to all relevant factors. On the basis of the information presented in this REF, it is
concluded that by adopting the safeguards identified in this assessment it is unlikely that there
would be significant adverse environmental impacts associated with the proposal.
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637 | v
Table of contents
1. Introduction ............................................................................................................................... 1
1.1 Background and purpose of the proposal ......................................................................... 1
1.2 Proposal summary .......................................................................................................... 1
1.3 Proposal objectives ......................................................................................................... 1
1.4 Location and land use ..................................................................................................... 1
1.5 Land ownership ............................................................................................................... 2
1.6 Purpose of this report ...................................................................................................... 2
1.7 Scope and limitations ...................................................................................................... 2
2. Statutory considerations ............................................................................................................ 5
2.1 Environmental Planning and Assessment Act 1979 ......................................................... 5
2.2 Environmental planning instruments ................................................................................ 5
2.3 Other legislative considerations ....................................................................................... 7
2.4 Summary of approvals and consents ............................................................................... 9
2.5 Consultation .................................................................................................................... 9
3. Need for the project ................................................................................................................. 13
3.1 Existing facility ............................................................................................................... 13
3.2 Project justification ........................................................................................................ 13
4. Site selection........................................................................................................................... 14
4.1 Introduction ................................................................................................................... 14
4.2 Site selection development ............................................................................................ 14
4.3 Site selection criteria ..................................................................................................... 14
4.4 Option evaluation .......................................................................................................... 15
5. Description of the proposal ...................................................................................................... 18
5.1 The proposal ................................................................................................................. 18
5.2 Construction and demolition works ................................................................................ 19
6. Environmental assessment...................................................................................................... 22
6.1 Location and land use ................................................................................................... 22
6.2 Noise and vibration ........................................................................................................ 23
6.3 Traffic and access ......................................................................................................... 35
6.4 Air quality ...................................................................................................................... 47
6.5 Soils, erosion and water quality ..................................................................................... 48
6.6 Flora and Fauna ............................................................................................................ 50
6.7 Heritage ........................................................................................................................ 62
6.8 Site contamination ......................................................................................................... 64
6.9 Waste management ...................................................................................................... 65
6.10 Bushfire hazard ............................................................................................................. 66
6.11 Visual ............................................................................................................................ 68
6.12 Socio-economic ............................................................................................................. 69
vi | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637
6.13 Mitigation....................................................................................................................... 76
7. Environmental management .................................................................................................... 78
7.1 Environmental management plans ................................................................................. 78
7.2 Environmental management measures .......................................................................... 79
8. Conclusion .............................................................................................................................. 89
8.1 Justification of the proposal ........................................................................................... 89
8.2 Summary of REF findings .............................................................................................. 89
8.3 Conclusion .................................................................................................................... 89
8.4 Recommendation .......................................................................................................... 90
9. References ............................................................................................................................. 91
Table index
Table 2-1 Consideration of relevant legislation ................................................................................ 7
Table 2-2 EPBC Act protected matters search results ..................................................................... 8
Table 2-3 Summary of approvals and consents for the proposal ...................................................... 9
Table 2-4 Consultation requirements under clauses 13-16 of the Infrastructure SEPP ..................... 9
Table 4-1 Sites considered unsuitable to construct proposal .......................................................... 15
Table 4-2 Sites considered suitable to construct proposal .............................................................. 15
Table 4-3 Site evaluation ............................................................................................................... 15
Table 6-1 Receiver IDs and locations ............................................................................................ 23
Table 6-2 Construction noise management levels at residences .................................................... 26
Table 6-3 Construction traffic noise criteria, LAeq(period, dB(A) .......................................................... 27
Table 6-4 Construction scenarios and equipment .......................................................................... 28
Table 6-5 Construction equipment noise levels .............................................................................. 30
Table 6-6 Predicted construction noise levels at representative sensitive receivers during
standard construction hours, dBA .................................................................................. 30
Table 6-7 Predicted construction noise levels at representative sensitive receivers outside
of standard construction hours, dBA .............................................................................. 31
Table 6-8 Road noise policy criteria ............................................................................................... 33
Table 6-9 Predicted operational and road traffic noise levels at representative sensitive
receivers, dBA ............................................................................................................... 34
Table 6-10 Estimated traffic volumes 2016 ...................................................................................... 37
Table 6-11 Level of service criteria for intersections ........................................................................ 37
Table 6-12 Existing 2016 SIDRA intersection performance .............................................................. 38
Table 6-13 Forecast construction traffic generation ......................................................................... 41
Table 6-14 2016 Construction phase intersection performance ........................................................ 41
Table 6-15 Forecast traffic movements............................................................................................ 41
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637 | vii
Table 6-16 Forecast daily and peak hour traffic generation – weekday ............................................ 42
Table 6-17 Forecast daily and peak hour traffic generation – weekend ............................................ 43
Table 6-18 SIDRA intersection performance 2023 scenarios ........................................................... 44
Table 6-19 Sight distance requirements .......................................................................................... 45
Table 6-20 Minimum number of required parking spaces ................................................................. 45
Table 6-21 Survey effort for ecological assessment ......................................................................... 51
Table 6-22 Noxious weeds in the study area ................................................................................... 54
Table 6-23 Potential socio economic risks associated with construction and demolition ................... 73
Table 6-24 Potential socio economic risks associated with operational of the proposal .................... 74
Table 7-1 CEMP structure ............................................................................................................. 78
Figure index
Figure 1-1 Site location ................................................................................................................... 3
Figure 1-2 Site features ................................................................................................................... 4
Figure 2-1 Site zoning ................................................................................................................... 12
Figure 6-1 Receiver locations ........................................................................................................ 24
Figure 6-2 Crash locations ............................................................................................................ 39
Figure 6-3 Construction traffic routes ............................................................................................. 40
Figure 6-4 Proposed carpark layout ............................................................................................... 46
Figure 6-5 Flora surveys and vegetation communities ................................................................... 56
Figure 6-6 Kurrajong tree in the proposal site ................................................................................ 57
Figure 6-7 Introduced groundcover vegetation and peppercorn trees in the proposal site ............... 58
Figure 6-8 Derived grassland north of the proposal site ................................................................. 58
Figure 6-9 Bushfire hazard ............................................................................................................ 66
Figure 6-10 Recorded incidents of selected offences, 2010 .............................................................. 73
Appendices
Appendix A – Clause 228 factors and ecologically sustainable development considerations
under the EP&A Act
Appendix B – Preliminary design plans
Appendix C – ISEPP consultation letters
Appendix D – SIDRA intersection results
Appendix E – Flora and fauna species lists
Appendix F – Flora and fauna likelihood of occurrence
viii | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637
Appendix G – Heritage impact assessment
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637 | ix
List of abbreviations
Abbreviation Definition
AADT Annual Average Daily Traffic
ABS Australian Bureau of Statistics
AHIMS Aboriginal Heritage Information Management System
ATSI Aboriginal and Torres Strait Islander
BOCSAR Bureau of Crime Statistics and Research
CEMP Construction Environmental Management Plan
CSNSW Corrective Services NSW
dBA A-weighted decibels
DEC Department of Environment and Conservation
DECC Department of Environment and Climate Change
DECCW Department of Environment, Climate Change and Water
DJ Department of Justice
DotE Department of the Environment
DPI Department of Primary Industries
EP&A Act Environmental Planning and Assessment Act 1979
EP&A Regulation Environmental Planning and Assessment Regulation 2000
EPA Environment Protection Authority
EPBC Act Environment Protection and Biodiversity Act 1999
GHD GHD Pty Ltd
Infrastructure SEPP State Environmental Planning Policy (Infrastructure) 2007
LGA Local Government Area
LEP Local Environmental Plan
m2
square metre
m metre/s
NPI National Pollutant Inventory
NSW New South Wales
NRAtlas NSW Natural Resource Atlas
OEH Office of Environment and Heritage
PBCP Prison Bed Capacity Program
PCT Plant Community Type
PCYC Police Community Youth Clubs
REF Review of Environmental Factors
RFS NSW Rural Fire Service
SEPP State Environmental Planning Policy
STCC Short-term correctional centres
TSC Act Threatened Species Conservation Act 1995
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637 | 1
1. Introduction
This section provides details on the background of the proposal, its objectives and site
location.
1.1 Background and purpose of the proposal
The Wellington Correctional Centre (the existing facility) is located on the Mudgee-Goolma
Road, Wellington NSW (the site) approximately 358 kilometres north-west of Sydney.
The existing facility is operated by Corrective Services NSW (CSNSW) and accommodates a
maximum operational capacity of 703 inmates including maximum, medium and minimum
security male inmates and minimum security female inmates. It accepts prisoners charged and
convicted under New South Wales and/or Commonwealth legislation.
The unprecedented and unanticipated rise in inmate numbers in recent years, which has
exceeded previous inmate population projections, has placed demand pressures on the
correctional system. This has resulted in a number of inefficiencies and operational challenges.
The Department of Justice (DJ) is therefore proposing to construct and operate a 400 bed
temporary correctional accommodation facility with associated infrastructure and services at the
site (referred to as ‘the proposal’). The proposal is anticipated to be operational for
approximately 5-7 years, at which time it will be demolished. The proposal is part of the Prison
Bed Capacity Program (PBCP) to be undertaken by DJ.
1.2 Proposal summary
The proposal would be undertaken within a 12 hectare area located 340 metres south-west of
the existing facility (referred to as ‘the study area’). It would include:
1 x 400 bed temporary correctional facility accommodation
Ancillary buildings
Access roads and services.
The proposal would consist of portal frame buildings to enable construction within a short
timeframe, commencing in August 2016. The proposal is intended to operate for a period of five
to seven years until such time that permanent facilities can be designed and delivered across
NSW, and then it would be demolished.
The location and footprint of the proposal is show on Figure 1-1 and the site plans provided in
Appendix B.
1.3 Proposal objectives
The objective of the proposal is to:
Provide additional prison accommodation and associated infrastructure to assist in
alleviating the current State shortage
Ensure compliance with legislation and conditions of approval, permits and licences.
1.4 Location and land use
The existing facility is located on the Mudgee-Goolma Road, approximately seven kilometres
north-east of the Wellington town centre. The site upon which the proposal is to be constructed
is referred to as lot 1, DP 1141897, and has a total area of approximately 142.4 hectares.
2 | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637
The site currently contains existing utilities including optical fibre cable, a gas pipeline, sewer
valves and a water tank. A drainage line runs on a north-south alignment through the western
portion of the study area. A dam has been constructed outside of, but within the immediate
vicinity of the study area, to capture water from the drainage line. Refer to Figure 1-2.
1.5 Land ownership
The land is owned by the Minister of Justice.
1.6 Purpose of this report
For an activity subject to Part 5 of the Environmental Planning and Assessment Act 1979 (EP&A
Act), section 111 of the Act imposes a duty on a determining authority to ‘examine and take into
account to the fullest extent possible all matters affecting or likely to affect the environment by
reason of that activity’. Determining authorities make a determination about whether a proposal
can proceed, and on what basis.
The purpose of this REF is to summarise the results of the environmental impact assessment
for the proposal and provide information about the proposal as an input to the determination
process. DJ (as the determining authority) will consider the findings of the REF as part of the
determination process.
1.7 Scope and limitations
This report has been prepared by GHD for DJ and may only be used and relied on by DJ for the
purpose agreed between GHD and the DJ as set out in section 1.6 of this report. GHD
otherwise disclaims responsibility to any person other than DJ arising in connection with this
report. GHD also excludes implied warranties and conditions, to the extent legally permissible.
The services undertaken by GHD in connection with preparing this report were limited to those
specifically detailed in the report and are subject to the scope limitations set out in the report.
The opinions, conclusions and any recommendations in this report are based on conditions
encountered and information reviewed at the date of preparation of the report. GHD has no
responsibility or obligation to update this report to account for events or changes occurring
subsequent to the date that the report was prepared. The opinions, conclusions and any
recommendations in this report are based on assumptions made by GHD as described
throughout this report. GHD disclaims liability arising from any of the assumptions being
incorrect.
GHD has prepared this report on the basis of information provided by DJ and others who
provided information to GHD (including Government authorities), which GHD has not
independently verified or checked beyond the agreed scope of work. GHD does not accept
liability in connection with such unverified information, including errors and omissions in the
report which were caused by errors or omissions in that information.
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GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637 | 5
2. Statutory considerations
This section provides an overview of the statutory framework relevant to the proposal,
including the assessment requirements, relevant environmental legislation and planning
instruments.
2.1 Environmental Planning and Assessment Act 1979
The Environmental Planning and Assessment Act 1979 (EP&A Act) and the Environmental
Planning and Assessment Regulation 2000 (EP&A Regulation) provide the statutory basis for
planning and environmental assessment in NSW. The EP&A Act provides the framework for
environmental planning and development approvals and includes provisions to ensure that the
potential environmental impacts of a development are assessed and considered in the decision
making process.
2.1.1 Application of Part 5 of the EP&A Act
As a result of the application of the Infrastructure SEPP (as described in section 2.2.1), the
proposal is subject to Part 5 of the EP&A Act. In relation to Part 5 activities, section 111 of the
EP&A Act imposes a duty on a determining authority to ‘examine and take into account to the
fullest extent possible all matters affecting or likely to affect the environment by reason of that
activity’. These matters are assessed in Section 6 of this REF. The environmental impact of the
works has been assessed against the factors listed under clause 228 of the EP&A Regulation
provided in Appendix A.
Section 110(1) defines a determining authority as ‘a Minister or public authority and, in relation
to any activity, means the Minister or public authority by or on whose behalf the activity is or is
to be carried out or any Minister or public authority whose approval is required in order to enable
the activity to be carried out’.
In accordance with clause 26 of the Infrastructure SEPP, DJ is the proponent and a determining
authority for the proposal. This REF has been prepared to satisfy DJ’s requirements under the
EP&A Act.
2.2 Environmental planning instruments
The environmental planning instruments that are relevant to the assessment of the proposal are
considered below.
2.2.1 State environmental planning policies (SEPPs)
State Environmental Planning Policy (Infrastructure) 2007
The Infrastructure SEPP clarifies the consent arrangements for infrastructure projects.
According to clause 8(1), if there is any inconsistency, the Infrastructure SEPP prevails over
other environmental planning instruments.
Clarification of consent requirements
The existing facility is a gazetted correctional centre provided by clause 24 of the Instructure
SEPP. The definition of correctional centre provided by clause 24 includes premises declared
as such under section 225 of the Crimes (Administration of Sentences) Act 1999. The site on
which the proposal is to be constructed has been gazetted as a correctional complex. DJ are
currently seeking advice on the process for gazettal for the proposal site as a correctional
centre.
6 | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637
Clause 26 of the Infrastructure SEPP outlines the consent arrangement for correctional centres
and correctional complexes. It outlines development that may be carried without consent, as
follows:
Development for any of the following purposes may be carried out by or on behalf of a public
authority without consent on land within a prescribed zone if the development is in
connection with an existing correctional centre:
(a) transitional group homes that each contain not more than 5 bedrooms and
accommodate fewer residents than the number equal to the number calculated by
multiplying the number of bedrooms in the home by 2,
(b) sporting facilities or additions to sporting facilities, if the development does not involve
clearing of more than 2 hectares of native vegetation,
(c) demolition of buildings,
(d) replacement of accommodation, administration or other facilities in a correctional
complex,
(e) alterations of, or additions to, a correctional complex,
(f) construction, maintenance or realignment of security fencing with a height of not more
than 12 metres above ground level (existing).
In accordance with clause 26(e), the proposal comprises development for the purposes of
alternations of, or additions to, a correctional complex and would be carried out by or on behalf
of a public authority (DJ).
The site is zoned SP2 Infrastructure under the Wellington Local Environmental Plan 2012 (the
LEP) (refer to section 2.2.2). As defined by clause 24 of the Infrastructure SEPP, prescribed
zones in which development may be carried by or on behalf of a public authority without consent
include SP2 Infrastructure. Accordingly, the proposal also complies with this requirement.
As demonstrated above, the proposal can therefore be carried out without development consent
in accordance with clause 26(e) of the Infrastructure SEPP.
Other requirements under the Infrastructure SEPP
Clauses 13 to 16 of the Infrastructure SEPP outline the requirements for consultation with
councils and other public authorities for any infrastructure development carried out by or on
behalf of a public authority that meets the requirements under these clauses. A summary of the
statutory consultation undertaken is provided in section 2.5.
2.2.2 Wellington Local Environmental Plan 2012
The Wellington Local Environmental Plan 2012 (the LEP) applies to the land in which the
proposal is located. The proposal site is located within land zoned as SP2 Infrastructure:
Correctional Centre. Refer to Figure 2-1. The zone provisions provide that the proposal can be
carried out in this zone with consent. However, clause 5.12 of the LEP states that ‘…this Plan
does not restrict or prohibit, or enable the restriction or prohibition of, the carrying out of any
development, by or on behalf of a public authority, that is permitted to be carried out with or
without development consent, or that is exempt development, under State Environmental
Planning Policy (Infrastructure) 2007’. As the proposal is permitted without consent under the
Infrastructure SEPP, the consent requirements of the Wellington LEP do not apply to the
proposal.
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637 | 7
2.3 Other legislative considerations
2.3.1 NSW legislation
Other environmental legislation that is directly relevant to the approval and/or assessment of the
proposal is considered in Table 2-1.
Table 2-1 Consideration of relevant legislation
Act Potential approval requirement
for correctional centres /
complexes
Relevance to the proposal
Roads Act 1993 Approval under section 138 for works to a public road
Section 138 of the NSW Roads Act 1993 (the Roads Act) requires applicants to obtain approval from the relevant roads authority for the erection of a structure, or the carrying out of work in, on or over a public road, or the digging up or disturbance of the surface of a road.
The proposal would include provision of a new road access to the site from Mudgee-Goolma Road (an arterial road).
These works require approval under section 138 of the Roads Act. The approval authority would be Roads and Maritime Services (RMS).
National Parks
and Wildlife Act
1974
A heritage impact permit under section 87 of the Act to harm or desecrate an Aboriginal heritage object.
There are no listed Aboriginal heritage items or places located on or in the vicinity of the site. As a result of the existing levels of site disturbance, there is minimal likelihood that unknown items of Aboriginal heritage significance would be present.
Further information is provided in section 6.7.
Heritage Act 1977 Approval under section 57(1) for works to a place, building, work, relic, moveable object, precinct, or land listed on the State Heritage Register.
An excavation permit under section 139 to disturb or excavate any land containing or likely to contain a relic.
There are no listed heritage items located within or in the vicinity of the site. The nearest listed heritage item is located approximately 5.8 kilometres south of the study area.
As a result of the existing levels of site disturbance, there is minimal likelihood that unknown items of historic significance or relics would be present.
Further information is provided in section 6.7.
Threatened
Species
Conservation Act
1995 (TSC Act)
The TSC Act lists threatened species, populations or ecological communities to be considered in deciding whether there is likely to be a significant impact on threatened biota, or their habitats. If any of these could be impacted by the project, an assessment of significance that addresses the requirements of section 5A of the EP&A Act must be completed to determine the significance of the impact.
The proposal site has been cleared in the past and subject to previous disturbance. The proposal would not result in any impacts to listed flora, fauna or communities, and a species impact statement is not required.
Further information is provided in section 6.6.
Noxious Weeds
Act 1993
Under Part 3 Division 1 of the Act, all private landowners, occupiers, public authorities and Councils are required to control noxious weeds on their land.
Three noxious weed species were identified during the surveys. The proposal has the potential to cause the further spread of noxious weeds such as African Boxthorn and Tree of Heaven in the proposal site and study area.
Further information is provided in section 6.6.
8 | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
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2.3.1 Commonwealth legislation
Commonwealth Environment Protection and Biodiversity Conservation Act 1999
An Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) protected
matters search was undertaken on 5 July 2016 for an area within a 500 metre radius of the
proposal site. The results of the search are summarised in Table 2-2. As no impacts are
predicted, an approval under the EPBC Act would not be required.
