Surface and Groundwater Impact Assessments May 2021

Great Western Highway Upgrade - Medlow Bath Surface and Groundwater Impact Assessments May 2021

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Transport for New South Wales Great Western Highway Upgrade - Medlow Bath Surface and Groundwater Impact Assessments May 2021

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Issue and Revision Record

Revision Date Originator Checker Approver Description A 03/03/2021 J. Mail S. Reilly Coordination Draft B 25/05/2021 J. Mail S. Reilly N. Wade Technical Paper Issue

Document reference: 419899 | 02 | B

Information class: Standard

This document is issued for the party which commissioned it and for specific purposes connected with the above- captioned project only. It should not be relied upon by any other party or used for any other purpose.

We accept no responsibility for the consequences of this document being relied upon by any other party, or being used for any other purpose, or containing any error or omission which is due to an error or omission in data supplied to us by other parties.

This document contains confidential information and proprietary intellectual property. It should not be shown to other parties without consent from us and from the party which commissioned it.

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Contents

Executive summary 1

Glossary and Abbreviations 2

1 Introduction 3 1.1 The Proposal 3 1.1.1 Proposed alternative intersection at Bellevue Crescent 4 1.1.2 Transport Accessibility Program 5 1.2 Design 6 1.2.1 Design Criteria 6 1.3 Objectives 7 1.3.1 Program Objectives (GWHUP) 7 1.4 Purpose of the Report 7

2 Methodology 8 2.1 Study Approach 8 2.2 Legislation 8

3 Existing environment 10 3.1 Regional Context 10 3.2 Climate 10 3.3 Land Use 12 3.4 Surface water features 13 3.5 Geology and soils 13 3.6 Groundwater recharge 14 3.7 Registered groundwater users 14 3.8 Groundwater dependent ecosystems 15 3.9 Contaminated sites 17 3.10 Water quality 18

4 Potential impacts 19 4.1 Concept design 19 4.1.1 Drainage design 19 4.2 Construction impacts 20 4.3 Operational impacts 20 4.3.1 Surface water impacts 20 4.3.2 Scour 20 4.3.3 Water quality 21 4.3.4 Groundwater 21

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4.4 Climate change 21

5 Mitigation measures 22 5.1 Construction measures 22 5.2 Operational measures 22

6 Recommendations 25

7 References 26

A. Catchment Mapping 27

B. Drainage Concept Design 28

C. NorBE Assessment Summary 29

D. Protected Matters Report 30

Tables Table 1.1: Key Design Criteria 6 Table 3.1: Schedule of Cross Drainage Structures 13 Table 3.2: Registered bore data 15 Table 4.1: Drainage Standard of Design Drainage Structures 19 Table 5.1: Mitigation Measures 23

Figures Figure 1.1: GWH Upgrade Proposal 3 Figure 1.2: Proposed alternative intersection at Bellevue Crescent 4 Figure 3.1: Study Area and Topography 10 Figure 3.2: Average Monthly Rainfall Data 11 Figure 3.3: Average Monthly Temperature Data 11 Figure 3.4: Land Parcels and Aerial Imagery of Land Use 12 Figure 3.5: Registered bores near Medlow Bath 14 Figure 3.6: Sydney Basin Blue Mountains, Grose RIver 16 Figure 3.7: Sydney Basin Blue Mountains, Coxs River 17 Figure 5.1: CD3370 Discharge Mitigation 23 Figure 5.2: CD4220 Discharge Mitigation 24

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Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 1 Surface and Groundwater Impact Assessments

Executive summary

A desktop surface and groundwater assessment has been undertaken to assess existing conditions of the Great Western Highway at Medlow Bath, and the potential impact of the road upgrade on the local and regional groundwater system, and water quality reaching watercourses.

Existing drainage structures and the flow of runoff has been determined through a separate hydrology and hydraulic assessment, with the standards of these structures vary substantially from approximately 10% AEP to greater than 1% AEP. These catchments comprise a number of pollutant sources including a variety of land use and transport infrastructure.

A summary of the main impacts of the proposal as determined through the assessment are noted below:

● The upgrade of Great Western Highway and some local access road improvements would affect the volume and peak runoff rates from the upstream catchments. ● Pollutant loads from the widened road infrastructure will provide increased runoff pollutants from the new road pavements ● New excavation to the road corridor where widening occurs toward the southern end of the proposal will have local impacts on the groundwater levels of the area Upon analysis of the potential impacts the following recommendations are made:

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Glossary and Abbreviations

Term Definition and Abbreviation AHD Australian Height Datum, the datum of vertical control mapping in metres AEP Annual Exceedance Probability ARI Annual Recurrence Interval EPA Environment Protection Authority GDE Groundwater Dependent Ecosystems GWH Great Western Highway GWHUP Great Western Highway Upgrade Project NorBE Water quality assessment standard: Not worse or better than (existing conditions) OEH Office of Environment and Heritage RCP Reinforced Concrete Pipe REF Review of Environmental Factors TfNSW Transport for New South Wales, formerly known as RMS

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1 Introduction

1.1 The Proposal Transport for NSW (Transport for NSW) proposes to upgrade approximately 1.2 kilometres of the Great Western Highway at Medlow Bath between Railway Parade and approximately 330m south of Bellevue Crescent (the proposal). This upgrade is part of the Great Western Highway Duplication project between Katoomba and Lithgow which aims to provide a safer and more efficient link between Central West NSW and the Sydney Motorway Network for freight, tourist and general traffic.