Table 2-2 EPBC Act protected matters search results
EPBC Act protected matter
Matter located within search radius
Comments Potential impact
World Heritage Properties
None The proposal would not impact on any World Heritage properties.
None
National Heritage Places
None The proposal would not impact on any National Heritage properties.
None
Wetlands of international importance(Ramsar sites)
None The proposal would not impact on any wetlands.
None
Threatened ecological communities
Two The literature review, database search and field surveys identified a number of species and one ecological community (Box-Gum Woodland) listed under the EPBC Act and/or TSC Act with the potential to occur in the study area. It is unlikely that the proposal would affect any of these biota primarily due to the degraded nature of the habitat proposed to be removed.
None
Threatened species 19 species including seven birds, two fish, five mammals, four plant species and one reptile
Refer to comments above. None
Listed migratory species
Five species including one migratory marine bird, three terrestrial species, one wetlands species
None
Nuclear actions None The proposal does not involve a nuclear action.
None
Commonwealth Marine Areas
None No Commonwealth marine areas are located within the search radius.
None
Great Barrier Reef Marine Park
None The Great Barrier Reef Marine Park is outside the search radius.
None
Commonwealth land
None The proposal would not directly or indirectly impact on any Commonwealth land.
None
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
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EPBC Act protected matter
Matter located within search radius
Comments Potential impact
A water resource, in relation to coal seam gas development and large coal mining development
Not relevant Not relevant. None
2.4 Summary of approvals and consents
A summary of approvals and consents required for the proposal is summarised in Table 2-3
below.
Table 2-3 Summary of approvals and consents for the proposal
Agency Activity Relevant legislation
DJ Determining authority for the
proposal
Clause 26 of the Infrastructure SEPP
RMS Approval authority for construction
of new access
Roads Act 1993
As a result of the application of the Infrastructure SEPP the proposal does not require
development consent and it is subject to assessment and determination under Part 5 of the
EP&A Act. DJ and RMS would be determining authorities for the proposal.
The new road access also requires approval from RMS under section 138 of the Roads Act.
No other approvals or consents are required.
2.5 Consultation
A summary of the consultation requirements undertaken for the proposal in accordance with
clauses 13, 14, 15 and 16 of the Infrastructure SEPP is provided in Table 2-4 below.
Table 2-4 Consultation requirements under clauses 13-16 of the
Infrastructure SEPP
Clause under Infrastructure SEPP Comments
13(1)(a) the development will have a substantial
impact on stormwater management services provided
by a council
Not applicable. The site is not
serviced by Council stormwater
infrastructure.
13(1)(b) the development is likely to generate traffic to
an extent that will strain the capacity of the road
system in a local government area
Applies. The proposal is likely to
generate traffic to an extent that will
strain the capacity of the existing road
system. A letter providing written
notice of the intention to carry out the
development was sent to Roads and
Maritime Services (RMS) on 7 July
2016 in accordance with clauses 13
(2) of the Infrastructure SEPP. A copy
of this letter is provided in Appendix C.
13(1)(c) the development involves connection to, and Applies. The proposal will involve
10 | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
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Clause under Infrastructure SEPP Comments
a substantial impact on the capacity of, any part of a
sewerage system owned by a council
connection to Council’s sewerage
system. A letter providing written
notice of the intention to carry out the
development was sent to Western
Plains Regional Council (Council) on 7
July 2016 in accordance with clauses
13 (2) of the Infrastructure SEPP. A
copy of this letter is provided in
Appendix C.
13(1)(d) development involves connection to, and use
of a substantial volume of water from, any part of a
water supply system owned by a council
Applies. The proposal will involve
connection to and use of water from
Council’s water supply system. A letter
providing written notice of the intention
to carry out the development was sent
to Council on 7 July 2016 in
accordance with clauses 13 (2) of the
Infrastructure SEPP. A copy of this
letter is provided in Appendix C.
13(1)(e) development involves the installation of a
temporary structure on, or the enclosing of, a public
place that is under a council’s management or control
that is likely to cause a disruption to pedestrian or
vehicular traffic that is not minor or inconsequential
Not applicable. The proposal does
not involve the installation of a
temporary structure on, or the
enclosing of, a public place.
13(1)(f) development involves excavation that is not
minor or inconsequential of the surface of, or a
footpath adjacent to, a road for which a council is the
roads authority under the Roads Act 1993 (if the public
authority that is carrying out the development, or on
whose behalf it is being carried out, is not responsible
for the maintenance of the road or footpath)
Not applicable. The proposal does
not involve excavation of the surface
of a footpath adjacent to a road.
14(1)(a) development is likely to have an impact that is
not minor or inconsequential on a local heritage item
(other than a local heritage item that is also a State
heritage item) or a heritage conservation area
Not applicable. Construction,
operation and demolition of the
proposal would not result in any
impacts to listed/known Aboriginal or
non-Aboriginal heritage items.
15(1)(2) A public authority, or a person acting on
behalf of a public authority, must not carry out, on
flood liable land, development that this Policy provides
may be carried out without consent and that will
change flood patterns other than to a minor extent….
Not applicable. The proposal is not
located on flood liable land.
16(2)(a) development adjacent to land reserved under
the National Parks and Wildlife Act 1974—the
Department of Environment and Climate Change
Not applicable. The proposal is not
located adjacent to land reserved
under the National Parks and Wildlife
Act 1974.
16(2)(b) development adjacent to a marine park Not applicable. The proposal is not
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
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Clause under Infrastructure SEPP Comments
declared under the Marine Parks Act 1997—the
Marine Parks Authority
located adjacent to a marine park.
16(2)(c) development adjacent to an aquatic reserve
declared under the Fisheries Management Act 1994—
the Department of Environment and Climate Change
Not applicable. The proposal is not
located adjacent to an aquatic
reserve.
16(2)(d) development in the foreshore area within the
meaning of the Sydney Harbour Foreshore Authority
Act 1998—the Sydney Harbour Foreshore Authority
Not applicable. The proposal is not
located within the Sydney harbour
foreshore area.
16(2)(e) development comprising a fixed or floating
structure in or over navigable waters—the Maritime
Authority of NSW
Not applicable. The proposal does
not comprise a fixed or floating
structure in over navigable waters.
16(2)(f) development for the purposes of an
educational establishment, health services facility,
correctional centre or group home, or for residential
purposes, in an area that is bush fire prone land (as
defined by the Act)—the NSW Rural Fire Service
Applies. The location of the proposal
is more than 140m from the nearest
mapped bushfire prone land.
However, as the proposal is located
within the same lot identified as being
bushfire prone, a letter providing
written notice of the intention to carry
out the proposal was sent to the NSW
Rural Fire Service (RFS) on 7 July
2016. A copy of this letter is provided
in Appendix C.
At the time of writing this report, no response from Council, RMS or RFS has been received.
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GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
Accommodation, 21/25637 | 13
3. Need for the project
This section discusses the existing facility and provides the context for the proposal.
3.1 Existing facility
The existing facility was opened in September 2007. It accommodates a maximum operational
capacity of 703 inmates including maximum, medium and minimum security male inmates and
minimum security female inmates.
The existing facility is currently running at or above capacity and is inadequate to meet the
current inmate population.
3.2 Project justification
The proposal would comprise a standalone, self-operating facility. There is an abundance of
available land on the site and the proposal can be adequately accommodated within the existing
site. Site investigations have confirmed that the proposal would not result in any impacts to
ecological or cultural heritage values at the property. Further information is provided in section
6.
The existing facility is unable to meet the increasing and changing demands of the growing
prison population. The proposal would respond to long term growth forecasts through the
provision of additional prison beds and associated infrastructure in the area.
It is considered that a temporary facility is the best way to meet the immediate needs of DJ
whilst longer term solutions are resolved and implemented. The longer term solutions will likely
involve the construction of larger permanent correctional facilities in defined locations.
14 | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
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4. Site selection
This section briefly describes the site selection methodology and the options considered
for the proposal.
4.1 Introduction
As discussed in section 3, an urgent need for additional prison accommodation in the area has
been identified. The following options were considered in relation to the proposal.
4.2 Site selection development
Based on preliminary layouts developed by DJ, the overall land footprint required for the
proposal is approximately 12 hectares.
DJ have determined that there is a significant benefit to co-locating the proposal with an existing
facility as there would be no need to acquire additional land to construct the proposal. It would
utilise existing land available at existing correctional facilities throughout NSW.
Therefore DJ require that the temporary accommodation facilities are constructed within the
lands already owned or directly accessible by The Minister for Justice and adjacent to existing
facilities.
Since mid-May 2016, DJ has been reviewing a list of sites provided by CSNSW as possible
locations for the facilities. These are as follows:
Emu Plains
St Heliers
Wellington
Kirkconnell
Lithgow
Bathurst
Goulburn
Kariong
Junee
Cessnock
Cobham Juvenile Justice Centre.
4.3 Site selection criteria
In order to assess each of these sites and their capacity to accommodate one of the new
facilities, a series of selection criteria was set up in order to rank the suitability of the possible
sites and their opportunities. These criteria were:
Owned by Minister of Justice or access available from other departments
Size of available land is in the vicinity of 10-16 hectares
Planning constraints or site conditions were not an impediment to proposal (either by REF
process or development application)
Timeframe to obtain development consent
GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
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Proximity to the greater Sydney region.
Further, a high level consideration of services availability and other site specific impediments
was undertaken.
Based upon the assessment, the following sites were considered unsuitable due to the reasons
identified in Table 4-1 below:
Table 4-1 Sites considered unsuitable to construct proposal
Limited land availability Planning issues
Lithgow Kariong (heritage / land ownership)
Bathurst Kirkconnell (land ownership / utilities
constraints) Goulburn
Cobham
The following sites in Table 4-2 were considered suitable for further review and investigation:
Table 4-2 Sites considered suitable to construct proposal
REF process Development application process
Emu Plains St Heliers
Wellington
Junee
Cessnock
In order to further investigate the suitability of these sites, further investigations were carried out,
including:
Site detail surveys to determine best location and siting suitability
Detailed investigation of existing services, and determination of required services to
service facilities
Completion of geotechnical studies
Development of a site specific masterplan.
4.4 Option evaluation
4.4.1 Evaluation of suitable sites
An evaluation of the sites considered suitable to construct the proposal is provided in Table 4-3
below.
Table 4-3 Site evaluation
Site Comments Ranking
Emu Plains Most desirable site to CSNSW due to its
proximity to the Sydney region, however the
site is impacted by flooding due to its
proximity to the Nepean River.
Most desirable
site, however
need to finalise
flood modelling
16 | GHD | Report for NSW Department of Justice - Wellington Correctional Centre - 400 Bed Temporary Correctional
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Site Comments Ranking
There are a number of available positions on
the Emu Plains landholding suitable to house
the temporary facilities.
DJ are currently undertaking flood modelling,
and earthworks calculations in order to
understand the extent of site preparation
works required in order to commence.
Current estimates are that the costs may be
in the order of $16-20 million and six months
to prepare the site ready for construction
activities.
The impacts upon the Women’s Dairy
Industries should be considered when
considering this site.
and earthworks
prior to
commencing
Wellington
and Junee
These sites are able to be considered for
approval through the REF process due to
their existing zoning, use and gazettal.
There is sufficient landholdings on each of
the sites to house one or two centres.
There are no areas of significant concern
from an approvals perspective that have
been identified at this time.
The significant issue with these sites are their
distance from Sydney and the impacts from a
cost and time perspective on the construction
and ultimate operation in these locations.
Desirable, able to
commence
approval process
Cessnock There are a number of available site
positions at this location.
DJ are currently resolving the best location
for a temporary facility whilst being mindful of
medium term proposals for 320, 280 and
2000 bed facilities.
The construction of one or more temporary
facilities in this location will likely mean that
the size of the 2000 bed facility will be
significantly reduced.
Desirable,
however need to
resolve location
for temporary
facility on site
4.4.2 Do nothing option
The do nothing option would not address the identified deficiencies associated with the
inadequate prison accommodation which is unable to meet the current and projected inmate
population. The do nothing option is not considered to be acceptable in terms of meeting the
objectives of the proposal.
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4.4.3 Preferred option
Wellington was selected as a suitable candidate for the construction of the proposal for the
reasons outlined in Table 4-3.
There is an issue with the site’s distance from Sydney and the potential impacts from a cost and
time perspective on the construction and ultimate operation of the proposal. This issue has been
considered throughout this REF.
It is noted that DJ is considering the progression of the other sites and may progress these
concurrently or subsequently.
In order for DJ to continue to deliver on the NSW Government’s policy objectives and to address
current demand and network issues, it was recommended that the proposal proceed.
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5. Description of the proposal
This section provides a description of the infrastructure to be provided for the proposal
including relevant details relating to its construction and demolition.
5.1 The proposal
Due to the urgent need for additional custodial accommodation in NSW, DJ and CSNSW have
worked to develop the concept for a correctional centre model that can be promptly erected and
house up to 400 prisoners in dormitory style accommodation.
The proposal would be designed to operate with a maximum security classification and would
be constructed from a secured panelised construction system utilising standardised modular
materials.
The proposal is intended to commence operations from February/March 2017 and operate for a
period of five to seven years, until such time that permanent facilities can be designed and
delivered across NSW, and then it would be demolished.
The proposal would be known as a short-term correctional centre (STCC) and would include the
following:
Four accommodation buildings, each housing 100 prisoners
Visits centre
Officer programs building
Clinic
Industries
Segregation unit
Open space/exercise area
Staff and visitor car park
Surrounding 3.6 metre high chainwire security fence.
Refer to preliminary design plans provided in Appendix B. A more detail description of the
proposal is provided below.
Accommodation
The accommodation is proposed to be housed in four single storey buildings. Each building
would accommodate 100 inmates and include kitchens and living/dining areas.
Visits centre
The visits centre would comprise a single storey building containing indoor and outdoor visit
areas and officer post.
Reception area and clinic
The reception area and clinic would be located within one single storey building, adjacent to the
visits centre.
Industries/workshops
Two workshop areas are located within separate single storey buildings. Workshop 1 is located
adjoining the reception area, whilst Workshop 2 is located adjoining the segregation unit.
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Segregation unit
A segregation unit for solitary confinement is provided adjoining workshop 1.
Open space/exercise area
The proposal would include an exercise area which would comprise a new playing and open
space area.
Visitor and staff car parks
Two new car parks are proposed for visitor and staff car parking. visitor car park. A new access
to the car park would be provided from Mudgee-Goolma Road. The car park would provide
parking for approximately 160 cars (80 staff and 80 visitor).
5.1.1 Hours of operation and staff/visitor numbers
The facility would operate 24 hours a day, seven days a week.
The number of staff would be approximately 220, consisting of administration, education,
industries management and custodial staff.
The number of visitors to the facility would be limited to two sessions on weekends and public
holidays only. This is expected to be 90 visitors per session.
5.1.2 Traffic, access and servicing
Access to the facility will be from Mudgee-Goolma Road. A new intersection and access road
would be required, which would be located around 550 metres to the south of the existing
correctional facility access road.
The proposal is expected to generate 317 inbound and 317 outbound vehicle trips per day.
It is estimated that during the construction and demolition periods, up to 300 light vehicles and
50 heavy vehicles per day will be required for construction, seven days a week. This equates to
600 light vehicle movements and 100 heavy vehicle movements per day.
For further information on the proposed impacts due to increased traffic entering the site, refer
to sections 6.3.2 and 6.3.3.
5.1.3 Drainage and utilities
The proposal will require connection to Council’s water supply and sewerage infrastructure.
The proposal will require some minor earthworks in order to improve the existing cleared area
for the construction of the building pad. The proposal is not anticipated to alter the current
drainage arrangements onsite.
5.2 Construction and demolition works
5.2.1 Indicative construction and demolition methodology
Construction methodology
Construction of the proposal is likely to include the following general activities by the
contractor(s):
Site establishment, construction compounds, fencing etc.
Establishment of construction access points/road
Installation of erosion and sediment controls
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Clearing and removal of topsoil
Excavation works, grading and levelling the construction site for structures
Building works including brickwork, pre-cast and concrete foundation placement
Road, car park and associated civil works
Building services installation and fit out
Site stabilisation and landscaping with native vegetation.
Demolition methodology
The demolition would be undertaken in accordance with a demolition environmental
management plan prepared by the contractor and approved by DJ prior to commencement of
works. The environmental management plan would document the mechanisms for achieving
compliance with the commitments made in this REF.
The environmental management plan would also outline, but not be limited to, appropriate
measures for the re-use of existing structures and general site rehabilitation. It would also
consider matters including traffic management and erosion and sediment control measures
during demolition of the proposal.
During preparation of the environmental management plan, the requirements of the relevant
guidelines and legislation would be considered and all mitigation measures associated with the
demolition of the proposal outlined as discussed in sections 6 and 7.2.
Additional management plans would also be developed to address the removal of inmates from
the facility prior to demolition and the redeployment of existing staff to other facilities, as
required.
Demolition of the proposal is likely to include the following general activities by the contractor(s):
Site establishment
Removal of any hazardous materials
Removal of relocatable structures
Removal of concrete hardstand
Site clearance and testing (if required)
Site demobilisation and rehabilitation.
5.2.2 Construction and demolition equipment
The type of equipment likely to be required for the construction work would include:
Excavators or similar earthmoving equipment
Concrete agitators and pumps
Low loader transporters and delivery/material transport vehicles (construction spoil and
waste materials)
Light commercial and passenger vehicles
Small lifting machinery
Rollers
Pneumatic and general hand tools.
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5.2.3 Construction and demolition site layout
The contractor would establish a compound area to accommodate construction activities for the
duration of the construction period. The compound area would accommodate the following
facilities:
Vehicle parking
Site office
Amenities
Stockpiles
Fuel storage.
5.2.4 Construction value
Construction of the proposal is anticipated to cost between $80-100 million.
5.2.5 Construction timeframe
Construction of the proposal is anticipated to take approximately seven months to complete.
Construction is currently programmed to commence in August 2016.
Construction of the proposal would be undertaken seven days a week, comprising two, eight
hour shifts starting at 6am.
5.2.6 Construction environmental management plan
The proposal would be undertaken in accordance with a construction environmental
management plan (CEMP) prepared by the construction contractor and approved by DJ prior to
the commencement of works. The CEMP would document the mechanisms for achieving
compliance with the commitments made in this REF and the conditions of approval that relate to
construction.
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6. Environmental assessment
This section identifies and characterises the likely potential impacts associated with the
construction, operational and demolition phases of the proposal.
6.1 Location and land use
6.1.1 Existing environment
The site upon which the proposal is to be constructed is currently vacant land used for grazing.
The site is directly adjoined by:
Mudgee-Goolma Road to the west
Rural residential housing to the south
Land used for grazing and other agricultural facilities to the north and east.
Land uses in the surrounding area include:
Goolma Road to the west
The State Government Soil Conservation Service located at 6582 Goolma Road,
approximately 340 metres from the western boundary of the site (and approximately 470
metres from the area that would be subject to the proposal)
Residential housing located within Cadonia Estate, located at 6-28 Cadia Place,
Wuuluman, approximately 125 metres from the south-eastern boundary of the site (and
approximately 340 metres from the area that would be subject to the proposal).
6.1.2 Construction and demolition impacts
Other than the temporary occupancy of vacant areas within the site by construction plant and
equipment, the proposal would not result in any impacts to land use during construction. Given
the location of residential properties in close proximity to the construction site, some impacts
associated with noise and vibration, traffic and air quality impacts are likely to result. These
impacts are discussed in more detail in sections 6.2.2, 6.3.2 and 6.4.2 below.
Construction and demolition works would be short term in nature and would be carried out with
due diligence, duty of care and best management practices. This would be documented in the
project specific Construction Environmental Management Plan (CEMP).
6.1.3 Operational impacts
As noted in section 2.2.2, the proposal is consistent with the land use zoning of the site. The
proposal would expand the areas of operations on site, but would not result in changes to the
overall land use of the site.
6.1.4 Mitigation
Construction and demolition
The following mitigation measures would be included in the CEMP and implemented during
construction to minimise potential impacts on land use:
The neighbouring landowners are to be consulted with regard to the construction works,
predicted program and any access requirements as required.
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Best management construction and demolition impacts are to be documented in a project
specific CEMP.
Land disturbance during construction is to be strictly limited to that required to undertake
the construction and demolition works.
Construction and demolition works would be undertaken in consideration of adjacent
vegetation.
Areas disturbed during construction would be returned to the pre-construction condition.
Operational
No additional mitigation measures would be required.
6.2 Noise and vibration
6.2.1 Existing environment
The existing facility is located in a rural area with low background noise levels. As such,
background noise measurements have not been conducted for the assessment of construction
and operational noise emissions from the site. The background noise level is assumed to be 30
dBA, which is the minimum noise level prescribed in the Environment Protection Authority’s
Industrial Noise Policy (EPA, 2000).
The nearest sensitive receivers are located to the north-west and south-east of the site and are
shown below in Figure 6-1. Receiver IDs and locations are presented in Table 6-1 below. It is
noted that all sensitive receivers are residential.
Table 6-1 Receiver IDs and locations
Receiver ID Receiver location
R01 Gooma Road
R02 28 Cadia Place
R03 27 Cadia Place
R04 22 Cadia Place
R05 21 Cadia Place
R06 14 Cadia Place
R07 6 Cadia Place
R08 7 Cadia Place
R09 9 Cadonia Drive
R10 7 Cadonia Drive
R11 79 Twelve Mile Road
R12 59 Twelve Mile Road
R13 32 Cadonia Place
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6.2.2 Construction and demolition impacts
Construction noise criteria
The Interim Construction Noise Guideline (ICNG) (Department of the Environment and Climate
Change (DECC) (now Department of Environment, Climate Change and Water (DECCW),
2009)) is specifically aimed at managing noise from construction.
The ICNG outlines standard hours for construction activities as 7 am to 6 pm Monday to Friday,
8 am to 1 pm on Saturdays and no work on Sundays or public holidays. The ICNG
acknowledges that the following activities have justification to be undertaken outside the
recommended standard construction hours assuming that all reasonable and feasible mitigation
measures are implemented to minimise the impacts to the surrounding sensitive land uses:
The delivery of oversized plant or structures that police or other authorities determine to
require special arrangements to transport along public roads
Emergency work to avoid the loss of life or damage to property, or to prevent
environmental harm
Works where a proponent demonstrates and justifies a need to operate outside the
recommended standard construction hours
Works which maintain noise levels at receivers to below the noise management levels
outside of the recommended standard construction hours.
Table 6-2 details the ICNG construction noise management levels at sensitive land uses and
residences near the proposal, respectively, where:
The noise affected noise management level represents the point above which there may
be some community reaction to noise. Where the predicted or measured LAeq(15min) is
greater than the noise affected level, the proponent should apply all feasible and
reasonable work practices to meet the noise affected level. The proponent should also
inform all potentially impacted residents of the nature of works to be carried out, the
expected noise levels and duration, as well as contact details.
The highly noise affected level represents the point above which there may be strong
community reaction to noise. Where noise is above this level, the relevant authority
(consent, determining or regulatory) may require respite periods by restricting the hours
that the very noisy activities can occur, taking into account:
– times identified by the community when they are less sensitive to noise (such as
before and after school for works near schools, or mid-morning or mid-afternoon for
works near residences
– if the community is prepared to accept a longer period of construction in exchange for
restrictions on construction times.
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ngto
n C
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al C
entr
e -
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63
7
Ta
ble
6-2
C
onstr
ucti
on
no
ise
ma
na
ge
me
nt
leve
ls a
t re
sid
enc
es
Tim
e o
f d
ay
Managem
ent le
vel
LA
eq(1
5m
in)
How
to a
pply
Reco
mm
ended s
tandard
hours
:
Monday
to F
riday
7 a
m t
o 6
pm
Satu
rday
8 a
m t
o 1
pm
No w
ork
on S
undays
or
public
holid
ays
Nois
e a
ffect
ed
Rating b
ack
gro
und
level plu
s 10 d
B(A
)
– Pro
ject
specific
m
anagem
ent le
vel
– L
Ae
q(1
5 m
in) 40 d
B
The n
ois
e a
ffect
ed level r
epre
sents
the p
oin
t above w
hic
h t
here
may
be s
om
e c
om
munity
reaction to n
ois
e.
Where
the p
redic
ted o
r m
easu
red L
Aeq(1
5m
in)
is g
reate
r th
an t
he n
ois
e a
ffect
ed level, the
pro
ponent
sho
uld
apply
all
feasi
ble
and r
easo
nable
work
pra
ctic
es
to m
eet th
e n
ois
e
aff
ect
ed level.
The p
roponent
should
als
o info
rm a
ll pote
ntially
impact
ed r
esi
dents
of th
e n
atu
re o
f w
ork
s to
be c
arr
ied o
ut, the e
xpect
ed n
ois
e levels
and d
ura
tion,
as
well
as
conta
ct d
eta
ils.
Hig
hly
nois
e
Aff
ect
ed
75
dB
(A)
The h
ighly
nois
e a
ffect
ed level re
pre
sents
the p
oin
t above w
hic
h there
may
be s
trong
com
munity
react
ion to n
ois
e. W
here
nois
e is
above t
his
level, the r
ele
vant
auth
ority
(c
onse
nt, d
ete
rmin
ing o
r re
gula
tory
) m
ay
requir
e r
esp
ite p
eri
ods
by
rest
rict
ing the h
ours
th
at
the v
ery
nois
y act
iviti
es
can o
ccu
r, t
aki
ng into
acco
unt:
tim
es
identified b
y th
e c
om
munity
when t
hey
are
less
sensi
tive to n
ois
e (
such
as
befo
re
and a
fter
school fo
r w
ork
s near
sch
ools
, or
mid
-morn
ing o
r m
id-a
ftern
oon f
or
work
s near
resi
dence
s
if th
e c
om
munity
is p
repare
d t
o a
cce
pt
a longer
period o
f co
nst
ruct
ion in e
xchange f
or
rest
rict
ions
on c
onst
ruction tim
es.
Outs
ide r
ecom
mended s
tandard
hours
Nois
e a
ffect
ed
Rating b
ack
gro
und
level p
lus
five d
B(A
)
– Pro
ject
specific
m
anagem
ent le
vel
– L
Ae
q(1
5 m
in) 35 d
B
A s
trong just
ific
ation w
ould
typ
ically
be r
equir
ed f
or
work
s outs
ide t
he r
ecom
mended
standard
hours
.
The p
roponent
should
apply
all
feasi
ble
and r
easo
nable
work
pra
ctice
s to
meet
the n
ois
e
aff
ect
ed level.
Where
all
feasi
ble
and r
easo
nable
pra
ctice
s have b
een a
pplie
d a
nd n
ois
e is
more
than
five d
B(A
) above the n
ois
e a
ffect
ed level,
the p
roponent
should
negotiate
with t
he
co
mm
unity.
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Sleep disturbance criteria during construction
The ICNG states that where construction works are planned to extend over more than two
consecutive nights, the noise impact assessment should include maximum noise levels and the
extent and number of times the maximum exceeds the rating background levels.
The INP application notes regarding sleep disturbance recommend that where the LA1(1min) or
LAmax exceeds the LA90(15min) by more than 15 dB(A) outside the bedroom window, a more
detailed analysis is required.
The ICNG also refers to the Environmental Criteria for Road Traffic Noise (EPA, 1999) for more
guidance on sleep disturbance from maximum noise level events. This guideline has since been
superseded by the Road Noise Policy. Both guidelines provide a discussion on research into
the effects of maximum noise events on sleep disturbance. The results of this research is aimed
at limiting the level of sleep disturbance due to environmental noise and concludes that the
LAmax or LA1(1min) level of any noise should not exceed the ambient LA90(15min) noise level by more
than 15 dB(A). This guideline takes into account the emergence of noise events, but does not
directly limit the number of such events or their highest level, which are also found to affect
sleep disturbance.
The Road Noise Policy provides further guidance, which indicates that:
Maximum internal noise levels below 50–55 dB(A) are unlikely to cause awakening
reactions
One or two noise events per night with maximum internal noise levels of 65–70 dB(A) are
not likely to significantly affect health and wellbeing.
For this assessment the background level plus 15 dB(A) has been used as a screening level
assessment of sleep disturbance which is consistent with the Industrial Noise Policy (application
notes.
Construction traffic noise criteria
The Road Noise Policy (DECCW, 2011) provides traffic noise target levels for residential
receivers in the vicinity of existing roads (Table 6-3). These levels are applied to construction
works to identify potential construction traffic impacts and the potential for reasonable and
feasible mitigation measures.
Table 6-3 Construction traffic noise criteria, LAeq(period, dB(A)
Type of development Day 7 am to 10 pm
Night 10 pm to 7 am
Existing residence affected by additional traffic on arterial roads generated by land use developments
60 Leq(15hr) 55 Leq(9hr)
Existing residence affected by additional traffic on local roads generated by land use developments
55 Leq(1hr) 50 Leq(1hr)
The application notes for the Road Noise Policy (DECCW, 2011) state that ‘for existing
residences and other sensitive land uses affected by additional traffic on existing roads
generated by land use developments, any increase in the total traffic noise level as a result of
the development should be limited to two dB above that of the noise level without the
development. This limit applies wherever the noise level without the development is within two
dB of, or exceeds, the relevant day or night noise assessment criterion.’
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If road traffic noise increases from construction work are within two dB(A) of current levels the
objectives of the Road Noise Policy (DECCW, 2011) are met and no specific mitigation
measures are required.
Methodology
Noise modelling was undertaken using SoundPlan (v7.4). SoundPlan is a computer program for
the calculation, assessment and prognosis of noise exposure. SoundPlan calculates
environmental noise propagation according to ISO 9613-2 ‘Acoustics – Attenuation of sound
during propagation outdoors’.
The following noise modelling assumptions were made:
Surrounding land was modelled assuming soft ground with a ground absorption
coefficient of 0.75
Atmospheric absorption was based on an average temperature of 10 °C and an average
humidity of 70%
Atmospheric propagation conditions were modelled with noise enhancing wind conditions
for noise propagation (downwind conditions) or equivalently a well-developed moderate
ground based temperature inversions
Modelled scenarios take into account the shielding effect from surrounding buildings and
structures on and adjacent to the site.
Noise sources were modelled assuming noise propagation in the 500 Hz octave band
frequency as per ISO 9613-2
Noise sources for each scenario are in some cases modelled at different locations. As
such the noise modelling assesses the noise source at multiple locations and takes the
maximum LAeq received noise level
The construction noise modelling takes into account the likely construction staging of
construction plant to predict the noise level at each receiver location. The predicted noise levels
are compared with the noise management levels for that receiver to determine whether there
might be noise impacts during construction.
During construction, it is unlikely that all machinery would be operational at the same time
during a particular stage or activity (like the modelling assumes), but taking a ‘worst case’
scenario approach helps to identify where noise impacts are likely to be a concern and assists
in the formulation of mitigation measures.
Based on our understanding of the project, the following stages of construction are expected
and provided in Table 6-4 below.
Table 6-4 Construction scenarios and equipment
Scenario Description Equipment
1 Site establishment
Trucks
Hand tools (electric)
Generator with acoustic enclosure
Excavator (small)
2 Bulk earthworks Bulldozer
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Scenario Description Equipment
Excavator
Trucks
Compactor
Trucks (water cart)
Grader
3 Construction of perimeter fence
Bulldozer
Excavator
Crane (mobile)
4 Construction of perimeter road
Roller (vibratory)
Asphalt paver
Concrete pump and truck
Trucks
5 Construction of buildings
Trucks
Concrete pump and truck
Hand tools (electric)
Excavator (small)
6 Site compound area
Trucks
Generator with acoustic enclosure
Compressor (silenced)
Hand tools (electric)
7 Demolition
Bulldozer
Excavator
Trucks
Compactor
Trucks (water cart)
Grader
Indicative equipment noise levels are summarised in Table 6-5 for construction activities. Other
equipment than that modelled may be used, however it is anticipated that they would produce
similar noise emissions.
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Table 6-5 Construction equipment noise levels
Equipment Adopted sound
power level, dBA
Data source
Concrete pump and truck 108 AS2436 – 2010
Excavator 107 AS2436 – 2010
Bulldozer 108 AS2436 – 2010
Excavator (small) 100 AS2436 – 2010
Generator with acoustic enclosure
89 AS2436 – 2010 with acoustic enclosure
Hand tools (electric) 102 AS2436 – 2010
Asphalt paver 108 AS2436 – 2010
Roller (vibratory) 108 AS2436 – 2010
Construction noise predictions
Table 6-6 and Table 6-7 outline construction noise levels during standard construction hours
and outside of standard construction hours at modelled sensitive receivers for each construction
scenario. The cells have been shaded (as per the key) where the noise management levels for
each time period are exceeded. Impacts to sensitive receivers have the potential to occur where
sensitive receivers experience noise higher than the relevant construction noise management
level.
Table 6-6 Predicted construction noise levels at representative sensitive
receivers during standard construction hours, dBA
Exceedance of noise management level cell shading key
Exceeds 75 dBA highly noise affected level
Exceeds 40 dBA noise management level during standard construction hours
Complies with standard hours noise management level
Receiver ID Receiver location
Construction activity scenario (refer to Table 6-4)
1 2 3 4 5 6 7
R01 Goolma Road 32 45 38 42 42 35 45
R02 28 Cadia Place 38 50 43 47 44 37 50
R03 27 Cadia Place 36 48 42 45 43 37 48
R04 22 Cadia Place 36 48 42 45 43 37 48
R05 21 Cadia Place 34 47 41 44 42 36 47
R06 14 Cadia Place 33 46 39 43 42 35 46
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Exceedance of noise management level cell shading key
Exceeds 75 dBA highly noise affected level
Exceeds 40 dBA noise management level during standard construction hours
Complies with standard hours noise management level
Receiver ID Receiver location
Construction activity scenario (refer to Table 6-4)
1 2 3 4 5 6 7
R07 6 Cadia Place 32 44 38 41 41 34 44
R08 7 Cadia Place 32 44 38 41 41 34 44
R09 9 Cadonia Drive 30 42 36 39 39 32 42
R10 7 Cadonia Drive 29 41 35 38 39 31 41
R1179 Twelve Mile Road
29 42 35 39 39 31 42
R1259 Twelve Mile Road
28 41 34 38 38 30 41
R13 32 Cadonia Place 27 39 33 36 38 31 39
Table 6-7 Predicted construction noise levels at representative sensitive
receivers outside of standard construction hours, dBA
Exceedance to noise management level cell shading key
35 dBA during standard construction hours
Complies with standard hours noise management levels
Receiver ID Receiver location
Construction activity scenario (refer to Table 6-4)
1 2 3 4 5 6 7
R01 Goolma Road 32 45 38 42 42 35 35
R02 28 Cadia Place 38 50 43 47 44 37 37
R03 27 Cadia Place 36 48 42 45 43 37 37
R04 22 Cadia Place 36 48 42 45 43 37 37
R05 21 Cadia Place 34 47 41 44 42 36 36
R06 14 Cadia Place 33 46 39 43 42 35 35
R07 6 Cadia Place 32 44 38 41 41 34 34
R08 7 Cadia Place 32 44 38 41 41 34 34
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Exceedance to noise management level cell shading key
35 dBA during standard construction hours
Complies with standard hours noise management levels
Receiver ID Receiver location
Construction activity scenario (refer to Table 6-4)
1 2 3 4 5 6 7
R09 9 Cadonia Drive 30 42 36 39 39 32 32
R10 7 Cadonia Drive 29 41 35 38 39 31 31
R1179 Twelve Mile Road
29 42 35 39 39 31 31
R1259 Twelve Mile Road
28 41 34 38 38 30 30
R13 32 Cadonia Place 27 39 33 36 38 31 31
Vibration predictions
The nearest residential receivers are located approximately 500 metres from the proposed site.
At this distance it is expected that vibration from the proposed equipment will be negligible and
an assessment of vibration impacts is not deemed necessary for this proposal.
Construction traffic noise assessment
With regard to construction traffic using local roads, it is likely that there will be an increase of
more than 2 dB at a number of the nearest residential receivers. However, noise modelling
predicts that noise emission from the increase of traffic on Goolma Road due to construction
traffic will be below the noise criteria presented in Table 6-3. Daily construction vehicle
movements on the Mitchell Highway would not be significant when compared with the existing
traffic volumes in this road. As a result, no impacts from construction traffic movements are
expected.
Summary of noise impacts
During standard recommended hours the noise affected construction noise management level
of 40 dBA is predicted to be exceeded during some stages. The highly noise affected
construction noise management level of 75 dBA during standard recommended hours is not
predicted to be exceeded at all residential receivers.
Outside of standard hours the noise affected construction noise management level of 35 dBA is
predicted to be exceeded during the majority of stages. Based on the levels presented above,
the LAmax noise levels from construction activities may exceed the screening assessment level of
45 dBA. However, maximum internal noise levels at all residential receivers are likely to be
below the Road Noise Policy criteria of 50-55 dBA and therefore, sleep disturbance is unlikely to
occur.
6.2.3 Operational impacts
Methodology
The Industrial Noise Policy (EPA, 2000) provides guidance on the assessment of operational
noise impacts. The guidelines include both intrusive and amenity criteria that are designed to
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protect receivers from noise significantly louder than the background level and to limit the total
noise level from all sources near a receiver.
The intrusive noise criteria controls the relative audibility of operational noise compared to the
background level at residential receivers. The intrusive criteria are determined by a 5 dB(A)
addition to the measured (or adopted) background level with a minimum of 35 dB(A). The INP
recommends that the intrusive noise criteria for the evening period should not exceed the
daytime period and the night-time period should not exceed the evening period. The intrusive
noise criteria are only applicable to residential receivers.
The amenity criteria control the total level of extraneous noise for all receiver types. The amenity
criteria are determined based on the overall acoustic characteristics of the receiver area, the
receiver type and the existing level of noise from commercial or industry in the area.
Both the intrusive and amenity criteria are calculated and, in the case of continuous noise
sources, the lower of the two in each time period (day, evening and night) normally apply.
Given the location of the site, noise monitoring has not been conducted and an adopted
background noise level of 30 dB(A) has been selected. As such, the relevant operational noise
criteria for all times of the day, evening and night is 35 dB(A).
The Road Noise Policy provides criteria for the assessment of noise emission from additional
traffic on existing roads due to new developments. Table 6-8 below presents the relevant criteria
from the Road Noise Policy.
Table 6-8 Road noise policy criteria
Roadcategory
Type of project/land use
Assessment criteria – dB(A)
Day (7 am – 10 pm)
Night (10 pm – 7 am)
Arterial roads
Existing residence affected by additional traffic on arterial roads generated by land use developments
60 Leq(15hr) 55 Leq(9hr)
Local roads
Existing residence affected by additional traffic on local roads generated by land use developments
55 Leq(1hr) 50 Leq(1hr)
Operational and road traffic noise predictions
Operational activities at the correctional facility are expected to involve the following noise
generating activities:
General activities, including outdoor activities
Mechanical plant, however the majority of mechanical plant is located within an internal
plant room
Car park usage
Noise emission from traffic using arterial and local roads to access the proposed site are based
on the numbers provided in the traffic section of this report. Please refer to section 6.3 for
specific numbers of traffic movements.
Noise emission from the use and operation of the correctional facility is expected to be similar to
that of the current operations. Noise modelling was also conducted for operational noise using
the same methodology as the construction assessment above. Results of the operational noise
emission assessment and road traffic noise assessment are provided below in Table 6-9.