In addition to the road modifications, the proposal will also improve active transport links and public transport accessibility.

The proposal is shown in Figure 1.1.

Figure 1.1: GWH Upgrade Proposal

Source: MRB - Medlow Bath Concept Design

Key features of the proposal would include:

● Construction of a four lane divided carriageway with consolidated access points at upgraded intersections including. – Upgraded Bellevue Crescent intersection to include three way traffic signals for safe access/egress – Provision of a U-turn bay for traffic turning east bound to west bound at Bellevue Crescent – Right turn bay in east bound carriageway median for Hydro Majestic Hotel (no right turn egress) – Improvements on Railway Parade to formalise parking provisions, U-turns and commuter parking

● Construction of full depth highway pavement and associated local road, driveway, footpath, kerb and gutter reconstruction work within the proposal area

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● Construction of a new pedestrian bridge that connects Railway Parade, Medlow Bath Station and new indented bus bays on both sides of the Highway in line with Transport Access Program requirements (See 1.1.1) ● Shared use (pedestrian/cyclist) path adjacent to westbound carriageway ● Retaining wall and traffic barrier construction adjacent to existing rail corridor ● Utility relocation and stormwater drainage upgrade as required over length of the project including water quality control measures in Railway Parade ● Provision of 6m raised landscaped median for trees protected with modified redirective kerb.

1.1.1 Proposed alternative intersection at Bellevue Crescent As part of the design for the proposal, a new alternative signalised intersection is being considered to the Great Western Highway with a new road through vacant Lots to connect to the existing Bellevue Crescent and approximately 25 metres south of the United Petrol Station (refer to Figure 1.2).

Figure 1.2: Proposed alternative intersection at Bellevue Crescent

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Source: MRB - Medlow Bath Concept Design

At the time of writing of this report, an alternative design was being considered for Bellevue Crescent includes the following key design features:

● A signalised intersection will be built along the southern perimeter of the United Petrol Station in Medlow Bath utilising a corridor (anticipated to be 20 metres) through vacant Lots. ● Closing the existing Bellevue Crescent and Great Western Highway intersection but still maintaining a service road/shared zone for the properties fronting the highway ● Creating new access options from Bellevue Crescent to the petrol station Hydro Majestic Pavillion ● Allows left and right turns out of Bellevue Crescent on to the Great Western Highway (enabling west and east bound movement) and left turn into new Bellevue Crescent from Great Western Highway westbound

1.1.2 Transport Accessibility Program The NSW Government is improving accessibility at Medlow Bath Station. This portion of the project is being delivered as part of the Transport Access Program (TAP), a NSW Government initiative to provide a better experience for public transport customers by delivering accessible, modern, secure and integrated transport infrastructure.

As part of this program, the Medlow Bath Station Upgrade (part of the proposal) would provide a station precinct that is accessible to people with a disability or limited mobility, parents/carers with prams, and customers with luggage.

The key features of the TAP project included within the proposal are summarised as follows:

● construction of a new pedestrian footbridge including: – four new lifts to provide access between the footbridge, bus stops on the Great Western Highway, Station platforms and Railway Parade – provision of accessible paths between the lifts, stairs and bus stops on the Great Western Highway ● upgrade of the station entrance on Railway Parade including: – modifications to the commuter car park along Railway Parade, and provision of new accessible parking spaces – provision of a new accessible kiss and ride space on Railway Parade adjacent to the new station entry – provision of accessible paths between the footbridge entry, kiss and ride and accessible parking ● upgrade of the station power supply to provide adequate power for the new footbridge and lifts ● modifications to overhead wiring and HV at the station to accommodate the construction of the new footbridge ● internal station building work including: – minor building modifications that may be required to accommodate new or upgraded electrical equipment including a main switchboard, new or upgraded station communications equipment and other station services ancillary work including adjustments to lighting, relocation or replacement of existing customer facilities (platform seating, bins, payphone, Opal card readers, fencing) and improvement to station systems including additional closed circuit television (CCTV) cameras, hearing loops and wayfinding signage.

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1.2 Design The following sections provide a description of the design criteria, major design features and engineering constraints of the proposal. These features are based on the concept design and would be further refined during detailed design.