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Table 6-9 Predicted operational and road traffic noise levels at
representative sensitive receivers, dBA
Location Operational noise Road traffic noise
Noise
emission
level
LAeq,15 min
Criteria Daytime
noise
level
(7 am to 10 pm)
LAeq, 1hr
Daytime
criteria
Night-time
noise
level
(10 pm to 7 am)
LAeq, 1hr
Night-time
criteria
Goolma Road 26
35
43
55
40
50
28 Cadia Place 27 39 36
27 Cadia Place 27 40 36
22 Cadia Place 26 38 35
21 Cadia Place 26 39 35
14 Cadia Place 24 38 34
6 Cadia Place 24 38 34
7 Cadia Place 24 38 34
9 Cadonia Drive 23 37 34
7 Cadonia Drive 22 37 34
79 Twelve Mile Road
24 40 36
59 Twelve Mile Road
26 42 39
32 Cadonia Place 22 36 33
The results in Table 6-9 above demonstrate that all operational and road traffic noise levels
comply with the relevant criteria presented above.
6.2.4 Mitigation
Construction and demolition
It is expected that the construction and demolition works will be conducted in accordance with
the ICNG. As such, works should be undertaken with consideration to the following mitigation
measures:
Regularly train workers and contractors (such as at the site induction and toolbox talks)
on the importance of minimising noise emissions and how to use equipment in ways to
minimise noise.
Avoid any unnecessary noise when carrying out manual operations and when operating
plant.
Ensure spoil is placed and not dropped into awaiting trucks.
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Avoid / limit simultaneous operation of noisy plant and equipment within discernible range
of a sensitive receiver where practicable.
Switch off any equipment not in use for extended periods e.g. heavy vehicles engines will
be switched off whilst being unloaded.
Avoid deliveries at night/evenings wherever practicable.
No idling of delivery trucks.
Keep truck drivers informed of designated vehicle routes, parking locations and
acceptable delivery hours for the site.
Minimise talking loudly; no swearing or unnecessary shouting, or loud stereos/radios
onsite; no dropping of materials from height where practicable, no throwing of metal items
and slamming of doors.
Maximise the offset distance between noisy plant and adjacent sensitive receivers and
determining safe working distances.
Use the most suitable equipment necessary for the construction works at any one time.
Direct noise-emitting plant away from sensitive receivers.
Regularly inspect and maintain plant to avoid increased noise levels from rattling hatches,
loose fittings etc.
Use quieter construction methods where feasible and reasonable.
The community should be notified prior to any out of hours works commencing.
The use of noisy equipment should be minimised during the night time period.
Activities involving large earth moving equipment should not be conducted outside of
standard working hours. It may be possible to conduct construction activities that have
lower noise emission, or conduct internal fit out works.
Operational
Noise emission from the proposal is unlikely to exceed the relevant noise emission criteria of
35 dBA at any time of the day, evening or night-time.
Should operations vary from those detailed above, and noise complaints be received from
nearby residential receivers, an assessment and measurements should be conducted and
reasonable and feasible mitigation measures should be investigated.
6.3 Traffic and access
6.3.1 Existing environment
This section outlines the exiting conditions at the proposed site, including traffic conditions,
accessibility and the existing road network performance.
Functional road hierarchy
Roads are classified according to the functions that they perform. The main purpose of defining
a road’s functional class is to provide a basis for establishing the policies, which guide the
management of the road according to their intended service or qualities. Functional road
classification involves the relative balance of the mobility and access functions.
In terms of functional road classification, State roads are strategically important as they form the
primary network used for the movement of people and goods between regions within Sydney,
and throughout the State. State roads are the responsibility of the Roads and Maritime Services
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(RMS) to fund, prioritise and carry out works. State roads generally include roads classified as
Freeways, State Highways, and Main Roads under the Roads Act 1993, and the regulation to
manage the road system is stated in the Australian Road Rules (National Road Transport
Commission, 1999).
RMS generally define four levels in a typical functional road hierarchy, ranking from high
mobility and low accessibility, to high accessibility and low mobility.
These road classes are:
Arterial roads – controlled by RMS, typically no limit in flow and designed to carry vehicles
long distance between regional centres.
Sub-arterial roads – can be managed by either council or RMS under a joint agreement.
Typically their operating capacity ranges between 10,000 and 20,000 vehicles per day,
and their aim is to carry through traffic between specific areas in a subregion, or provide
connectivity from arterial road routes (regional links).
Collector roads – provide connectivity between local sites and the-arterial road network,
and typically carry between 2,000 and 10,000 vehicles per day.
Local roads – provide direct access to properties and the collector road system and
typically carry between 500 and 4,000 vehicles per day.
Goolma Road
Goolma Road functions as an arterial road and provides access to the existing Wellington
Correctional Facility, located to the north of Wellington Town Centre. Goolma Road forms a
priority controlled T-intersection with Mitchell Highway, and provides access between Gulgong
in the east and Wellington in the west.
Goolma Road has the following characteristics:
The road has two way sealed carriageway approximately seven metres wide
Dashed centreline road marking
Sign posted speed limit of 100 kilometres per hour.
Mitchel Highway
Mitchel Highway functions as a national arterial road which provides access through the
northern and central regions of NSW and southern regions of Queensland. The highway is a
main arterial route for heavy vehicles passing through centres such Dubbo located to the north-
west of Wellington, and Orange to the south of Wellington.
Mitchell Highway has the following characteristics in the vicinity of the proposed development
site:
Two-way sealed carriageway and sealed shoulders approximately seven metres wide
Centreline road markings
Auxiliary passing lane at the Goolma Road intersection
Sign posted speed limit of 60 kilometres per hour at the Goolma Road intersection; with
generally a sign posted speed limit 80 km/hr outside the study area.
Historical background traffic growth
The following historical traffic growth trends were observed from available RMS traffic count
data for a 10-year period between 1995 and 2005:
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2% linear growth per annum on Mitchel Highway, near Goolma Road
A negative growth rate of -0.5% on Goolma Road
For a conservative assessment, the following background growth rates have been assumed for
this study:
2% linear growth per annum on Mitchel Highway, near Goolma Road
1% linear growth per annum on Goolma Road.
These traffic growth rate have been assumed to estimate future background traffic volumes for
the roads in the vicinity of the proposed development site.
Existing daily and peak hour traffic
2016 traffic count data for Goolma Road and Mitchell Highway was obtained by extrapolating
data from 2005 RMS Annual Average Daily Traffic (AADT) counts.
A summary of the 2016 AM peak, PM peak and AADT volumes for the roads in the study area
are provided in Table 6-10. The existing traffic volumes along the roads in the study area are
within the functional classification range identified in section 6.3.1.
Table 6-10 Estimated traffic volumes 2016
Location AM peak hour PM peak hour AADT (vpd) HCV%
Goolma Road 992
992
9921
9
Mitchell Highway
at Macquarie
Bridge
8912
8912
8,9061
9
Note:
(1) Average Annual Daily Traffic was estimated by extrapolating 2005 RMS AADT counts with 2% per year growth
factor assumed for Mitchel Highway, and -0.5% per year for Goolma Road
(2) Peak hour traffic volumes assumed to be 10% of average daily traffic
(3) HCV – Heavy Commercial Vehicles
Existing intersection performance
The SIDRA 7 intersection modelling software was used to assess the proposed peak hour
operating performance of intersections on the surrounding road network. The criteria for
evaluating the operational performance of intersections is provided by the Guide to Traffic
Generating Developments (RMS, 2002) and reproduced in Table 6-11.
The criteria for evaluating the operational performance of intersections is based on a qualitative
measure (i.e. Level of Service (LoS)), which is applied to each band of average vehicle delay. It
is noted that LoS ‘D’ is generally an accepted operating condition along urban roads.
Table 6-11 Level of service criteria for intersections
Level of service Average delay per
vehicle (secs/veh)
Traffic signals, roundabouts Give way and stop signs
A < 14 Good operation Good operation
B 15 to 28 Good with acceptable
delays and spare capacity
Acceptable delays and
spare capacity
C 29 to 42 Satisfactory Satisfactory, but accident
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Level of service Average delay per
vehicle (secs/veh)
Traffic signals, roundabouts Give way and stop signs
study required
D 43 to 56 Operating near capacity Near capacity and
accident study required
E 57 to 70 At capacity; at signals,
incidents will cause
excessive delays
Roundabouts require other
control modes
At capacity, requires
other control mode
F > 70 Over Capacity
Unstable operation
Over Capacity
Unstable operation
Source: Guide to Traffic Generating Developments (RMS 2002)
Notes:
1. The average delay for priority-controlled intersections is selected from the movement on the approach with
the highest average delay.
2. The level of service (LoS) for priority-controlled intersections is based on the highest average delay per vehicle for the most critical movement.
3. The degree of saturation is defined as the ratio of the arrival flow (demand) to the capacity of each approach.
A summary of the weekday AM and PM peak hour SIDRA interaction modelling results is shown
in Table 6-12 for the Mitchell Highway/Goolma Road intersection. The SIDRA modelling
indicates that the intersection currently operates satisfactorily during both the AM and PM peaks
with LOS A. Detailed performance of this intersection is shown in Appendix D.
Table 6-12 Existing 2016 SIDRA intersection performance
Intersection AM peak PM peak
Average
delay
LoS Control
type
Degree of
saturation
Average
delay*
LoS Control
type
Degree of
saturation
Goolma
Road /
Mitchell
Highway
6.9 A Give
way
0.105 7.2 A Give
way
0.111
Note:
1.* Average delay is given in seconds per vehicle.
2.** LoS – Level of Service
Public transport
Wellington Railway Station is serviced by regular train services to Dubbo, Orange, Bathurst,
Lithgow and Sydney. Charter coach services also operate between Wellington and major
centres.
A local bus service (TLDW – Wellington to Dubbo) operates around the town of Wellington,
operates four services Monday to Friday.
There are no public transport services that runs along Goolma Road to the Correctional Facility.
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Crash data review
Crash data for the study area was obtained from the Transport for NSW centre for Road safety
website. The interactive crash statistics provides the number, severity and location of crashes
for a selected Local Government Area (LGA).
The study area was found to have two crashes during a 5 year period (2009 – 2015)
One serious injury crash located near the intersection of Mitchel Highway and Goolma
Road
One minor injury crash located near the existing facility.
See Figure 6-2 for crash locations and severity within the study area.
Figure 6-2 Crash locations
Source: Transport for NSW Centre for Road Safety
Key findings
The existing traffic volumes on the surrounding road network are within the expected
functional classification outlined by RMS
The intersection of Goolma Road and Mitchel Highway operates satisfactorily at LoS A
Transport to and from the proposed correctional facility will depend on private vehicles for
mode of travel.
6.3.2 Construction and demolition impacts
Based on traffic generation data provided by DJ, it is estimated that during the construction and
demolition periods, up to 300 light vehicles and 50 heavy vehicles per day will be required for
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construction, seven days a week. This equates to 600 light vehicle movements and 100 heavy
vehicle movements per day.
For the purposes of this assessment, it has been assumed that:
Each shift would generate 300 light vehicle movements, with 150 arrivals at the start of
the shift and 150 departures at the end of the shift.
As the construction heavy vehicles do not have peak periods, it is assumed that traffic is spread
evenly throughout the day. This equates to 100 heavy vehicle movements over 16 hours,
resulting in around six heavy vehicle movements per hour.
For the purposes of this assessment, it has been assumed that construction routes for light and
heavy vehicles would be:
50% from Mitchell Highway north, to/from Dubbo
50% from Mitchell Highway south, to/from Wellington town centre.
The assumed construction routes are shown in Figure 6-3. Some construction traffic could also
access the site from Mudgee via Goolma Road to the northeast of the site. However, the above
traffic distribution assumption provides a worst case assessment of the construction traffic
impacts at the Mitchell Highway/Goolma Road intersection.
Figure 6-3 Construction traffic routes
Source: Google Maps modified by GHD
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The estimated number of construction vehicles entering and leaving the site during the peak
periods is shown in Table 6-13.
Table 6-13 Forecast construction traffic generation
Type Daily AM PM
Inbound Outbound Inbound Outbound Inbound Outbound
Light vehicles 300 300 150 0 0 150
Heavy vehicles 50 50 3 3 3 3
Source: Department of Justice NSW modified by GHD
Construction of the proposal is expected to occur in 2016, with the demolition of the
development expected to occur during 2023. The intersection modelling software, SIDRA 7, was
used to assess the operational performance of the Mitchell Highway/Goolma Road intersection
during the construction/demolition phases for the proposal.
Table 6-14 provides a summary of the weekday AM and PM peak SIDRA results for Mitchell
Highway/Goolma Road intersection during the construction / demolition of the proposal, in 2016
and 2023 respectively. The SIDRA results indicate that intersection is expected to operate
satisfactorily, at LoS A during the weekday AM and PM peak periods during both the
construction and demolition phases of the development. Detailed performance measures can be
seen in Appendix D.
Table 6-14 2016 Construction phase intersection performance
Intersection Phase AM peak PM peak
Avera
ge
dela
y
LoS
Contro
l
type
Degre
eof
satu
ratio
n
Avera
ge
dela
y*
LoS
Contro
l
type
Degre
eof
satu
ratio
n
Goolma
Road /
Mitchell
Highway
2016
construction
7.9 A Give
way
0.129 7.3 A Give
way
0.157
2023
demolition
78.0 A Give
way
0.135 7.4 A Give
way
0.241
1.* Average delay is given in seconds per vehicle.
2.** LoS – Level of Service
6.3.3 Operational impacts
Proposed traffic generation
Details of expected traffic movements to and from the proposed development, including staff
shifts times, visiting times, deliveries and operational vehicles were provided by DJ, as
summarised in Table 6-15.
Table 6-15 Forecast traffic movements
Type Number of vehicles – arriving Number of vehicles – departing
Staff Vehicles - AM
Shift
Mon- Fri: 23 Overseers, 43
custodial, 12 Admin, 10
Mon-Fri: Approximately 88 staff in
total departing between 4-6 pm.
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Type Number of vehicles – arriving Number of vehicles – departing
programs staff. Total: 88
vehicles arriving between 6-8
am.
Sat-Sun: 55 Total – arriving
between 6 am – 8 am
Sat-Sun: 55 Staff - All leaving
between 4-6 pm
Staff Vehicles - PM
Shift
7 days per week: 19 custodial
and 13 overseers arriving
between 5 pm-7 pm
Approximately 32 staff departing
between 6:30 – 8:30 am
Industries
Deliveries /
Pickups
Approximately ten trucks per
day
Ten trucks over business hours
Visits – AM Approximately 180 visits over
course of weekend
Assume 180 Vehicles staggered
from 8 am – 4 pm
180 over weekend
Visits – PM Nil Nil
General
Provisioning /
Maintenance
Vehicles
Approx. 5 maintenance vehicles
7 days (utes and trucks)
Approx. 5 maintenance vehicles 7
days
Escort Vehicles 2 escort vehicles per day 2 escort vehicles per day
Source: NSW Department of Justice
Based on the traffic generation data provided by DJ, the forecast daily traffic generation for the
proposed development is shown in Table 6-16. The proposal is expected to generate 317 in
bound and 317 outbound trips per day.
This traffic generation provided in Table 6-15 was used to determine AM and PM peak hour
traffic based on the following conservative assumptions:
All AM, PM and weekend peak period traffic assumed to arrive and depart the site during
the peak hour
10% of deliveries and general traffic to occur during the weekday AM, PM and weekend
peak hour
One escort vehicle to access the site during the AM, PM and weekend peak hours.
A summary of the vehicle movements is shown in Table 6-16 weekday AM and PM peak
periods, with a summary of the weekend traffic generation provided in Table 6-17.
While visitors have been kept to weekends only, total weekday trips are higher due to more staff
accessing the site. Weekday trips are considered to be the worst case scenario to determine
traffic impacts on the local road network.
Table 6-16 Forecast daily and peak hour traffic generation – weekday
# Type Daily AM PM
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Inbound Outbound Inbound Outbound Inbound Outbound
1 Staff Vehicles 120 120 88 32 32 88
2 Deliveries /
Pickup*
10 10 1 1 1 1
3 Visits* - - - - - -
4 General
Provision /
Maintenance*
5 5 1 1 1 1
5 Escort
Vehicles*
2 2 1 1 1 1
Total 317 317 91 35 35 91
Note: *Visitors staggered across the weekend; Peak hour vehicle trips assumed to be about 10% of total daily trips
Table 6-17 Forecast daily and peak hour traffic generation – weekend
# Type Daily AM PM
Inbound Outbound Inbound Outbound Inbound Outbound
1 Staff Vehicles 87 87 55 32 32 55
2 Deliveries /
Pickup*
10 10 1 1 1 1
3 Visits* 180 180 10 10 - -
4 General
Provision /
Maintenance*
5 5 1 1 1 1
5 Escort
Vehicles*
2 2 1 1 1 1
Total 284 284 68 45 35 58
Note: *Visitors staggered across the weekend; Peak hour vehicle trips assumed to be about 10% of total daily trips
Traffic distribution
The traffic distribution for the forecast operational traffic is based on existing vehicular routes
made by staff and visitors at current Correctional facility site. These traffic distributions are
provided from the Proposed Mid-Western Correctional Centre at Wellington, NSW Traffic Impact
Assessment report (Traffix, 2003). Based on this report, the following assumptions have been
made for the proposed development:
93% of traffic accessing the site from the south, along Goolma Road
– 58% of traffic would travel along the Mitchell Highway, south of Goolma Road
– 35% of traffic would travel along the Mitchel Highway, north of Goolma Road
7% of traffic accessing the site from the north, along Goolma Road.
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These traffic distributions were applied to the proposed traffic generated trips in Table 6-16 and
Table 6-17 to determine the forecast traffic movements at the Mitchell Highway / Goolma Road
intersection.
Intersection performance
The temporary correctional facility is expected to operate for up to a maximum of five years from
the proposed start of operation, expected to commence in March 2017. Table 6-18 provides a
summary the AM and PM peak hour SIDRA modelling results for the Mitchell Highway/Goolma
Road intersection for the with and without development scenarios in 2023, as this represents
the end of the operational phase of the proposal. It should be noted that no intersection
modelling has been undertaken for the weekend peak, as the weekday AM and PM peak
provides the worst case assessment of this intersection, based on the forecast trip generation
for the site.
The SIDRA modelling indicates that the proposal would result in a negligible change in
intersection performance during both the weekday AM and PM peak periods in 2023. The
Mitchell Highway/Goolma Road intersection is expected to continue to operate satisfactorily at
LoS A, at the end of the operation of temporary facility in 2023. Detailed performance measures
are provided in Appendix D.
Table 6-18 SIDRA intersection performance 2023 scenarios
Intersection AM peak PM peak
Avera
ge
dela
y
LoS
Contro
l
type
Degre
eof
satu
ratio
n
Avera
ge
dela
y*
LoS
Contro
l
type
Degre
eof
satu
ratio
n
Goolma
Road /
Mitchell
Highway
Without
development
6.5 A Give
way
0.128 6.6 A Give
way
0.117
With
development
8.1 A Give
way
0.238 6.7 A Give
way
0.188
1.* Average delay is given in seconds per vehicle.
2.** LoS – Level of Service
Site access and parking
Sight distance
Access to the temporary correctional facility will be from Goolma Road. A new intersection and
access road would be required, which would be located around 550 metres to the south of the
existing correctional facility access road.
In assessing this proposed development, it is appropriate to assess the traffic safety of the
proposed entry/exit locations to/from the site. This is undertaken by determining whether there
is adequate longitudinal sight distance at the proposed access to allow drivers approaching the
driveway sufficient site distance to avoid potential conflicts. The specific sight distance criteria
used in the report has been derived from the Guide to Traffic Engineering Practice, Part 5:
Intersections at Grade (Austroads, 2005) which specifies the following:
Approach sight distance (ASD)
This is the minimum requirement to provide the driver of a vehicle adequate distance to observe
the road layout in sufficient time to react and stop if necessary before entering the conflict area.
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Approach sight distance is measured from driver eye height (1.15 m to 0.0 m, i.e. the road
surface).
Safe intersection sight distance (SISD)
This provides sufficient sight distance for a driver of a vehicle on the major road to observe the
vehicle from the minor road approach moving into a collision situation and to decelerate to stop
before reaching the collision point. Safe intersection sight distance is measured from the driver
eye height (1.05 m) to (1.05 m).
Table 6-19 shows the sight distance requirements at the access road. As the entrance is to be
located on a straight alignment of road (approx. 1 km+) and relatively flat grade, this gives
optimal sight distance conditions.
Table 6-19 Sight distance requirements
Driveway (entry /
exit)
ASD (minimum requirement) SISD (desirable requirement)
Required Measured Required Measured
Goolma road 160m+250 m (north)
+250 m (south) 240 m
+250 m (north)
+250 m (south)
Source: “Guide to Traffic Engineering Practice, Part 5: Intersections at Grade” (2005)
Parking
The number of parking spaces required for the proposal has been determined based on the
expected maximum number of staff and visitors accessing the site at the same time. This is
summarised in Table 6-20, which indicates that a minimum of 133 spaces would be required.
It is assumed that the morning and evening shifts at the proposed development would overlap,
to allow for staff handover at the facility. visitors expected at the site at during certain visiting
times spread over the weekend, assuming up to ten visitors per hour.
Table 6-20 Minimum number of required parking spaces
# Type Vehicle movements Minimum parking
spaces AM PM
1 Staff Vehicles 88 32 120
2 Deliveries / Pickup* 1 1 1
3 Visitors 10 - 10
4 General Provision /
Maintenance*
1 1 1
5 Escort Vehicles* 1 1 1
Total 133
Note: Assumes No public transport to centre for staff, so each staff member is utilising a vehicle
From the proposed carpark layout plan shown in Figure 6-4, about 160 parking spaces have
been allocated for the proposed site. This proposed number of parking spaces satisfies the
minimum number of parks as estimated in Table 6-20.
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Figure 6-4 Proposed carpark layout
Parking dimensions
Parking space measurements would be in accordance with AS 2890.1:2004 Parking Facilities,
Part 1: Off-street Car Parking (Australian Standards, 2004), the parking space measurements
will be as follows:
2.4 m wide
4.8 m long (car parking is controlled by a kerb which allows overhang)
Aisle width of 5.8 m.
Accessible parking spaces are to be provided in accordance with AS 2890.6 (2009) which
outlines that one space is required for every 100 car parking spaces.
Accessible parking measurements will be in accordance with AS 2890.6 (2009) Section 2.2.1,
which states a dedicated parking space of 2.4 m wide, 5.4 m long and must include a shared
area on one side of the space that is also 2.4 m wide and 5.4 m long.
6.3.4 Mitigation
Construction
A Construction Traffic Management Plan (CTMP) would be prepared by the Contractor in
consultation with NSW Department of Justice, and provided to Council and RMS as
required. The TMP would be the primary management tool to manage potential traffic
impacts associated with construction and demolition of the proposed works.
Consultation with the appropriate road authority would be undertaken for the proposed
operational changes to Goolma Road where a new intersection and road access is
required.
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Operational
During the operation phase, as the intersection at Goolma Road and Mitchel Highway are likely
to continue operating at a satisfactory standard, no mitigation measures would be required for
this stage of the development.
6.4 Air quality
6.4.1 Existing environment
A review of the National Pollutant Inventory (NPI) maintained by the Commonwealth
Department of Sustainability, Environment, Water, Population and Communities revealed that
there are no scheduled premises triggering the minimum threshold values of annual pollutant
releases operating within the Wellington LGA.
Data provided on the Wellington LGA by the NPI identifies that emissions of nitrogen and
phosphorus are generated from sources such as unimproved pastures and forestry as well as
from cropping activities in the area. The emissions from these sources are expected to be well
below the criteria outlined in the air quality guidelines.
The nearest potentially sensitive receptors to the proposal site include:
The State Government Soil Conservation Service located at 6582 Goolma Road,
approximately 340 metres from the western boundary of the site (and approximately 470
metres from the area that would be subject to the proposal)
Residential housing located within Cadonia Estate located at 6-28 Cadia Place,
Wuuluman, approximately 125 metres from the south-eastern boundary of the site (and
approximately 340 metres from the area that would be subject to the proposal)
6.4.2 Construction and demolition impacts
Construction and demolition of the proposal may impact local air quality through the generation
of dust by excavation, construction vehicles driving over exposed soils and wind blowing over
stockpiles. Dust impacts have the potential to impact on the amenity of those occupying nearby
residential properties. The operation of construction plant and equipment would also result in
additional exhaust emissions in the area.
Impacts due to the generation of dust and exhaust emissions would be short term and
temporary and would be minimised by the implementation of the mitigation measures outlined in
section 6.4.4.
6.4.3 Operational impacts
Operation of the proposal is not expected to impact on local air quality.
6.4.4 Mitigation
Construction
The following mitigation measures would be included in the CEMP and implemented to ensure
that air quality impacts are minimised during construction:
All plant and machinery would be fitted with emission control devices complying with the
Australian Design Standards.
Machinery would be turned off when not in use and not left to idle for prolonged periods.
Dust generation would be monitored visually, and where required, dust control measures
such as water spraying would be implemented to control the generation of dust.
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Any waste (such as excavated spoil) produced on-site would be stored appropriately to
reduce the production of dust.
Materials transported to and from the site would be covered to reduce dust generation in
transit.
Access points would be inspected to determine whether sediment is being transferred to
the surrounding road network. If required, sediment would be promptly removed from
roads to minimise dust generation.
Stabilisation of any excavated areas would occur as soon as practicable.
Fixed hoses would be used to dampen exposed surfaces to minimise dust generation,
where required.
Operational
No additional mitigation measures would be required.
6.5 Soils, erosion and water quality
6.5.1 Existing environment
Topography, geology and soils
Landforms within the vicinity of the site consist of mountain ranges, dissected plateaus
(tablelands), hills, ridges and plains. The topography of the site is generally flat as it has been
cleared and levelled for the purposes of the existing facility.
The geological map (Wellington 1:100,000 scale Geological Sheet No. 8632) indicates that the
study area is underlain by two geological formations, the Barnby Hills Shale and Cuga Burga
Volcanics. The interface of the geological formations strikes approximately north-north-east to
south-south-west through the study area. The Barnby Hills Shale is described as poorly bedded
to laminated, buff to brown to grey, quartzose shale and siltstone; minor rhyolitic tuff and
tuffaceous sandstone; calcareous sandstone and siltstone. The Cuga Burga Volcanics are
described as latitic, crystal-lithic sandstone, breccia, siltstone, tuff; latitie and lesser andesite,
basalt; minor allochthonous limestone, quartzose sandstone.
The CSIRO Australian Soil Resource Information System identifies the site as having an
‘extremely low probability of occurrence’ for acid sulphate soils.
Surface water
A drainage line runs on a north-south alignment through the western portion of the study area.
Outside of, but within the immediate vicinity of the study area, a dam has been constructed to
capture water from the drainage line. Refer to Figure 1-2. Wuuluman Creek, a tributary to the
Macquarie River, is located 150 metres from the study area at its nearest point. The Macquarie
River is located approximately five kilometres south of the site at its nearest point.
The proposal site is not identified as a flood hazard area as per the Wellington LEP 2012
mapping.
Groundwater
A search of the NSW Natural Resource Atlas (NRAtlas) online identifies that there are no
groundwater bores located within the site or study area. The nearest bore is located at Caves
Road, Apsley, approximately 13 kilometres from the site.
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6.5.2 Construction and demolition impacts
General erosion impacts
The proposal would not result in any impacts to the local topography.
Construction and demolition of the proposal would involve minor excavation and stockpiling of
soils. Excavation and stockpiling activities, if not adequately managed, could have the following
impacts:
Erosion through exposed soils and stockpiled materials.
Dust generation from excavation works, and vehicle movement over exposed soils.
An increase in sediment loads entering the stormwater system and the nearby receiving
waterways.
These impacts are considered to be minimal as exposure of soils and stockpiling of spoil would
be temporary and short term. Potential impacts would be minimised by implementing the
mitigation measures provided in section 6.5.4.
Ground water
Contamination of groundwater may occur through the seepage from material and waste
stockpiles, or spills of fuels, oils or other chemicals. As there are no underground bores located
within close proximity to the site, impacts to ground water are not expected.
6.5.3 Operational impacts
Operation of the proposal would not impact topography, geology, soils or water quality at the
site. Aside from the building areas, the site would be covered in gravel or landscaped where
required. No erosion or sedimentation impacts are anticipated during operation.
6.5.4 Mitigation
Construction and demolition
The following mitigation measures would be included in the CEMP and implemented to
minimise potential impacts on soils and water quality during construction of the proposal:
General erosion control
Sediment and erosion control devices would be installed around work sites and
maintained to minimise the transport of sediment in accordance with Managing Urban
Stormwater, Soils & Construction, Volume 1 (Landcom 2004). These devices would be
inspected weekly and immediately after rainfall to ensure their effectiveness over the
duration of the works. Any damage to erosion and sediment controls would be rectified
immediately.
The area of exposed surfaces would be minimised and disturbed areas would be
stabilised progressively to ensure that no areas remain unstable for any extended length
of time.
Wherever possible, reuse soil and sediment that accumulates in erosion and sediment
control structures during site restoration unless it is contaminated or otherwise
inappropriate for reuse.
Cease work in the immediate vicinity of any areas of suspected contamination that are
identified prior to or during work. Ensure that these areas are not disturbed and are
cordoned off as a safety risk.
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Vehicle and machinery movement would be confined to designated roads, tracks,
pathways and work areas. Designated lay-down areas would be selected to minimise
erosion or vegetation damage.
Manage stockpiles by implementing sediment and erosion control devices in accordance
with Managing Urban Stormwater, Soils & Construction, Volume 1 (Landcom 2004)
Cease work during heavy rainfall events when there is a risk of sediment loss off-site or
ground disturbance due to water logged conditions.
Ensure equipment, plant and materials are placed in designated areas where they are
least likely to cause erosion.
Following completion of work, restore land surfaces to as close as possible to pre-existing
conditions.
Operational
No additional mitigation measures would be required.
6.6 Flora and Fauna
6.6.1 Methodology
Desktop review
The assessment included a review of background ecology information obtained from database
searches and reviews. These searches included:
Office of Environment and Heritage (OEH) Atlas of NSW Wildlife database– licensed data
for search of all terrestrial threatened flora and fauna species (within a 10 kilometre radius
of proposal site) (searched June 2016) (OEH 2016a).
OEH (2016b) NSW threatened species, online profiles.
Department of the Environment (DotE) (2016a) EPBC Act Protected Matters Search Tool
– for a 10 kilometre radius around the proposal site (searched June 2016).
DotE (2016b) Species profile and threats database, online profiles.
Department of Primary Industries (DPI) Noxious weed declarations – Wellington LGA
control area (DPI 2016) (searched June 2016).
Field surveys
Flora and fauna field surveys were conducted by an ecologist on 27 June 2016. Where
appropriate, field surveys were conducted in accordance with the Threatened Biodiversity
Survey and Assessment: Guidelines for Developments and Activities Working Draft
(Department of Conservation (DEC), 2004).
The primary objectives of the field surveys were to:
Determine the presence and/or potential for threatened flora and fauna species,
populations, ecological communities, listed under the NSW TSC Act and Commonwealth
EPBC Act, and their habitats to occur in the study area.
Determine the value of the habitat in the study area for flora and fauna species,
particularly for threatened species and species of conservation significance, and describe
potential impacts that would result from the proposal.
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Describe the flora and fauna species, habitat, populations and ecological communities in
the study area in relation to their occurrence and quality in the locality. This included
ground truthing, reference to aerial photographs and vegetation mapping.
Determine the condition and extent of vegetation removal required for the proposal.
Survey effort for this project is summarised in Table 6-21.
Table 6-21 Survey effort for ecological assessment
Survey method Effort
Flora plot (see Figure 6-5) One 20 metre by 20 metre plot to assess Box-
Gum Woodland (derived grassland) in the
study area.
Flora transects (see Figure 6-5) Two flora survey transects through the
proposal site and part of the study area.
Fauna habitat assessment Potential fauna habitat identified within areas
of potential vegetation clearing and adjacent
areas, including searches for specific habitat
features such as hollow-bearing trees.
Opportunistic fauna observations Opportunistic fauna observations for all fauna
species encountered during flora surveys and
habitat assessment.
Flora
Flora surveys were conducted in the study area using a plot survey and random meandering
transect surveys (Figure 6-5).
Two 20 metre by 50 metre flora survey plots were surveyed. Within each plot the following
vegetation and habitat characteristics were recorded:
Description of vegetation
Groundcover species and abundance
Any signs of previous disturbance and grazing.
Two flora transects (random searches) were surveyed through the study area. As rare plants
often exist in discrete populations in specific areas, a random search can increase the
probability of finding rare plant populations. A random search effort also encompasses a greater
portion of the landscape, as the search is not limited to specific areas (only the stratification
unit), and is useful in surveying difficult terrain and irregular shaped search areas.
Vegetation mapping
Surveys of vegetation communities were undertaken to characterise vegetation formation, class,
structure and condition. Plant community composition is especially important for those areas
that have the potential to be a threatened ecological community.
Flora surveys enabled determination of the composition and extent of ecological communities
occurring in the study area. The study area was investigated by random meandering transects
to identify vegetation communities present and to identify any areas with the potential to be
classified as a threatened ecological community.
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Native vegetation in the study area was initially assigned a vegetation community name based
on observed floristic and structural characteristics. Intact native vegetation communities were
defined according to NSW Plant Community Type (PCT) classifications used in the OEH
Vegetation Information System (OEH 2016c). Introduced or highly modified native vegetation
was defined based on structure and species composition. All vegetation communities were
mapped using aerial photographic interpretation guided by the field survey results and GPS
data.
For areas with the potential to classify as a threatened ecological community, an analysis was
undertaken using the criteria for classification under the TSC Act and EPBC Act. The flora
survey plot was located in an area that had the potential to meet the classification criteria for the
ecological community ‘White Box Yellow Box Blakely's Red Gum Woodland’ (TSC Act) and
‘White Box-Yellow Box-Blakely’s Red Gum Grassy Woodland and Derived Native Grassland’
(EPBC Act) (both referred to as Box-Gum Woodland). This threatened ecological community is
listed as endangered under the TSC Act and critically endangered under the EPBC Act. The
plot was surveyed as detailed above.
Fauna
Fauna surveys comprised a habitat assessment for all fauna groups, observations of fauna
signs and opportunistic observations of fauna during flora surveys. Fauna habitat resources
were assessed to identify areas of potential habitat within the study area. Specific resources
such as shelter, basking, roosting, nesting and foraging sites for birds, bats, arboreal mammals,
amphibians, ground-dwelling mammals and reptiles were noted.
Habitat assessment
Habitat details recorded included presence or absence of:
Hollow-bearing trees (arboreal mammals, hollow-nesting birds and microchiropteran
bats).
Woody debris (birds and reptiles).
Feed trees (e.g. Allocasuarina spp. and mistletoe).
Waterbodies (amphibians).
Nests (birds).
Rocky outcrops (reptiles).
Other features likely to provide potential habitat for threatened fauna.
Searches for potential mammal, amphibian, and reptile habitat were undertaken and recorded
during flora surveys.
Birds
Species observed at other times (such as during flora surveys) were recorded as opportunistic
observations.
Observations of fauna signs
Any indirect evidence of fauna (e.g. scats, feathers, fur, tracks, dens, nests, scratches, chew
marks and owl wash) was recorded and/or photographed.
Assessment of the likelihood of occurrence of listed biota
An assessment of the likelihood of occurrence and possibility of impact was completed for listed
species, populations and ecological communities with the potential to occur in the study area.
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In assessing which of these species, populations and ecological communities are ‘likely’ to
occur within the study area (as described in Threatened Biodiversity Survey and Assessment:
Guidelines for Developments and Activities Working Draft) (DEC 2004) the following factors
were taken into consideration:
The presence of potential habitat within the study area
Condition and approximate extent of potential habitat within the study area
Species occurrence within the locality and region (including results of current and
previous surveys and results of database searches and literature review).
In addition, the possibility of impact by the proposal on threatened biota likely to occur or
present was assessed, and therefore whether an EP&A Act assessment of significance and/or
EPBC Act significance assessment was required to assess the significance of the impact.
Assessment of the potential impacts on listed biota
As the proposal is unlikely to impact any species or ecological communities listed under the
TSC Act or EPBC Act, no assessments of significance were required.
Development of safeguards and management measures
Safeguards and management measures for the proposal were developed based on the site
conditions and the potential impacts of the proposal (refer to section 6.6.4).
6.6.2 Existing environment
Vegetation communities
Vegetation in the study area is shown in Figure 6-5.
Scattered Kurrajong (Brachychiton populneus) trees are present throughout the study area
(Figure 6-6). These are consistent with the vegetation formation Grassy Woodlands and the
vegetation class ‘Western Slopes Grassy Woodlands’ (Keith 2004). The scattered Kurrajong
trees also form the following NSW Plant Community Type listed in the NSW Vegetation
Information System:
‘Derived Kurrajong grassy open woodland / isolated trees in the Brigalow Belt South
Bioregion and Nandewar Bioregion’ (PCT ID 436).
This vegetation community is a derived open woodland form of cleared grassy White Box
woodland. Although White Box (Eucalyptus albens) trees were not observed during surveys,
they are present in the locality and are likely to have been present in the study area previously.
White Cypress Pine (Callitris glaucophylla), which is an associated species of the vegetation
community, is present in the study area. In NSW, the groundcover composition of the vegetation
community varies due to soils and disturbance history including grazing, cropping and fertiliser
use. In the study area, the groundcover vegetation is largely degraded and dominated by
introduced species due to these factors (Figure 6-7). It is therefore unlikely to meet the
classification criteria for the threatened ecological community Box-Gum Woodland, either under
the TSC Act or the EPBC Act.
An area of native derived grassland north of the proposal site is dominated by Wallaby Grass
(Rytidosperma bipartitum) (Figure 6-8). This grassland is grazed and has a relatively low
diversity of flora species, with substantial cover of introduced species (see ‘P1’ data in Appendix
E). Due to the likely prior dominance of White Box and the dominance of native groundcover
vegetation, this derived grassland is consistent with the classification criteria for the threatened
ecological community Box-Gum Woodland, listed as endangered under the TSC Act.
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The derived grassland in the study area does not meet the classification criteria for the EPBC
Act form of Box-Gum Woodland ecological community due to the degraded nature of the
understorey vegetation.
Flora species
Recorded flora species
Field surveys identified 51 flora species, or which 16 are native and 35 are introduced. These
species are listed in Appendix E.
The dominant tree species within the study area is Kurrajong. Other native tree species
recorded include White Cypress Pine, and species present in a roadside planting north of the
proposal site, including White Box, Yellow Box (E. melliodora) and Rough-barked Apple
(Angophora floribunda). Introduced trees identified in the study area include Peppercorn
(Schinus areira) and Tree of Heaven (Ailanthus altissima).
Shrubs are largely absent throughout the study area. African Boxthorn (Lycium ferocissimum) is
present under the Peppercorn trees in the north-western corner of the proposal site.
The groundcover vegetation in the proposal site is dominated by introduced flora species
including Star Thistle (Centaurea calcitrapa), clover (Trifolium sp.) and an introduced annual
grass species. The latter two species were unidentifiable to species level due to their early
growth stage.
An area of native derived grassland north of the proposal site is dominated by Wallaby Grass
(Rytidosperma bipartitum).