1.2.1 Design Criteria The concept design for the proposal was prepared in accordance with the following standards:

● T HR CI 12030 ST Overbridges and Footbridges Design Standard (Transport for NSW, 2020) ● Australian Standards: amended by RMS Supplement (2012) ● Austroads Guide to Road Design (Austroads, 2009) and RMS supplements to the Austroads Guide ● Austroads Road Safety Audit Manual (Austroads, 2009) ● Beyond the Pavement 2020: Urban design approach and procedures for road and maritime infrastructure planning, design and construction (Transport for NSW Centre for Urban Design, 2020) ● NSW Speed Zone Guidelines (Roads and Traffic Authority of NSW, 2011) ● Road Safety Audit Manual and Checklist (Roads and Traffic Authority of NSW, 2011) ● RMS Delineation Manual (2012) ● RMS Road Design Guide (RMS, undated) ● Soils and Construction – Managing Urban Stormwater, Volume 1 (Landcom, 2004) and Volume 2D (Department of Environment and Climate Change, 2008). Guide to Road Design – Austroads (Austroads, 2009). ● Disability Standards for Accessible Public Transport 2002 (DSAPT)

Table 1.1: Key Design Criteria Design Features Requirement Number of lanes Typical lane arrangement of two lanes in each direction with some turning lanes (for access to roads off Great Western Highway and to key commercial places. Lane widths 3.35m for through lanes and 3.30m for turn lanes (plus lane widening at curves, as required). Design vehicle for main road Main road alignment - 19 metre B-Double (over 50 tonnes) Alignment Design vehicle at intersections Bellevue Crescent (including u-turn) –prime mover and semi-trailer (up to 19 metres) Right hand turn bay into Hydro Majestic Hotel – service vehicle (upto 8.8m) Posted Speed Limit Main road alignment - 60km/h Side roads – 50km/h Design Speed Main road alignment - 70km/h Intersection (at Bellevue Crescent) – 60km/h Turn in to side roads – 60km/h Median width Southern portion (at Bellevue Crescent intersection) – 5.10 metres southern approach and 1.8 metres for northern approach to allow for right hand turn bay at signals. Mid portion (at Hydro Majestic Hotel) – typically 5.10m raised median and 1.80 metres at right hand turn bay into the hotel. Northern portion (between Hydro Majestic Hotel and Railway Parade) – 1.8 metres Pavement type Pavement structure which would consist of asphalt over lean mix concrete and consider acoustic requirements. Footpaths/cycle paths and Southern portion (at Bellevue Crescent intersection) – includes a shared zone for local traffic only shared zones (to access 100 to 104 Great Western Highway) and pedestrians and is typically 6.7 metres wide Mid portion (at Hydro Majestic Hotel) – 2.5 metre shared path on the western side of the road and pedestrian path from footbridge to bus stop on the eastern side. Northern portion (between Hydro Majestic Hotel and Railway Parade) – 2.5 metre shared path on the western side of the road

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Design Features Requirement Pedestrian Bridge To allow safe access to the area, a pedestrian bridge (including stairs and lifts) will be installed to span from Railway Parade to Medlow Bath Station and then across to the western side of Great Western Highway (as well as access to the eastern side of the Highway to enable use of bus stop serviced by east bound services). Flood Considerations Not considered to be within a flood prone area. One in 100 Average Recurrence Interval (ARI) Minor and Major Tributary flood under current climatic conditions.

1.3 Objectives

1.3.1 Program Objectives (GWHUP) The Great Western Highway (GWH) is a 201-kilometre highway crossing of the Great Dividing Range through the World Heritage listed Blue Mountains, connecting Bathurst and the surrounding Central West and Orange regions to Sydney.

Crossing the Great Dividing Range, the GWH follows a narrow and difficult alignment constrained by the Blue Mountains National Park, steep topography, a railway line and existing towns for which the highway acts as the main street.

The highway’s topography and constrained two lane carriageway design (which in places is almost 200 years old) results in the following constraints:

● reduces freight efficiency by limiting access for safer and more sustainable high productivity vehicles ● limits access during incidents and natural disasters ● slows travel speeds with limited overtaking opportunities and steep gradients (more than double the recommended maximum level) ● causes delays of up to 80 minutes in peak times ● has higher than state average crash rates ● impairs amenity for local communities with high through traffic volumes and congestion, and ● Without the GWH Upgrade Program, the infrastructure along the Katoomba to Lithgow section will continue to face a number of challenges and related impacts.

1.4 Purpose of the Report The purpose of this report is to provide a detailed analysis for input into the Review of Environmental Factors (REF), as required under Part 5 of the Environmental Planning and Assessment Act 1979 (EP&A Act). This report summarises the impacts from the operation and construction of the proposed upgrade on surface water and groundwater including sensitive receptors in accordance with the assessment requirements for the Great Western Highway Upgrade at Medlow Bath.