No threatened flora species listed under the TSC Act or EPBC Act were recorded in the study
area.
Noxious weeds
Three flora species listed as noxious for the Wellington Shire Council control areas (Department
of Primary Industries (DPI) 2016) were recorded during flora surveys (Table 6-22).
Table 6-22 Noxious weeds in the study area
Name Class Occurrence
African Boxthorn
Lycium ferocissimum
Four Uncommon. Few individuals
under Peppercorn trees in the
north-west corner of the
proposal site (see Figure 6-5).
Blue Heliotrope
Heliotropium amplexicaule
Four Uncommon. Scattered
individuals in the proposal
site.
Tree of Heaven
Ailanthus altissima
Four Uncommon. Present under a
Kurrajong tree in the proposal
site (see Figure 6-5).
Noxious weed classes are prescribed by DPI. All noxious weed species observed are classified
as class four weeds. This means the growth of the plant must be managed in a manner that
continuously inhibits the ability of the plant to spread and the plant must not be sold, propagated
or knowingly distributed.
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African Boxthorn is also listed as a weed of national significance under the National Weeds
Strategy.
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Figure 6-6 Kurrajong tree in the proposal site
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Figure 6-7 Introduced groundcover vegetation and peppercorn trees in
the proposal site
Figure 6-8 Derived grassland north of the proposal site
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Fauna
Fauna species
Surveys undertaken by GHD identified 15 fauna species. Of these, 13 species are native and
two species are introduced (refer to Appendix E). The species assemblage is typical of a
modified rural landscape. Thirteen bird species were identified during the field surveys. Some of
the commonly occurring native species include the Australian Magpie (Cracticus tibicen),
Magpie-Lark (Grallina cyanoleuca) and the Olive-backed Oriole (Oriolus sagittatus). No
threatened species were identified during the field surveys. No introduced bird species were
identified.
Two species of mammal were recorded during field surveys: the Eastern Grey Kangaroo
(Macropus giganteus) and the introduced Rabbit (Oryctolagus cuniculus). The study area is
unlikely to provide habitat for many native mammals due to the sparseness of the tree cover,
lack of hollow-bearing trees and degraded nature of the landscape. Other introduced mammals
likely to occur include the Fox (Vulpes vulpes) and Cat (Felis catus). No threatened species of
mammals were recorded during field surveys.
No amphibians were recorded during the field survey. Drainage lines in the study area (Figure
6-5) may provide habitat during periods of flow for commonly occurring species such as the
Eastern Sign-bearing Froglet (Crinia parinsignifera).
No reptile species were recorded during field surveys. Species likely to occur include snakes
such as the Eastern Brown Snake (Pseudonaja textilis).
Fauna habitat
Fauna habitat in the proposal site is limited and includes scattered paddock trees (none of
which contain hollows), derived native grassland north of the proposal site, and the planting in
the road reserve north of the proposal site.
Scattered Kurrajong and White Cypress Pine trees provide habitat for birds typical of degraded
rural environments. Olive-backed Orioles and Pied Butcherbirds (Cracticus nigrogularis) were
observed perching in these trees. A Grey Butcherbird (Cracticus torquatus) was observed
foraging for seeds from the fruits of the Kurrajong trees.
The derived native grassland may provide habitat for small lizards dependent on grassland
habitats. Grassland areas also provide foraging habitat for mammals such as the Eastern Grey
Kangaroo and birds such as the threatened Superb Parrot (Polytelis swainsonii).
Superb Parrots, and other species, are likely to use vegetation corridors in the locality as
avenues for movement. The connectivity of these corridors aids in facilitating the movement of a
range of fauna across the landscape, including woodland birds, mammals and other fauna. In
the study area, corridors are largely limited to narrow plantings along roads.
Very little woody debris habitat is present in the study area.
The drainage line in the north-west of the proposal site is intermittent, highly degraded through
the spread of weed species, and unlikely to provide important habitat for fauna, other than
resident frogs.
Threatened biota
Threatened biota observed during surveys
No threatened species were observed during field surveys.
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Likelihood of threatened biota occurring in the study area
The literature review, database search and field surveys identified one ecological community
(Box-Gum Woodland) listed under the EPBC Act and/or TSC Act as being present in the study
area. In addition, a number of threatened flora and fauna species were identified as having a
low likelihood of occurrence (refer to Appendix F).
6.6.3 Construction, operational and demolition impacts
Potential direct impacts
Construction
Native vegetation/habitat removal
The proposal would remove 10 scattered, mature native trees, including eight Kurrajong trees
and two White Cypress Pine trees (see Figure 6-5). The diameter at breast height of the trunks
of these trees generally ranges from 40 to 100 centimetres; however, none of the trees contain
hollows. The proposal would also remove about seven Peppercorn trees (see Figure 6-5).
The removal of these trees would reduce movement, perching and foraging resources for birds
typical of agricultural landscapes; however, they constitute only a small proportion of the trees in
the study area and locality. A large area of open woodland is present on hills about 800 metres
east of the proposal site. Surrounding areas of woodland contain native eucalypt species which
tend to be preferred by woodland bird species more sensitive to disturbance.
The proposal would remove about 18 hectares of introduced groundcover vegetation. No native
groundcover vegetation would be removed.
Habitat fragmentation and connectivity
Fragmentation of the vegetation in the study area has previously occurred largely through
development for agriculture. The study area already has very limited vegetation connectivity.
Removal of habitat has created barriers to movement for some fauna species, particularly those
that are limited by dispersal abilities and habitat preferences.
The small amount of vegetation removal is unlikely to result in significant additional
fragmentation to that which has already occurred. The proposal would not remove any large
areas of native vegetation, sever any important corridors or otherwise isolate any areas of
habitat.
Injury and mortality
Death or injury may occur to any fauna present during the clearing of trees during construction.
If birds are present but not nesting during construction they will generally move away from the
proposal site to escape the disturbance.
Potential indirect impacts
Water quality, chemical and fuel impacts on flora and fauna
A drainage line runs through the north-west corner of the proposal site. During periods of water
flow in the drainage line, sedimentation has the potential to affect flora and fauna that may use it
as habitat.
The proposal has the potential to cause impacts to flora and fauna through spills of fuels and
chemicals. This may occur during refuelling operations or during preparation and use of
chemicals for weed management. Spills could potentially contaminate habitat for species
dependent on the drainage line.
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As the proposal site is not in the vicinity of any creeks or wetlands it is unlikely that the proposal
would cause sedimentation or water quality impacts that could reach downstream waterbodies.
The proposal could also potentially affect flora through spray drift during application of
herbicides.
These impacts would be unlikely to be substantial due to the degraded nature of the proposal
site and the implementation of safeguards detailed in sections 6.5.4 and 6.6.4.
Weeds
The groundcover vegetation in the study area contains a range of introduced species. The
proposal has the potential to further introduce and spread weeds in the study area through the
movement of machinery and light vehicle traffic and disturbance associated with vegetation
removal and earthworks.
Three noxious weed species were identified during the surveys. The proposal has the potential
to cause the further spread of noxious weeds such as African Boxthorn and Tree of Heaven in
the proposal site and study area.
The implementation of safeguards detailed in section 6.6.4 would limit the potential for the
spread of weeds associated with the proposal.
Disturbance of fauna
The proposal has the potential to temporarily affect the use of the study area by fauna as a
result of increased disturbance during construction. The use of machinery may temporarily deter
some fauna species such as birds from using adjacent habitat including trees and grassland.
Pathogens
The proposal has the potential to result in the spread of pathogens such as bacteria and fungi.
This could occur through the spread of soils on vehicle tyres and operatives’ footwear. Impacts
of pathogens include spread of known diseases that are detrimental to fauna such as the
amphibian chytrid fungus.
The potential spread of pathogens would be minimised through the implementation of
safeguards outlined in section 6.6.4.
Cumulative impacts
The proposal would cause impacts additional to those that have occurred due to previous land
use activities in the study area; including agricultural activities and construction and
maintenance of roads and utilities. Other works that may contribute to cumulative ecological
impacts in the study area include loss of vegetation through maintenance of linear infrastructure
such as roads and powerlines. Given the small scale of vegetation removal involved, and the
degraded nature of the groundcover vegetation proposed to be removed, it is unlikely that the
proposal would cause significant cumulative ecological impacts.
Key threatening processes
One key threatening process listed under the TSC Act and EPBC Act is relevant to the
proposal: clearing of native vegetation. This includes eight mature Kurrajong trees and two
mature White Cypress Pine trees as described above.
Summary of impact assessment
The literature review, database search and field surveys identified a number of species and one
ecological community (Box-Gum Woodland) listed under the EPBC Act and/or TSC Act with the
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potential to occur in the study area. It is unlikely that the proposal would affect any of these
biota primarily due to the degraded nature of the habitat proposed to be removed.
6.6.4 Mitigation
Biodiversity safeguards and management measures to be implemented at the site are detailed
below.
Pre-construction
All staff will be inducted and informed of the limits of vegetation clearing and the areas of
vegetation to be retained. Areas of vegetation not to be removed will be clearly marked
prior to construction.
Pruning or lopping of limbs will be conducted in preference to tree removal wherever
possible.
Construction and demolition
Removal of native vegetation will be minimised wherever possible.
Locally native flora species will be used for any revegetation around the proposal site.
Any herbicides used for weed control will be applied to the manufacturer's specifications
and as outlined in the manufacturer’s Material Safety Data Sheet.
Broad spectrum non-selective herbicides (residual herbicides) will not be used.
Herbicides selected for use will be appropriate for the species being treated.
Spraying of herbicides will not be undertaken in windy weather or within such distance of
a watercourse as will permit any of the herbicide to enter the water.
A weed management plan will be prepared as part of the CEMP for implementation
before, during and after the works. The weed management plan will include measures to
prevent the spread of weeds, particularly African Boxthorn and Tree of Heaven.
Vehicle and machinery wash/brush downs will be conducted before vehicles leave the
proposal site to minimise the risk of spreading weed and pathogen species during
construction.
Weed infested topsoil will be disposed of or treated and will not be stockpiled adjacent to
any areas of native vegetation.
Declared noxious weeds will be managed according to the requirements of the NSW
Noxious Weeds Act 1993.
6.7 Heritage
6.7.1 Existing environment
Aboriginal heritage
An Aboriginal Due Diligence archaeological assessment has been undertaken for the study
area by OzArk and is provided as Appendix F.
A search of the OEH administered Aboriginal Heritage Information Management System
(AHIMS) database returned four records for Aboriginal heritage sites within the designated
search area. The four previously recorded sites are located within 2.5 kilometres of the study
area, with the closest located 650 metres to the north-east.
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As part of the assessment, a field inspection was conducted on 27 June 2016. Within the study
area, no Aboriginal sites were recorded and no archaeologically sensitive landforms were
identified during the field inspection. The visual inspection also assessed that there is a very low
possibility of the proposal adversely impacting Aboriginal cultural heritage values.
Non-Aboriginal heritage
The following databases/registers were searched to determine the presence of non-Aboriginal
heritage items in the vicinity of the study area:
Australian Heritage Database
State Heritage Register
Section 170 Register (undertaken via the State Heritage Inventory search tool)
Wellington Local Environmental Plan 2012.
The following items within the Wellington LGA are listed on the State Heritage Register:
Blacks camp, located at University Road, approximately 5.8 kilometres south of the study
area
John Fowler steam road locomotive, located at 9 Amaroo Drive, approximately 7.7
kilometres south of the study area
Wellington convict and mission site – Maynggu Ganai, located at Curtis Street,
approximately 7.8 kilometres south-east of the study area
Wellington post office, located at 21 Maughan Street, approximately 6.5 kilometres south-
east of the study area.
There are no items of local heritage significance listed by the LEP within, or in the immediate
vicinity of, the study area.
6.7.2 Construction and demolition impacts
Construction of the proposal would not result in any impacts to listed/known Aboriginal or non-
Aboriginal heritage items. Mitigation measures provided in section 6.7.4 would be implemented
to ensure heritage listed items within proximity to the works are not impacted during
construction.
6.7.3 Operational impacts
Operation of the proposal would not result in any impacts to listed heritage items.
6.7.4 Mitigation
Construction and demolition
All land-disturbing activities must be confined to within the assessed site area. Should the
parameters of the proposed work extend beyond the assessed area, then further
archaeological assessment may be required.
Work crews involved in the proposed work should be made aware of the legislative
protection requirements for all Aboriginal sites and objects.
In the unlikely event that objects are encountered that are suspected to be of Aboriginal
origin (including skeletal material), it is recommended that activities should temporarily
cease within the immediate vicinity of the find locality and be relocated to other areas of
the subject site (allowing for a curtilage of at least 50 metres). OEH must then be
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contacted to advise on the appropriate course of action to record and collect the identified
item(s).
Work crews should undergo cultural heritage induction to ensure they recognise
Aboriginal artefacts and are aware of the legislative protection of Aboriginal objects under
the National Parks and Wildlife Act 1974 and the contents of the Unanticipated Finds
Protocol.
Operational
No mitigation measures would be required.
6.8 Site contamination
6.8.1 Existing environment
The NSW Environment Protection Authority’s (EPA) Contaminated Lands Register was
searched on 11 July 2016. No listed contaminated sites were identified within the vicinity of the
site. The existing contamination status of the site is not known, however given the previous
agricultural and grazing uses on site, contamination is very unlikely.
The site and the surrounding area are not considered a salinity hazard.
6.8.2 Construction and demolition impacts
The approach to managing any contaminated finds would be specified in the construction
environmental management plan (CEMP).
Appropriate mitigation measures, including preliminary soil testing and waste classification,
would be implemented to manage the potential for any contamination impacts during
construction.
The proposal would also have the potential to result in soil and water contamination via any
uncontrolled fuel or chemical spills from plant and equipment.
Potential impacts would be minimised by implementing the mitigation measures provided in
section 6.8.4.
6.8.3 Operational impacts
Operation of the proposal would not impact contamination at the site. Aside from the building
areas, the site would be covered in gravel or landscaped where required. No site contamination
impacts are anticipated during operation.
6.8.4 Mitigation
Construction
Check machinery daily for oil, fuel or other liquid leaks.
Develop contingency plans to deal with spills which might occur during the course of
construction.
Undertake progressive soil testing of the proposal area during excavation works. Tests
would confirm the presence and type of any contaminants, and classify the soil for the
purpose of spoil management and removal.
An ‘unexpected finds protocol’ would be prepared and included in the CEMP to assist
with the identification, assessment, management, health and safety implications,
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remediation and/or disposal (at an appropriately licenced facility) of any potentially
contaminated soil and/or water.
In the event that indicators of contamination are encountered during construction (such
as odours or visually contaminated materials), work in the area would cease until an
occupational hygienist can advise on the need for remediation or other action.
If dewatering is required during construction, the water would be tested (and treated if
necessary) prior to re-use, discharge or disposal.
Operational
No additional mitigation measures would be required.
6.9 Waste management
6.9.1 Existing environment
Wastes generated on site include domestic wastes including food scraps, aluminium cans, glass
bottles, plastic etc. These would be disposed of in allocated bins and removed from site weekly.
6.9.2 Construction and demolition impacts
Construction of the proposal has the potential to generate the following wastes:
Surplus materials used during site establishment such as safety fencing and barriers
which may include plastics and metal. This is expected to be minimal as it is likely that
prefabricated structures would be used.
General construction waste such as excess concrete, timber, paper, plastic and metal.
Domestic waste including food scraps, aluminium cans, glass bottles, plastic and paper
containers, and putrescible waste generated by site construction personnel.
Surplus spoil from excavation activities (i.e. material not required for backfilling).
Demolition of the proposal is likely to generate the following wastes:
Structural steel from removal of walls and roof sheeting
Concrete from removal of the building slabs and walkways
Electrical cabling from removal of wiring
Industrial waste such as lubricating oils, hydraulic fluids and cleaning agents
Associated infrastructure from generators and main switchboard.
6.9.3 Operational impacts
There would be an increase in operational waste associated with the proposal. Waste
management procedures for the proposal would be as per the operations of the existing facility,
which would include separation of waste for recycling and general disposal.
6.9.4 Mitigation
Construction and demolition
The following mitigation measures would be implemented to ensure the appropriate
management of waste during construction and operation:
Maintain the site in a clean and tidy condition at all times.
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Ensure waste is placed in skip bins positioned in defined area(s) onsite or within the site
compound (if required).
Avoid surplus construction materials through appropriate planning of the construction
works.
Recycle waste in accordance with the NSW Government’s Waste Reduction and
Purchasing Policy.
All waste materials produced by the proposal would be assessed, classified, managed
and disposed of in accordance with the Waste Classification Guidelines (DECCW 2009)
and the waste management hierarchy.
Classify and dispose of waste (if unable to be reused or recycled) in accordance with the
EPA Waste Classification Guidelines (EPA 2014).
Any waste material identified as being contaminated would be managed in accordance
with the Contaminated Land Management Act 1997 and other relevant legislation.
Limit smoking to defined areas and provide butt bins for construction workers.
Operational
No mitigation measures would be required.
6.10 Bushfire hazard
6.10.1 Existing environment
The north-western corner of the site includes areas mapped as bushfire prone land in
categories 1, 2 and 3 under the Wellington LEP 2012. Refer to Figure 6-9. This means that the
site is at risk of being affected by bushfire.
Figure 6-9 Bushfire hazard
Source: NSW Planning and Environment
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6.10.2 Construction and demolition impacts
During construction, it is possible that hot work (such as welding) could ignite a bushfire. In the
instance of bushfire in the vicinity during construction, there is the possibility of damage to
equipment/machinery. In the event of a bushfire, work would cease and workers would be
evacuated in accordance with standard emergency response procedures.
The proposal would not be located within the portion of the site mapped as bushfire prone. An
existing cleared area would be used for construction.
6.10.3 Operational impacts
Where relevant, the design of above ground items would take into account the bushfire
protection measures included in the RFS guideline Planning for Bushfire Protection 2006. The
likelihood of assets being affected by fire would be assessed during detailed design.
General site maintenance would be undertaken as per existing maintenance procedures and
would minimise bushfire risk.
6.10.4 Mitigation
Construction and demolition
Avoid undertaking hot work (such as welding) outside during dry weather or periods of
prolonged bushfire risk.
In the event of a bushfire, work is to cease and workers evacuated in accordance with
standard emergency response procedures.
Design of above ground items must be in accordance with the bushfire protection
measures included in the RFS guideline Planning for Bushfire Protection 2006.
Shrubs are not to be planted close to any buildings.
Fences, sheds and structures should be constructed of non-flammable material and be
clear of trees and shrubs.
Operational
General site maintenance to be undertaken as per existing maintenance procedures in
order to minimise bushfire risk.
All grasses are to be maintained to a height of a maximum 50mm.
The crowns of trees should be separated where practical such that there is a clear
separation distance between adjoining tree crowns.
Prune lower branches of trees to stop a surface fire spreading to the canopy of the trees.
Trees or shrubs are to be regularly cleared of any dead material.
Gas cylinders to be stored in an area that is clear of all flammable material and securely
tethered with non-flammable fastenings to prevent toppling over.
Driveways and access ways must allow for the safe passage for emergency vehicles to
all buildings and assets on the land.
Roof gutters should be free of leaves and other combustible material.
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6.11 Visual
6.11.1 Existing environment
The nearest potentially sensitive receptors to the proposal site include:
State Government Soil Conservation Service located at 6582 Goolma Road,
approximately 340 metres from the western boundary of the site (and approximately 470
metres from the area that would be subject to the proposal)
Residential housing located within Cadonia Estate, located at 6-28 Cadia Place,
Wuuluman, approximately 125 metres from the south-eastern boundary of the site (and
approximately 340 metres from the area that would be subject to the proposal).
The majority of activities occurring on site are contained within the existing buildings that are
located at the northern end of the site (refer to Figure 1-1). Therefore, most site activities are not
visible from the residences located to the western and south-eastern boundaries of the site, nor
are they visible from nearby roads (e.g. Goolma Road).