This includes:

● Identification of existing surface water and groundwater conditions. ● Assessment of the potential construction impacts as a result of the works. ● Assessment of the potential operational impacts as a result of the works. ● Development of a high-level strategy including mitigation measures for minimising impacts to as a result of the works. ● Make recommendations for further investigations and opportunities for impact mitigation. A hydrology and hydraulic assessment has been provided in a separate technical paper detailing the impacts of the proposal on the drainage and flooding aspects of the proposal, covering changes to the volumes of runoff anticipated from the contributing catchments.

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2 Methodology

2.1 Study Approach The Medlow Bath proposal for upgrade of the Great Western Highway is in the vicinity of multiple tributaries comprising ephemeral streams that feed into the larger river systems of the Coxs River and Grose River. These catchments are predominantly native vegetation with small portions of urban development located adjacent the transport corridor of the GWH and adjacent rail corridor.

The proposed upgrade includes changes in the road geometry and widening which creates changes the groundwater table adjacent the cut areas and results in an overall increased paved area. This can change the existing groundwater infiltration and alter the flow paths of surface water as it becomes runoff and is discharged to existing sensitive receivers including environmental communities and adjacent commercial and private properties. To mitigate the changes in these potential water quality risks and to address the requirements of the proposal, this assessment approach includes:

● Collation, analysis and interpretation of the available sensitive ecosystem and groundwater bore data including registered users. ● An assessment of the existing soil and potential contamination conditions, including a review of exiting subsurface strata from geological records and geotechnical data. ● Review of contribution pollutants from the existing catchment ● Preparation of a high-level water quality strategy accounting for both increases and changes in the surface and groundwater transportation. ● Assessment of potential impacts to water quality through the neutral or beneficial effect on water quality (NorBE) assessment tool published by WaterNSW, as a result of the proposal.

This assessment was based on the following information: ● Combined digital rail utility plans for the corridor, or DSS data. ● GIS layouts for planning and environmental characteristics of the area, and the proposal area. ● Draft masterplans for the recreational area at Medlow Park. ● CAD Concept Design layout data including preliminary proposed drainage network. ● LiDAR and detailed survey in digital formats from government agencies including Geoscience Australia and TfNSW, respectively. ● Rainfall, groundwater and bore data by the Bureau of Meteorology ● Contaminated land data by the NSW Environment Protection Authority (EPA)

2.2 Legislation Legislation and guidelines relating to works within flood liable land in New South Wales include:

● Environmental Planning and Assessment Act 1979. ● Protection of the Environment Operations Act 1997. ● Protection of the Environment Administration Act 1991. ● Local Government Act 1993. ● State Emergency Service Act 1989. ● State Emergency and Rescue Management Act 1989.

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● Water Act 1912. Licencing through OEH is required (under Section 112 of the Water Act 1912) prior to the installation of any bores for potential purposes of investigation, extraction, dewatering, testing or monitoring during construction. ● Water Management Act 2000. ● Water Sharing Plan for the Greater Metropolitan Region Groundwater Sources 2011 ● The State Environmental Planning Policy (Sydney Drinking Water Catchment) 2011

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3 Existing environment

3.1 Regional Context The Great Western Highway traverses a ridgeline running approximately north to south between the Grose River catchment to the east and the Coxs River catchment in the west. Local watercourses in the vicinity of the study area comprise Adams, Young and Rocky Creek tributaries of the Grose River, and Pulpitt Hill and Back Creek tributaries of the Coxs River.

The study area covers 10.58ha including Medlow Bath station and transport interchange, as well as Medlow Park to the east and downstream of the major sag location and cross drainage structures for the transport corridor. This major sag just south of the existing railway station collects runoff from the majority of the study area and directs the flow to the receiving Adams Creek to the west. Smaller portions of the study area drain to the remaining watercourses.

Figure 3.1 indicates the topographical features in the vicinity of the study area, including the location of receiving watercourses.

Figure 3.1: Study Area and Topography

Source: Open Topo Map by OpenStreetMap

3.2 Climate Average monthly rainfall for the nearest rainfall station at Katoomba (063039, Murri Street) indicates the area experiences larger summer rainfalls than during the winter months. This is indicated in the Figure 3.2 average monthly plot, with the annual average rainfall at 1400mm across the 134 year record.

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Figure 3.2: Average Monthly Rainfall Data

Source: Bureau of Meteorology Climate Data (2021)

The average monthly minimum and maximum temperatures are displayed on Figure 3.3 showing the variability throughout the year based on the full 92 year record at Katoomba, approximately 4km from the study area.

Figure 3.3: Average Monthly Temperature Data

Source: Bureau of Meteorology Climate Data (2021)

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3.3 Land Use The central corridor of Medlow Bath comprises the road and adjacent rail corridor in a north-south alignment, with a predominantly commercial land use immediately adjacent to the road corridor on the western side of the transport corridor. Beyond the rail alignment to the east is predominantly a residential land use with community and recreational uses also. The Medlow Park recreational area is included within the study area, for which a Medlow Park - Draft Plan of Management for Adoption (Blue Mountains City Council, March 2013) study indicates the future objectives for the site.

Figure 3.4: Land Parcels and Aerial Imagery of Land Use

Source: RPS Concept Design spatial mapping

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3.4 Surface water features The table below indicates the existing cross drainage structures along the GWH providing capture and conveyance of upstream runoff. These culverts have been identified from the detailed survey information including the invert level, position and dimension of the culvert.

Table 3.1: Schedule of Cross Drainage Structures Cross drainage Chainage Existing Invert inlet Invert outlet structure CX3480 3480 1 x 375mm RCP 1059.390 1058.990 CX3770 3770 1 x 450mm RCP 1056.409 1056.095 CX3960 3960 1 x 450mm RCP 1053.341 1053.016 CX4200 4200 1 x 450mm RCP 1048.542 1047.894 CX4220 4220 1 x 375mm RCP 1048.580 1048.470 *RCP Reinforced Concrete Pipe

The hydrological standard of the culvert is theoretical and the actual performance relies on the degree to which sediment and debris build-up and vegetation intrusion prevents the free draining flow through the stormwater system. The hydrological standard has been assessed through the development of an existing conditions DRAINS model, inclusive of the regional catchments delineated by review of LiDAR and detailed survey, and key features of the stormwater drainage system comprising:

● Pipes ● Culverts ● Open channels ● Headwalls The catchments are mapped in GIS and attached in Appendix A. Due to the small and urban nature of the upstream catchments, the flow regime reflecting the critical storm conditions are consistently short and flashy events with high intensity rainfall. Some assumptions have been made on the size of cross drainage structures downstream of CX3770, CX3960, CX4200 in the rail corridor as this information is not embedded into the DSS digital utility information on the drainage features within the corridor.

3.5 Geology and soils The area is characterised by the crest along which the GWH runs in a north south direction, with the steep escarpments on either side of Medlow Bath, with geological mapping indicating rocks and residual soils of the Narrabeen sedimentary group. A search of the NSW Department of Planning, Industry and Environment eSPADE website (undertaken on 27 November 2020), and the 1:100,000 Geology of Penrith Map (Geological Survey of NSW, 1991), identifies the regional geology of the Study area as Medlow Bath (residual), characterised by a combination of Warragamba (colluvial), Hassans Walls (colluvial) and Wollangambe (erosional) landscapes adjacent to the study area.

There are no known sites or risk of acid sulphate soils occurring in the vicinity of the study area based on a search of the Department of Planning, Industry and Environment’s database on Eastern Australian Acid Sulphate Soils (undertaken on 26 November 2020).

Refer the Medlow Bath Stage 1 Contamination Report for further details.

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3.6 Groundwater recharge Through inspection of typical landscape characteristics of the area through The Department of Planning, Industry and Environment eSPADE website, the sandstone escarpment is associated with moderately to steeply inclined colluvial slopes and drainage lines.

Without the presence of contaminated land parcels on the NSW EPA contaminated land record (undertaken on the 8 December 2020 for records within the Blue Mountains City Council) within the vicinity of the study area, the general groundwater quality is considered high.

3.7 Registered groundwater users A review of local registered bores near the proposal area was conducted on 25th February 2021 using both:

● NSW groundwater map (WaterNSW), and; ● Australian Groundwater Explorer (Bureau of Meteorology) Two bores within the township of Medlow Bath were identified, both for the purpose of water supply. The location of these is indicated in Figure 3.5 with the key data summarised in Table 3.2. No monitoring data is available for the bores, with depths ranging from 46.8m up to 96.0m.

Figure 3.5: Registered bores near Medlow Bath

Source: Australian Groundwater Explorer (BOM, 2021) and Open Topo Map

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Table 3.2: Registered bore data Bore ID Purpose Bore Depth (m) Elevation (m AHD) Salinity Status GW061451 Water Supply 46.8 1053.59 Unknown Unknown GW115835 Water Supply 96 Unknown Unknown Unknown Source: Australian Groundwater Explorer (BOM, 2021)

The desktop review has returned no groundwater quality data and based on the location and type of bores in the area groundwater use is limited and the primary beneficial use of groundwater in the vicinity of the site would be environmental (ie providing base flow to waterways).

3.8 Groundwater dependent ecosystems Review of potential Groundwater Dependent Ecosystems (GDE) was performed using the Australian Groundwater Explorer tool (BOM, 2021), identifying the locations of GDE in the two receiving catchments. The mapped GDEs included “aquatic” ecosystems that rely on the surface expression of groundwater, and “terrestrial” ecosystems that rely on the subsurface presence of groundwater. No moderate and high potential GDEs were located in and surrounding the proposal area, and given the distance from the proposal it is not expected that there would be an impact. Figure 3.6 and Figure 3.7 indicate the high priority groundwater dependent ecosystems in the receiving Grose/Nepean River catchment and Coxs River Catchment respectively.