6.11.2 Construction and demolition impacts
Construction and demolition activities would be visible from residences located south of the site
boundary and from vehicles travelling along adjacent roads. Temporary visual impacts may
occur as a result of ground disturbance, the presence of equipment and materials within the
work area and the presence of construction vehicles and personnel.
Overall, the potential visual impacts of construction and demolition activities are considered to
be minimal as the works would be temporary and short term.
6.11.3 Operational impacts
The proposed new buildings and car parking areas would be visible from the residences located
to the western and south-eastern boundaries of the site and from nearby roads (e.g. Goolma
Road). The majority of activities that would occur on site would be contained within the
proposed buildings (refer to the preliminary site plan provided in Appendix B).
The proposal would be located entirely within lot boundaries of the existing correctional centre,
therefore it is consistent with the existing uses on site.
The proposed buildings on site would be single storey, which would be considered appropriate
in the context of the existing facility and surrounding landscape.
Minor landscaping would be provided along the western boundary of the site, along Goolma
Road in order to provide a buffer between the proposal and the adjoining visual receptors.
6.11.4 Mitigation
Construction
The following mitigation measures would be included in the CEMP and implemented during
construction to minimise potential impacts on land use and visual amenity:
Maintain construction sites in a clean and tidy condition at all times.
Ensure all work equipment and materials are contained within the designated boundaries
of the work site.
Limit construction vehicles and personnel on site to those needed for that activity, with all
excess equipment moved off-site to reduce visual impacts.
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Operational
The detailed design of the proposal would take into account relevant urban design and
visual considerations.
Maintain the site in a clean and tidy condition at all times.
Ensure landscaped areas are regularly maintained.
6.12 Socio-economic
6.12.1 Existing environment
This assessment of the socio-economic risks has been undertaken based on a desktop review
of:
Socio-economic profile of Wellington from Australian Bureau of Statistics’ (ABS) Census
data
Western Plains Regional Council Policies and Strategies
Crime Statistics from the Bureau of Crime Statistics and Research (BOCSAR)
NSW Inmate Census 2014 from Corrective Services NSW (CSNSW).
In assessing the context of the existing environment, it is important to acknowledge that
although the proposal is located within close proximity to the town of Wellington, NSW, the
proposal will provide for the broader NSW community. The proposal is being undertaken to
address an urgent need for additional custodial accommodation across New South Wales. The
proposal therefore has a broader regional context that needs to be taken into consideration
when assessing its social impact.
The existing environment has been assessed in regard to the existing facility in terms of
inmates, staff, visitors and community involvement. It has also considered the broader
Wellington community.
Wellington Correctional Centre
Profile of existing and potential future inmates
The existing facility was opened in September 2007 and has a maximum operational capacity of
703 inmates. The facility can accommodate 619 male inmates in maximum, medium and
minimum security and 84 female inmates in minimum security. CSNSW will house inmates as
close to family as possible. Although some inmates will be from the local region, it is anticipated
that some will be from across NSW due to their security classification and availability of
accommodation.
There is limited information about the demographic characteristics of inmates at the existing
facility. Information about inmates has been obtained from the 2014 NSW Inmate Census
conducted by CSNSW. This data collected from corrective centres across NSW has found that:
The largest proportion of inmates were aged between 25 to 34 years (34%). This was
followed by inmates aged 35 to 44 years (27%), 45 years and over (21%) and 18 to 24
years (18%).
24% of inmates identified as Aboriginal and Torres Strait Islander (ATSI). 33% of the total
female inmate population identified as ATSI and 23% of the total male inmate population
identified as ATSI.
75% of inmates were born in Australia, 17% were born in non-English speaking countries
and 6% were born in other English speaking countries.
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58% of the total NSW inmate population had never married, followed by those who were
married or in a de-facto relationship (29%).
The proposed temporary facility will house an additional 400 inmates. It is anticipated that they
will have similar characteristics to those identified in the above inmate census data.
Information on facility staff and current economic opportunities
The existing facility is the largest employer in Wellington with 224 staff employed by CSNSW.
Staff comprise of 134 custodial staff, 34 industries staff, 37 programs staff and 19 administration
staff. In addition, CSNSW has a community corrections office in the Wellington area. It also
engages other services such as Justice Health and Forensic Mental Health Network which
provide a number of personnel to the centre. It is anticipated that as a result of the proposal a
further 220 staff would be required.
The Wellington community’s economy is closely linked to the centre’s expenditure, particularly
in terms of staff salaries. Information provided by DJ indicates that the wages for staff annual
salaries is approximately $12 million. This in turn has benefits for the local community in
regards to accommodation, meals and other services and facilities used by staff that live locally.
In addition, the existing facility currently utilises local trade services for repairs and
maintenances as well as businesses that can offer services for the inmates for example
hairdresser for inmates and taxi services for visitors.
Visitors to the Wellington Correctional Centre
Opportunities for family and friends to visit the inmates are available on Saturdays, Sundays
and public holidays. During the 2015-2016 financial year, the centre had 6,930 family and friend
visits, which is around 60 visitors per visiting day. The facility is located approximately seven
kilometres north-east of Wellington town centre. There is no public transport, so access to the
existing facility for staff visitors is by private vehicle or local taxi.
There is limited data available on the profile of visitors to the existing facility. In 2012, CSNSW
conducted a survey of visitors to NSW correctional centre. The survey results identified that of
the respondents:
74% of were female
The average age was 43 years
The majority were born in Australia (77%), while 4% were born in the United Kingdom,
3% in Europe and 10% did not specify
The largest proportion of respondents were visiting a child (23%), followed by visiting their
husband/de facto (19%), sibling or friend (both 12%) and a parent (9%)
The most common reasons for visiting included maintaining relationship (76% always or
often visited for this reason), keeping the family together (54% always or often visited for
this reason) and companionship (46% always or often visited for this reason).
Visiting sessions for the proposed expansion will be consistent with the current centre
arrangements comprising of two sessions per week on weekends and public holidays only. This
is expected to be 90 visitors per session.
Community involvement
The existing facility has a community projects program which operates five days per week within
Wellington and surrounding areas. The community projects team work in partnership with
Council to maintain community assets. This work has been received positively by the
community. Other community projects include Police Community Youth Clubs (PCYC), various
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churches and charitable organisations, Scout Centre, Wellington Caves Reserve and river
camping area.
The community projects team donated 4,543 hours of inmate labour valued at $78,759 to the
community in the 2015/16 financial year. In addition, the Centre has fundraised for local
charities and donated to the community organisation, Gungie Origin.
Along with NSW Police, the existing facility is an official partner of the Gungie Origin. The
organisation partners with local police to reduce crime in the community through a grass roots
approach. The organisation formulated the “Dob in a Dealer” program which was rolled out
nation-wide. The Gungie Origin also provides numerous programs targeting Aboriginal and non-
Aboriginal youth. The existing facility is currently working with Gungie Origin to employ a full
time Aboriginal Youth social worker to assist troubled youth in the town.
The existing facility is also a strong supporter of the PCYC and is involved in an ongoing
maintenance program and fundraising campaigns.
The surrounding community
Local context
The Wellington Correctional Centre is located seven kilometres outside of the Wellington town
centre within the Western Plains Regional Council LGA. The existing facility is located within
the former Wellington Council LGA and therefore strategies and policies developed by
Wellington Council are applicable.
The Wellington town centre is the major suburban centre of the LGA. It is located 362
kilometres from Sydney on the Great Western Highway. The area is predominantly agricultural
with a growing tourism industry. The existing facility was opened in 2007 with the anticipation
that this would stimulate the local economy.
Community profile
The following provides a summary of the demographics of the Wellington urban centre from the
2011 ABS Census data. This area has been selected because it is the closest population
centre to the existing facility. The existing facility is not included within the boundary and
demographic data for the inmates has been provided earlier in section 6.12. A comparison for
the town centre has been made against data for the Wellington LGA and Greater NSW
(excluding the Sydney Metropolitan Area), as defined by the ABS Census. In 2011:
4,540 people lived in the Wellington urban centre, which was just over half of the total
population of Wellington LGA (8,493 people).
The median age in Wellington town was 42 years, one year older than the LGA (41)
which was the same for greater NSW.
A significant proportion of Aboriginal and Torres Strait Islander (ATIS) people were living
in both Wellington (25%) and the LGA (20%) compared to greater NSW (4.7%). The
Wiradjuri People are the traditional custodians of the land.
Unemployment in the Wellington urban centre was 12% this is significantly higher than
the LGA at 8.3%, which is also higher than greater NSW at 6.1%
For families without children the weekly income in Wellington urban centre was $1,559
this was slightly higher than the LGA of $1,429 however both are lower than greater NSW
at $1,788.
There was a higher proportion of one parent families (27%) than the LGA (21%) both are
higher than greater NSW at 17%.
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Local Government Strategies
A review of the former Wellington Council policies has been undertaken. Although now
amalgamated to form the Western Plains Regional Council, the policies provide some context
regarding the vision for the area surrounding the Wellington Correctional Centre. It must be
acknowledged that GHD has not undertaken any formal consultation with Council. It is
recommended that this be undertaken as part of the development of the mitigation plan for the
potential socio -economic risks that have been identified.
Wellington 2025 Community Strategic Plan (2012)
This plan provides the vision, aspirations and priorities of the Wellington community (Wellington
Council, 2012). Wellington LGA has an abundance of rural land, which is used primarily for
agriculture, including sheep and cattle grazing, with some viticulture and tourism. Agriculture
and related activities are major industries, with cropping, wool, beef and prime lamb contributing
more than $43 million to the economy. There is also a growing tourism industry driven by the
local natural features, wineries and boutique galleries, which annually attract thousands of
visitors. It is considered a gateway to surrounding major regional centres. Wellington Town
Centre is the major suburban centre of the LGA.
The plan identifies that there are sometimes negative perceptions about Wellington town.
Community engagement as part of the plan identified that existing crime is a key concern for the
community. In addition the Wellington Correctional Centre may be contributing to a negative
community perception about Wellington. One of the strategic outcomes of the plan is to reduce
levels of crime and increase community safety through State and local initiatives as well as
collaboration with NSW Police and PCYC.
The plan highlights that Wellington needs to build its identity and reputation as a place to live,
work, invest, play and stay. It identifies agriculture and tourism as key industries that can help
improve its reputation. This could be achieved through creating more employment and training
opportunities especially for young people, improving internet and mobile connectivity, and
building on the heritage significance of buildings within the area. Improving these areas would
increase visitors and longer stays in the area.
The plan identifies that a range of accommodation options is needed in the LGA, including crisis
accommodation. This could be facilitated through collaboration with government agencies and
organisations, including Aging, Disability and Home Care (part of the Department of Family and
Community Services), Aboriginal organisations and Aboriginal housing cooperatives.
Wellington Council Crime Prevention Plan (2011)
This plan outlines the Wellington crime profile, community concerns and actions to reduce crime
(Wellington Council, 2011). Based on Figure 6-10, Wellington has very high rates of crime within
NSW, particularly malicious property damage, breaking and entering a dwelling, stealing from a
dwelling, assault and sexual offences (all within the top ten NSW LGAs). In particular, the
number of offences related to malicious property damage and breaking and entering a dwelling
have increased by 21% and 43% respectively within 36 months to March 2011.
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Figure 6-10 Recorded incidents of selected offences, 2010
Source: Wellington Council, 2011
The plan states that socio-economic situation may be a contributing factor to crime levels in the
area, including high rates of unemployment, high numbers of people on social benefits and high
indigenous populations particularly Aboriginal youth (the median age of the Aboriginal
population was 16 years compared to 42 years for the non-Aboriginal population). The plan
identifies that malicious property damage are problems primarily caused by youth due to lack of
programs and activities available to them.
The plan aims to reduce crime rates through collaboration with NSW Police, local community
and health services, Technical and Further Education (TAFE) outreach and PCYC to provide
information and programs particularly for youth.
6.12.2 Construction and demolition impacts
Construction of the proposal is anticipated to take approximately seven months to complete. It
is therefore anticipated that majority of socio-economic risks are temporary. The majority of
which can be mitigated. Table 6-23 outlines the key risks associated with construction of the
proposal. In addition, given the temporary nature of the facility, it is anticipated that the
structures will be removed in 5-7 years once the facility is no longer required. Although the
timeframe for demolition has not been determined, the risks associated with this process have
been considered.
Table 6-23 Potential socio economic risks associated with construction
and demolition
Risk Detail
Amenity Increased construction traffic along Goolma Road and Mitchell Highway
may temporarily reduce the amenity particularly in the town centre. The
community may experience increased noise and air quality impacts as a
result of increased construction and demolition activities and associated
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Risk Detail
traffic.
Construction and demolition activities may generate short term amenity
impacts on surrounding residential properties along Cadia Place. Noise
assessment reports indicate that there may be some properties that
experience higher noise levels than regulation standards during normal and
out of standard work hours.
Economic The proposal would generate jobs during construction, which could be
accessed by local residents. Depending on the split of local workers and
non-resident workers, the construction workforce could potentially increase
demand for housing and services (e.g. health). The construction workforce
would result in local economic benefits, including increased expenditure
particularly for food and accommodation services.
One of the risks associated with demolition is that jobs created during the
operation of the proposed facility will no longer exist. Consequently, any
workers that have moved to Wellington for the employment opportunities
generated by the Correctional Centre will have to find new employment.
Access As per the traffic impact assessment completed for the proposal (refer to
section 6.3) up to 300 light vehicles and 50 heavy vehicles per day would
be required for construction, 7 days a week. Construction vehicles are
expected to travel between Wellington town centre and the construction site
along Goolma Road and Mitchell Highway. Increased construction traffic
particularly through the town centre may potentially reduce the access of
road users, including motorists and bus passengers. Road users may
experience increased inconvenience, travel times, disruptions and potential
perception of traffic related safety risks.
6.12.3 Operational impacts
Table 6-24 identifies the potential socio-economic risks associated with the proposal for inmates
at the existing facility. The risks have been identified through a desktop review of data,
community information and similar case studies. It is recommended to incorporate stakeholder
inputs to confirm the potential socio-economic impacts for the proposed temporary facilities.
Given the temporary nature of the facility and its anticipated life span of 5-7 years all risks and
benefits associated with the proposal are also temporary. This means that employment
generated by the proposal will no longer exist once the facility has been demolished, this will
have a significant impact on workers who move to the area.
Table 6-24 Potential socio economic risks associated with operational of
the proposal
Benefit/risk Detail
Potential positive benefits
Facility that services
broader NSW
The proposal is being undertaken to address an urgent need for
additional custodial accommodation across NSW. The facility will
assist in meeting the demand that is being experienced across
NSW.
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Benefit/risk Detail
Economic impacts There are number of economic benefits associated with the
proposal. A more detailed economic assessment would provide
estimates of these benefits. In summary, potential economic
impacts would include:
Additional 220 jobs employed by CSNSW
Increased local procurements of goods and services
required to operate the facility
Inmate expenditure of local goods and services
Staff expenditure of local goods and services
Visitors expenditure including accommodation,
meals and local transport
In addition to the direct economic impact of the
temporary expansion, the proposal will create flow-
on or multiplier effects
Additional accommodation to support new workers
could result in an increase in local house prices due
to pressure on the housing market.
Demographic changes There is a potential that increased employment opportunities as a
result of the proposal would attract some employees to move into
the town of Wellington with their families for medium (five to six
years) to long term. Such in-migration of workers and their
families would promote growth in town.
Community benefit The existing facility has an active community projects program
with inmates working in partnership with Council to maintain local
community assets. The proposal would accommodate an
additional 400 inmates and may increase the capacity of the
community projects program to expand its projects leading to
increased demand for workers and innovation in the planning and
delivery of these programs. This would be a positive benefit to the
community.
Accommodation The potential increase in the local population would increase
demand for housing and accommodation facilities in town.
Currently in Wellington there are 150+ properties for sale and
remaining on market for over 300 days and 50 properties for rent.
It is therefore anticipated that the additional population as a result
of the proposal will benefit accommodation in the area increasing
property values and rental opportunities.
Potential risks
Stigma and impact to
town’s reputation
There is the potential that the community will be concerned that
the proposal will have an adverse impact on the character and
reputation of the Wellington town centre. Consultation as part of
the community strategic plan identified that there are sometimes
negative perceptions about Wellington town. There is the
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Benefit/risk Detail
potential that this stigma could impact on investment in the town
particularly in regards to tourism and related new business
opportunities.
Fear about impact on local
crime
Crime within the community is already a concern as outlined
within the Council strategies. There is the potential that the
community may perceive that the proposal may result in an
increase in local crime due to prison escapees, visitors of inmates
or inmates choosing to stay within the local community after their
prison term. Although there is no evidence to suggest that this
may be the case, it would need to be investigated further.
Traffic and access The proposal is expected to generate 634 vehicle movements per
day (refer to section 6.3.3) The majority of trips are expected to
be taken by CSNSW staff and visitors of inmates. Traffic impacts
are expected to minor.
Impact on community and
social infrastructure
The proposal has the potential to increase local population
through the additional workforce required to support the proposal,
visitors to the facility as well as in-mates that choose to move into
the local area. The additional population is likely to increase
demand on existing community and social infrastructure facilities
and service including education, health and social services,
particularly those that support released inmates, if they are
already operating at capacity.
6.13 Mitigation
Mitigation measures should focus on enhancing both the positive economic and social impacts
of the proposal whilst mitigating or minimising the potential risks. Throughout the process,
engagement with the community and stakeholders will be crucial and it is recommended that
this commence immediately ahead of construction.
Construction and demolition
Consultation with the community to understand concerns regarding the proposal.
Communications materials should then be developed addressing their key concerns.
Consultation with affected adjoining landholders should be respectful and ongoing to
ensure impacts are minimised.
A construction environmental management plan should address impacts to adjoining
landholders and complied with during construction. A similar plan will need to be
developed for demolition.
Construction and demolition workforce should be sourced locally with appropriate training
opportunities provided for residents within the region.
Consultation with local government and businesses and service providers should be
undertaken to ensure that the required workforce can be accommodated within
Wellington. If this will cause excessive pressure alternative locations should be
considered for workforce accommodation.
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Preparation of an employment management plan should be prepared prior to demolition
of the proposed temporary facility. The plan should consider opportunities to retain
workers on site, relocation of workers to other CSNSW sites or retraining programs so
that workers can stay within the local area.
Operational
Ongoing consultation with the community, surrounding landowners and key stakeholders to
identify and manage concerns with regards to the proposal.
Work with Council, tourism authorities and the local business community to maintain a
positive image about the proposal to maintain a positive image about the town and
encourage investment.
Collaboration with NSW Police, PCYC, Gungie Origin and other community and health
service providers should be undertaken to ensure that crime rates in the area are
monitored and managed.
The existing facility should seek opportunities to expand current levels of involvement in
the local community as a result of the proposal.
Consultation with health, emergency, education service providers and Local Government
should be undertaken to ensure there is existing capacity for future inmates’ families and
additional staff to the area can be accommodated.
Future workforce for the centre should be sourced locally where possible. Consider
training and upskilling of local population for suitable employment opportunities at the
expanded correctional facility. Training and upskilling should continue throughout the life
of the proposed facility so that employees have transferrable skills for when the
temporary facility closes.
Consultation with local governments and real estates should be undertaken to assess
housing market for staff moving to the area. Should there be insufficient housing stock it
is suggested that staff are accommodated at alternate locations.
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7. Environmental management
This section provides an outline of the environmental management requirements for the
proposal, and a consolidated list of mitigation measures that form the environmental
management framework.
7.1 Environmental management plans
Under the State Government’s policy to improve the performance of the NSW construction
industry, preparation of a construction environmental management plan (CEMP) is mandatory
for all projects undertaken by or on behalf of government agencies or where funding is being
provided by the government. The Construction Policy Steering Committee and the then
Department of Infrastructure Planning and Natural Resources have produced environmental
management system and environmental management plan guidelines aiming to assist
contractors both in complying with the Government’s policy and in demonstrating that
compliance. The environmental management objectives and supporting actions presented in
this section are intended to assist in this process.