To the west of the proposal area moderate potential and high potential GDE are located in the valley of the Cox River catchment. A search for the wider local government area reveals Commonwealth listed threatened species are likely or known to live in the area. For a full listing of the species refer to Appendix D protected matters report.

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Figure 3.6: Sydney Basin Blue Mountains, Grose River

Source: Appendix 2 - Water Sharing Plan for the Greater Metropolitan Region Groundwater Sources 2011

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Figure 3.7: Sydney Basin Blue Mountains, Coxs River

Source: Appendix 2 - Water Sharing Plan for the Greater Metropolitan Region Groundwater Sources 2011

3.9 Contaminated sites As described in the Medlow Bath Phase 1 Preliminary Contamination Assessment Report no sites within the study area are identified as contaminated through Council and EPA held records. However, the report highlights the likelihood of localised contamination from the petrol station and fill material adjacent to the rail corridor.

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3.10 Water quality Water draining from the subject area via the Grose River and Coxs river catchments are subject to controls under the Sydney Drinking Water Catchment. The requirements of the State Environmental Planning Policy (Sydney Drinking Water Catchment) 2011 for proposals within drinking water catchments is that an assessment must be carried out to the NorBE guidelines for demonstration of a neutral or beneficial effect on water quality. Refer section 4.3.3 for the potential impacts of the project on water quality, section 5.2 for the mitigation of impacts, and Appendix C for NorBE assessment summary.

Runoff from the study area under existing conditions is directly from the cross drainage structures through Rail cross drainage culverts to the receiving drainage network in local roads and surface flows within the road corridor.

Minimal existing treatment measures are installed to the urban runoff system prior to discharge to the natural receiving watercourses.

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4 Potential impacts

The sections below describe the potential impacts of the proposed GWH upgrade, including a description of construction and operational impacts. The potential impact of future development and climate change inform the operational impacts of the upgrade proposal.

4.1 Concept design The proposal includes widening of the road from south of Bellevue Crescent to north of the Medlow Bath Station at the intersection of the Great Western Highway with Station Street and Railway Parade. This widening increases the area of road pavement including formalisation of the existing verge area to new road pavement and verge profile, and additional cut/fill to enable widening of the road corridor. Significant change to the road vertical geometry is not proposed due to the multiple interfaces along the corridor at existing properties, driveways and roads.

4.1.1 Drainage design The design includes provision for capture of surface runoff from the road corridor and conveyance in a pit and pipe network. This is a significant upgrade on the existing conditions where minimal piped infrastructure exists. The existing cross drainage discharge locations across the rail corridor are to be maintained to continue the connectivity of flow paths to the downstream receiving watercourses. These discharge locations are typically open drains leading to the rail corridor or existing overland flow paths in Medlow Park. Table 4.1 below summaries the new and retained cross drainage structures for the Great Western highway upgrade. The TfNSW design criteria for blockage of cross drainage structures has not been considered in the capacity assessment below, but will form part of the design criteria for the cross drainage structures in Detailed Design. Refer section 5.2 for discussion of the mitigation measures associated with the cross drainage system.

Table 4.1: Drainage Standard of Design Drainage Structures Cross Chainage Drainage structure Approximate Comments drainage Standard CD3370 3370 1 x 600mm RCP 1% AEP with Discharges to new basin. Climate Change Refer to mitigation measures identified in section 5.2 RD3770* 3770 1 x 450mm RCP 1% AEP Existing GWH cross drainage removed. Pipe connection to rail and headwall connection to remaining rail drainage cross drainage pipe. RD3960* 3960 1 x 450mm RCP 10% AEP Existing GWH cross drainage removed. Pipe connection to rail and headwall connection to remaining rail drainage cross drainage pipe. RD4200* 4200 1 x 450mm RCP 20% AEP Existing GWH cross drainage removed. Pipe connection to rail and headwall connection to remaining rail drainage cross drainage pipe. CD4220 4220 1 x 600mm RCP 1% AEP with Discharges to new basin via upsized rail cross Climate Change drainage Refer to mitigation measures identified in section 5.2 *Note the RD drainage series are lateral connections from the pipe drainage network to the rail cross drainage. Refer section 5.2.

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4.2 Construction impacts During construction activities there are areas of vegetation being cleared, demolition of existing pavements and in-ground structures, trenching and general excavation and fill to achieve the desired road grading and verge profiles. These activities have the potential to cause the following impacts:

● areas of disturbed ground raises the potential for sediment transport, particularly during periods of wet weather with overland flows carrying the sediment. ● vehicle movements including temporary access and through traffic diversions in the area also creates disturbances to sediment increasing the risk of sediment transport either immediately through vehicle movements or subsequently through wind and water runoff. ● blockages in the waterways and drainage lines temporarily due to earthworks and other construction activities. Blocking or diversion of local drainage lines may result in localised flooding upstream of the safety works and may change the ultimate discharge location of overland flows into the receiving watercourses. ● diversion of drainage lines may create localised areas of flooding and scour. These temporary impacts are expected to be minor and would be managed through the implementation of standard construction techniques. ● drawdown of groundwater levels to surrounding landuses including affects to groundwater use and settlement of adjacent structures ● pollution of groundwater due to leaching of contaminants ● changes to the groundwater movement and resources, resulting in changed conditions for groundwater dependent ecosystems

4.3 Operational impacts This section identifies areas where there is a major change to existing impervious areas or change in horizontal/vertical alignment which would result in changes to upstream flood levels or downstream peak flow rates affecting properties, or related environmental impacts. It also identifies future upgrade considerations due to the potential impact on peak flows of future development and climate change.

4.3.1 Surface water impacts Upstream impacts are caused by increased runoff volumes by the increase in impervious portions of catchments, the increase in catchment size through regrading of the area to create the design pavement profiles, or the redistribution of flows as a result of a change in the formal drainage infrastructure. All three components are influencing the post construction flood impacts however the impacts are generally considered minor, with a limitation of vertical alignment changes, maintenance of flow discharge splits to downstream receivers, and general increase in available stormwater storage within the drainage system.

Downstream flooding impacts are to be limited through the use of flow control structures at: ● a new detention basin downstream south of the existing cross drainage location (CX3480) where a major flow culvert upgrade across the transport corridor is proposed, ● a new detention basin downstream of the existing sag rail cross drainage location (CX4200 & CX4220) where a major flow culvert upgrade across the transport corridor is proposed, and; ● existing intermediate rail cross drainage locations (CX3770 & CX3960) where the GWH stormwater system discharges flows to the existing rail cross drainage structures without major flow culvert upgrades

4.3.2 Scour Scour potential is increased with higher velocities and larger flow rates than experienced under existing conditions. With the increase in impervious areas as the road widening is constructed, runoff volumes

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Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 21 Surface and Groundwater Impact Assessments

will increase having the potential for scour events in receiving watercourses. Mitigation for this increase in flow rates is proposed at the discharge location to manage potential increases in velocity and peak flow.

4.3.3 Water quality The water quality impacts are partly addressed by this assessment in terms of water quality treatment. The runoff from urban portions of the catchment contribute pollutants in the form of gross pollutants, dissolved solid materials and suspended sediments including organic compounds and oils. Mitigation of the increases in pollutant loadings at discharge locations as a result of larger impervious surfaces within the contributing catchments is discussed in section 5.2. The NorBE assessment carried out for the project, including MUSIC modelling is the quantitative approach to assess the potential impacts and provide a basis of pollutant generation that is used in determination of the mitigation measures.

A separate assessment of the quantity of discharge flows is detailed in the Hydrology and Hydraulics Assessment.

4.3.4 Groundwater All the construction stage potential impacts are relevant in the operational phase including groundwater level drawdown and changes to the access of contaminants to the groundwater. In addition the potential long term affects of the changes in impervious surfaces with road widening could alter the recharge rates in the immediate vicinity and continue the impacts to sensitive receivers such as groundwater dependent ecosystems.

4.4 Climate change The climate change uplift in rainfall intensities as a result of temperature increases under the latest climate projections incorporated into the guidance for stormwater and flooding practitioners, Australian Rainfall and Runoff 2019 (ARR2019), is to be incorporated into design infrastructure. The recommendations for rainfall uplift at the proposed upgrade is 19.7% on the ARR2019 rainfall data for the year 2090. These recommendations are based on a Representative Concentration Pathway (RCP) of 8.5 and provided through the ARR2019 datahub.

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Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 22 Surface and Groundwater Impact Assessments

5 Mitigation measures

During design development, the selection of geometrical alignment of the proposed road pavement has mitigated against significant groundwater impacts. By matching the vertical profile of the design to the existing GWH corridor the likelihood of groundwater drawdown from the construction earthworks interception of the groundwater tables is significantly reduced.