The CEMP would also consider the demolition of the proposal and would include a risk
assessment which ensures that the safeguards identified in this REF, as well as any others that
are considered relevant, are effectively translated into actual construction techniques and
environmental management activities, controls and monitoring/verification to prevent or
minimise environmental impacts. The CEMP should also identify the requirements for
compliance with relevant legislation and other regulatory any requirements to ensure
environmental safeguards described throughout this REF are implemented. The environmental
management objectives and supporting actions presented in this section are intended to assist
in this process. DJ would review the CEMP.
The CEMP should generally conform to the structure shown in Table 7-1.
Table 7-1 CEMP structure
Section Details
Background Introduction to the document
Description of the proposal and project details
The context for the CEMP in regards to the overall project
The CEMP objectives
The contractor’s environmental policy
Environmental management Environmental management structure of the organisation and specific team responsibilities with respect to the CEMP and its implementation
Approval and licensing requirements relevant to the project
Reporting requirements
Environmental training
Emergency contacts and response
Implementation A project specific risk assessment
A detailed list of environmental management
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Section Details
safeguards and controls
CEMP sub plans for specific environmental controls
A detailed schedule assigning responsibility to each environmental management activity and control
Monitor and review Environmental monitoring
Environmental auditing
Corrective action
CEMP review and document control procedures
7.2 Environmental management measures
Implementation of the mitigation measures outlined in section 6 would be undertaken during a
number of phases of the project. These phases comprise:
Detailed design – refinement of the design details
Pre-construction – prior to the contractor arriving on site to carry out the works
Construction – during construction phase
Operation – post construction.
Demolition – post operation.
7.2.1 Land use
Objective(s)
Minimise impacts to surrounding land uses during construction and operation of the proposal.
Action(s)
Action/phase Responsibility
Construction and demolition
The neighbouring landowners are to be consulted with regard to the construction works, predicted program and any access requirements as required.
Contractor
Best management construction and demolition impacts are to be documented in a project specific CEMP.
Contractor
Land disturbance during construction is to be strictly limited to that required to undertake the construction and demolition works.
Contractor
Construction and demolition works would be undertaken in consideration of adjacent vegetation.
Contractor
Areas disturbed during construction would be returned to the pre-construction condition.
Contractor
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7.2.2 Noise
Objective(s)
Compliance with relevant recommendations specified in the Interim Construction Noise
Guideline (DECC, 2009).
Avoidance/minimisation of noise impacts on nearby sensitive noise receivers.
Action(s)
Action/phase Responsibility
Construction and demolition
Regularly train workers and contractors (such as at the site induction and toolbox talks) on the importance of minimising noise emissions and how to use equipment in ways to minimise noise.
Contractor
Avoid any unnecessary noise when carrying out manual operations and when operating plant.
Contractor
Ensure spoil is placed and not dropped into awaiting trucks. Contractor
Avoid / limit simultaneous operation of noisy plant and equipment within discernible range of a sensitive receiver where practicable.
Contractor
Switch off any equipment not in use for extended periods e.g. heavy vehicles engines will be switched off whilst being unloaded.
Contractor
Avoid deliveries at night/evenings wherever practicable. Contractor
No idling of delivery trucks. Contractor
Keep truck drivers informed of designated vehicle routes, parking locations and acceptable delivery hours for the site.
Contractor
Minimise talking loudly; no swearing or unnecessary shouting, or loud stereos/radios onsite; no dropping of materials from height where practicable, no throwing of metal items and slamming of doors.
Contractor
Maximise the offset distance between noisy plant and adjacent sensitive receivers and determining safe working distances.
Contractor
Use the most suitable equipment necessary for the construction works at any one time.
Contractor
Direct noise-emitting plant away from sensitive receivers. Contractor
Regularly inspect and maintain plant to avoid increased noise levels from rattling hatches, loose fittings etc.
Contractor
Use quieter construction methods where feasible and reasonable. Contractor
The community should be notified prior to any out of hours works commencing.
Contractor
The use of noisy equipment should be minimised during the night time period.
Contractor
Activities involving large earth moving equipment should not be conducted outside of standard working hours. It may be possible to conduct construction activities that have lower noise emission, or conduct internal fit out works.
Contractor
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7.2.3 Traffic and access
Objective(s)
Ensure that construction vehicles do not cause excessive inconvenience to road and
pedestrian users.
Ensure the safety of road users, construction personnel, other workers and visitors to the
site for the duration of the proposal.
Minimise the pollution impacts resulting from the use of vehicles during construction.
Action(s)
Action/phase Responsibility
Construction and demolition
A Construction Traffic Management Plan (CTMP) to be prepared by the Contractor in consultation with NSW Department of Justice, and provided to Council and RMS as required. The TMP would be the primary management tool to manage potential traffic impacts associated with construction and demolition of the proposed works.
Contractor
Consultation with the appropriate road authority to be undertaken for the proposed operational changes to Goolma Road where a new intersection and road access is required.
Contractor
7.2.4 Air quality
Objective(s)
Avoidance/minimisation of off-site dust nuisance to neighbouring residences, workers,
inmates visitors and the community.
Minimisation of air quality impacts resulting from machinery and vehicle emissions.
Action(s)
Action/phase Responsibility
Construction and demolition
All plant and machinery would be fitted with emission control devices complying with the Australian Design Standards.
Contractor
Machinery would be turned off when not in use and not left to idle for prolonged periods.
Contractor
Dust generation would be monitored visually, and where required, dust control measures such as water spraying would be implemented to control the generation of dust.
Contractor
Any waste (such as excavated spoil) produced on-site would be stored appropriately to reduce the production of dust.
Contractor
Materials transported to and from the site would be covered to reduce dust generation in transit.
Contractor
Access points would be inspected to determine whether sediment is being transferred to the surrounding road network. If required, sediment would be promptly removed from roads to minimise dust generation.
Contractor
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Stabilisation of any excavated areas would occur as soon as practicable. Contractor
Fixed hoses would be used to dampen exposed surfaces to minimise dust generation, where required.
Contractor
7.2.5 Soils, erosion and water quality
Objective(s)
To effectively manage sediment and erosion control during the construction stage of the
proposal.
Prevention/minimisation of impacts to adjacent water bodies during the construction and
operation of the proposal.
Action(s)
Action/phase Responsibility
Construction and demolition
Sediment and erosion control devices would be installed around work sites and maintained to minimise the transport of sediment in accordance with Managing Urban Stormwater, Soils & Construction, Volume 1(Landcom 2004). These devices would be inspected weekly and immediately after rainfall to ensure their effectiveness over the duration of the works. Any damage to erosion and sediment controls would be rectified immediately.
Contractor
The area of exposed surfaces would be minimised and disturbed areas would be stabilised progressively to ensure that no areas remain unstable for any extended length of time.
Contractor
Wherever possible, reuse soil and sediment that accumulates in erosion and sediment control structures during site restoration unless it is contaminated or otherwise inappropriate for reuse.
Contractor
Cease work in the immediate vicinity of any areas of suspected contamination that are identified prior to or during work. Ensure that these areas are not disturbed and are cordoned off as a safety risk.
Contractor
Vehicle and machinery movement would be confined to designated roads, tracks, pathways and work areas. Designated lay-down areas would be selected to minimise erosion or vegetation damage.
Contractor
Manage stockpiles by implementing sediment and erosion control devices in accordance with Managing Urban Stormwater, Soils & Construction, Volume 1 (Landcom 2004)
Contractor
Cease work during heavy rainfall events when there is a risk of sediment loss off-site or ground disturbance due to water logged conditions.
Contractor
Ensure equipment, plant and materials are placed in designated areas where they are least likely to cause erosion.
Contractor
Following completion of work, restore land surfaces to as close as possible to pre-existing conditions.
Contractor
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7.2.6 Flora and fauna
Objective(s)
Avoidance/minimisation of impacts to flora and fauna.
Minimise clearing of onsite vegetation.
Avoid weed invasion.
Action(s)
Action/phase Responsibility
Pre-construction
All staff will be inducted and informed of the limits of vegetation clearing and the areas of vegetation to be retained. Areas of vegetation not to be removed will be clearly marked prior to construction.
Contractor
Pruning or lopping of limbs will be conducted in preference to tree removal wherever possible.
Contractor
Construction and demolition
Removal of native vegetation will be minimised wherever possible. Contractor
Locally native flora species will be used for any revegetation around the proposal site.
Contractor
Any herbicides used for weed control will be applied to the manufacturer's specifications and as outlined in the manufacturer’s Material Safety Data Sheet.
Contractor
Broad spectrum non-selective herbicides (residual herbicides) will not be used. Herbicides selected for use will be appropriate for the species being treated.
Contractor
Spraying of herbicides will not be undertaken in windy weather or within such distance of a watercourse as will permit any of the herbicide to enter the water.
Contractor
A weed management plan will be prepared as part of the CEMP for implementation before, during and after the works. The weed management plan will include measures to prevent the spread of weeds, particularly African Boxthorn and Tree of Heaven.
Contractor
Vehicle and machinery wash/brush downs will be conducted before vehicles leave the proposal site to minimise the risk of spreading weed and pathogen species during construction.
Contractor
Weed infested topsoil will be disposed of or treated and will not be stockpiled adjacent to any areas of native vegetation.
Contractor
Declared noxious weeds will be managed according to the requirements of the NSW Noxious Weeds Act 1993.
Contractor
7.2.7 Heritage
Objective(s)
Minimise potential impacts to items and places of Aboriginal and non-Aboriginal heritage due to
the proposal.
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Action(s)
Action/phase Responsibility
Construction and demolition
All land-disturbing activities must be confined to within the assessed site area. Should the parameters of the proposed work extend beyond the assessed area, then further archaeological assessment may be required.
Contractor
Work crews involved in the proposed work should be made aware of the legislative protection requirements for all Aboriginal sites and objects.
Contractor
In the unlikely event that objects are encountered that are suspected to be of Aboriginal origin (including skeletal material), it is recommended that activities should temporarily cease within the immediate vicinity of the find locality and be relocated to other areas of the subject site (allowing for a curtilage of at least 50 metres). OEH must then be contacted to advise on the appropriate course of action to record and collect the identified item(s).
Contractor
Work crews should undergo cultural heritage induction to ensure they recognise Aboriginal artefacts and are aware of the legislative protection of Aboriginal objects under the National Parks and Wildlife Act 1974 and the contents of the Unanticipated Finds Protocol.
Contractor
7.2.8 Site contamination
Objective(s)
Minimise the risk associated with potential site contamination during construction and operation
of the proposal.
Action(s)
Action/phase Responsibility
Construction and demolition
Check machinery daily for oil, fuel or other liquid leaks. Contractor
Develop contingency plans to deal with spills which might occur during the course of construction.
Contractor
Undertake progressive soil testing of the proposal area during excavation works. Tests would confirm the presence and type of any contaminants, and classify the soil for the purpose of spoil management and removal.
Contractor
An ‘unexpected finds protocol’ would be prepared and included in the CEMP to assist with the identification, assessment, management, health and safety implications, remediation and/or disposal (at an appropriately licenced facility) of any potentially contaminated soil and/or water.
Contractor
In the event that indicators of contamination are encountered during construction (such as odours or visually contaminated materials), work in the area would cease until an occupational hygienist can advise on the need for remediation or other action.
Contractor
If dewatering is required during construction, the water would be tested (and treated if necessary) prior to re-use, discharge or disposal.
Contractor
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7.2.9 Waste management
Objective(s)
Compliance with the provisions of the Protection of the Environment Operations (Waste)
Regulation 2005.
Maximise reuse/recycling of waste material and minimise waste disposed of to landfill.
Action(s)
Action/phase Responsibility
Construction and demolition
Maintain the site in a clean and tidy condition at all times. Contractor
Ensure waste is placed in skip bins positioned in defined area(s) onsite or within the site compound (if required).
Contractor
Avoid surplus construction materials through appropriate planning of the construction works.
Contractor
Recycle waste in accordance with the NSW Government’s Waste Reduction and Purchasing Policy.
Contractor
All waste materials produced by the proposal would be assessed, classified, managed and disposed of in accordance with the Waste Classification Guidelines (DECCW, 2009) and the waste management hierarchy.
Contractor
Classify and dispose of waste (if unable to be reused or recycled) in accordance with the EPA Waste Classification Guidelines (EPA 2014).
Contractor
Any waste material identified as being contaminated would be managed in accordance with the Contaminated Land Management Act 1997 and other relevant legislation.
Contractor
Limit smoking to defined areas and provide butt bins for construction workers.
Contractor
7.2.10 Bushfire hazard
Objective(s)
Minimise potential bushfire hazard associated with the construction and operation of the
proposal.
Action(s)
Action/phase Responsibility
Construction and demolition
Avoid undertaking hot work (such as welding) outside during dry weather or periods of prolonged bushfire risk.
Contractor
In the event of a bushfire, work is to cease and workers evacuated in accordance with standard emergency response procedures.
Contractor
Design of above ground items must be in accordance with the bushfire protection measures included in the RFS guideline Planning for Bushfire
Contractor
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Protection 2006.
Shrubs are not to be planted close to any buildings. Contractor
Fences, sheds and structures should be constructed of non-flammable material and be clear of trees and shrubs.
Contractor
Operational
General site maintenance to be undertaken as per existing maintenance procedures in order to minimise bushfire risk.
DJ
All grasses are to be maintained to a height of a maximum 50mm. DJ
The crowns of trees should be separated where practical such that there is a clear separation distance between adjoining tree crowns.
DJ
Prune lower branches of trees to stop a surface fire spreading to the canopy of the trees.
DJ
Trees or shrubs are to be regularly cleared of any dead material. DJ
Gas cylinders to be stored in an area that is clear of all flammable material and securely tethered with non-flammable fastenings to prevent toppling over.
DJ
Driveways and access ways must allow for the safe passage for emergency vehicles to all buildings and assets on the land.
DJ
Roof gutters should be free of leaves and other combustible material. DJ
7.2.11 Visual
Objective(s)
Minimise the visual impact of the proposal on surrounding land uses.
Action(s)
Action/phase Responsibility
Construction and demolition
Maintain construction sites in a clean and tidy condition at all times. Contractor
Ensure all work equipment and materials are contained within the designated boundaries of the work site.
Contractor
Limit construction vehicles and personnel on site to those needed for that activity, with all excess equipment moved off-site to reduce visual impacts.
Contractor
Operational
The detailed design of the proposal would take into account relevant urban design and visual considerations.
DJ
Maintain the site in a clean and tidy condition at all times. DJ
Ensure landscaped areas are regularly maintained. DJ
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7.2.12 Socio-economic
Objective(s)
Minimising the potential negative social impacts, particularly in relation to housing and
community facility and welfare needs related to the proposal.
Enhancement of the positive economic and social impacts of the proposal.
Action(s)
Action/phase Responsibility
Construction and demolition
Consultation with the community to understand concerns regarding the proposal. Communications materials should then be developed addressing their key concerns.
Contractor
Consultation with affected adjoining landholders should be respectful and ongoing to ensure impacts are minimised.
Contractor
A construction environmental management plan should address impacts to adjoining landholders and complied with during construction. A similar plan would need to be developed for demolition.
Contractor
Construction and demolition workforce should be sourced locally with appropriate training opportunities provided for residents within the region.
Contractor
Consultation with local government and businesses and service providers should be undertaken to ensure that the required workforce can be accommodated within Wellington. If this will cause excessive pressure alternative locations should be considered for workforce accommodation.
Contractor
Preparation of an employment management plan should be prepared prior to demolition of the proposed temporary facility. The plan should consider opportunities to retain workers on site, relocation of workers to other CSNSW sites or retraining programs so that workers can stay within the local area.
Contractor
Operational
Work with Council, tourism authorities and the local business community to maintain a positive image about the proposal to maintain a positive image about the town and encourage investment.
DJ
Collaboration with NSW Police, PCYC, Gungie Origin and other community and health service providers should be undertaken to ensure that crime rates in the area are monitored and managed.
DJ
The existing facility should seek opportunities to expand current levels of involvement in the local community as a result of the proposal.
DJ
Consultation with health, emergency, education service providers and local government should be undertaken to ensure there is existing capacity for future inmates families and additional staff to the area can be accommodated.
DJ
Future workforce for the centre should be sourced locally where possible. Consider training and upskilling of local population for suitable employment opportunities at the expanded correctional facility. Training and upskilling should continue throughout the life of the proposed facility so that employees have transferrable skills for when the temporary facility closes.
DJ
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Consultation with local governments and real estates should be undertaken to assess housing market for staff moving to the area. Should there be insufficient housing stock it is suggested that staff are accommodated at alternate locations.
DJ
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8. Conclusion
This section provides a conclusion to the REF, including a summary of the proposal
justification and the findings of the REF.
This REF considers the potential impacts of the proposal to construct and operate a 400 bed
temporary correctional accommodation facility at Wellington. It has been prepared by GHD on
behalf of DJ to assist with determination of the proposal under Part 5 of the EP&A Act.
8.1 Justification of the proposal
The proposal forms part of DJ’s Prison Bed Capacity Program, which is being undertaken to
meet the unprecedented and unanticipated rise in inmate numbers in recent years, which has
exceeded previous inmate population projections. This has placed demand pressures on the
correctional system and has resulted in a number of inefficiencies and operational challenges.
The proposal would respond to long term growth forecasts through the provision of additional
prison beds and associated infrastructure in the area.
8.2 Summary of REF findings
The REF has considered the potential impacts of the proposal. It has been prepared in
accordance with Part 5 of the EP&A Act, and in particular, the requirements of section 111 of
the Act, and clause 228 of the Regulation. The REF has documented the potential
environmental impacts of the proposal, considering both potential positive and negative impacts,
and recommending management and mitigation measures to protect the environment where
required.
8.2.1 Clause 228 considerations
Clause 228 of the Regulation specifies the matters that must be taken into account, for the
purposes of Part 5 of the Act, when consideration is being given to the likely impact of an
activity on the environment. The potential impacts of the proposal have been considered in
sections 6.1 to 6.12 of the REF. The Clause 228 matters and how they relate to the proposal
are considered in Appendix A.
8.2.2 Ecologically sustainable development
DJ is committed to ensuring that its projects are implemented in a manner that is consistent with
the principles of sustainable development. These principles would be incorporated into the
management systems for the proposal.
Appendix A summarises how the principles of ecologically sustainable development adopted by
the EP&A Act have been addressed by the REF process.
8.2.3 Significance of impacts
Whilst some potentially negative impacts may result from the proposal, these impacts would be
short-term and localised and are not considered to be significant. Section 7.2 of the REF
provides the mitigation measures that would be implemented to reduce the potential for impacts
and manage the environmental performance of the proposal.
8.3 Conclusion
The REF identifies that the proposal would have the potential for both positive and negative
impacts, and it identifies mitigation measures to reduce or manage the negative impacts.
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Environmental investigations were undertaken during preparation of the REF to assess the
potential environmental impacts.
There are considered to be no significant environmental issues associated with the proposal.
Any potential adverse impacts resulting from the proposal are considered manageable through
the implementation of mitigation measures in section 7.2.
In conclusion, the proposal is needed in order to address demand pressures on the correctional
system that has resulted in a number of inefficiencies and operational challenges. It is
considered that the adverse environmental impacts would be generally short-term and localised
in nature. With the adoption and implementation of the proposed mitigation and management
measures listed in section 7.2 the potential environmental impacts of the proposal would be
adequately mitigated and managed, and are not considered to be significant.
8.4 Recommendation
It is recommended that environmental management plans be developed prior to
commencement of the construction and demolition phases of the proposal, incorporating the
mitigation measures outlined in section 7.2 of this REF.
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