5.1 Construction measures Construction mitigation measures are comprised of the following items including a range of standard construction techniques previously used on similar projects and recommended by the literature:

● Sediment basins – for the collection of runoff sediment through reduction of velocity of runoff flows. Sedimentation basins are to be maintained through emptying of sediment build-up after each rainfall event causing the transportation of material from the construction footprint. ● Flow diversion bunds and catch drains– redirection of overland flows to dedicated management areas including sediment basins and ultimately to discharge locations, to be implemented in the initial stages of construction for discharge quality management and flood risk management. ● Sediment fencing – implemented in a similar approach as for flow diversion bunds but for use in areas only experiencing minor upstream contributing catchments. ● Check dams – velocity managing devices for installation into flow paths particularly in areas with steep gradients. ● Level Spreader – at all discharge locations to the natural surface, level spreaders should be used to reduce velocity and depth of the flows reaching the natural watercourses. ● Exclusion zones for fill placement - limits the exposure of stockpiles from the risk of washing into overland flow paths ● Stabilised construction entry – removes a large portion of sediment from vehicles prior exit from the construction areas to public roads. Assists in containing sediments These measures are to be implemented in accordance with the ‘Blue Book’ guidelines or Managing Urban Stormwater – Soils and Construction Volume 1 (Landcom 2004).

● During construction, monitor groundwater levels where potential impacts in the form of damage to buildings from settlement, is possible as a result of shallow groundwater conditions prior construction. If lowering of the water table is identified, then further mitigation measures will be implemented. ● Store potential contaminants in specific bunded enclosures to prevent the possibility of groundwater contamination in the event of spills from stored construction materials

5.2 Operational measures The following list of measures indicates a baseline methodology for mitigating the increases in runoff volume, pollutant loads and peak flow as a result of the proposed upgrade.

● Water quality (Biofiltration) basins - embedded biofiltration inside water quantity management basins provide water quality improvements of the discharge runoff from the permanent stormwater system. A basin including minimum 160m² of bioretention area is proposed for the Medlow Park basin downstream of CD4420. ● Accidental spill containment – dedicated diversion equipment for the storage of spills to avoid direct discharge to receiving watercourses.

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Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 23 Surface and Groundwater Impact Assessments

● Grassed swales – vegetated flow carrying infrastructure providing filtration of stormwater flows during low flow storm events through soil infiltration ● Level Spreader - at all discharge locations to the natural surface, level spreaders should be used to reduce velocity and depth of the flows reaching the natural watercourses.

Table 5.1: Mitigation Measures Impact Environmental Safeguard Responsibility Timing Increase in peak flow Develop storage basins at the two locations identified,: CD3370 and TfNSW Concept CD4420 Design Increase in pollutant Design for biofiltration basins and grassed swales for primary and TfNSW Concept loads from larger secondary treatment of the urban runoff prior to discharge. Design Design impervious surfaces standard of the water quality improvement is to the NorBE guidelines Scour potential Develop culvert/channel scour protection to the TfNSW standard TfNSW Detailed increases at discharge details ensuring suitability for velocity and peak flow protection Design locations

At the discharge of the drainage system downstream of CD3370, a new cross drainage culvert proposed as part of the concept design, a new detention basin is required to attenuate the peak flows to downstream and limit the discharge velocity. The position and shape of the basin is subject to the batter design of the upgrade works. The size of biofiltration bed within the basin is anticipated to be 2% of the contributing catchment area.

Figure 5.1: CD3370 Discharge Mitigation

Source: Medlow Bath Concept Design

At the discharge of the drainage system downstream of CD4420, a new cross drainage culvert is proposed as part of the concept design, a new detention basin is required to attenuate the peak flows to downstream and limit the discharge velocity. The position and shape of the basin is subject to coordination with the Medlow Park masterplan as well as consultation with Council and any applicable government agencies. The details of the discharge control structure of the basin based on culvert

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Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 24 Surface and Groundwater Impact Assessments

capacity once the blockage assessment of the GWH cross drainage design in confirmed in detailed design. The size of biofiltration bed within the basin is anticipated to be 2% of the contributing catchment area, and not less than 160m² to achieve the NorBE objectives for a beneficial outcome.

Figure 5.2: CD4220 Discharge Mitigation

Source: Medlow Bath Concept Design

To mitigate the potential impacts on groundwater during the operational phase,

● swales are to be vegetated where possible to maintain groundwater recharge rates. ● bioretention areas are to be unlined, encouraging groundwater recharge after treatment of the surface runoff which removes much of the pollutants ● spill containment measures and pollutant traps are to be inspected regularly as part of the maintenance program to ensure they remain functional and the adequacy of storage volumes for subsequent potential contaminants is maintained.

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Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 25 Surface and Groundwater Impact Assessments

6 Recommendations

These recommendations are based on the principles of not worsening the existing conditions for runoff and ground water quality. The recommendations in this report will contribute to achieving a beneficial outcome with regard to surface water quality as indicated by the NorBE assessment, and a negligible impact on groundwater due to the design alignment selection, no active use of groundwater; and the proximity of the site in relation to the location of the existing bores:

● Provide all runoff discharge locations with level spreaders for limits on the scour potential of runoff entering the existing watercourses ● Runoff discharge locations are proposed to have attenuation basins for mitigation of the discharge peak flows to no greater than under the existing conditions. Bioretention is proposed to be integrated into the basin floor to provide stormwater quality filtration and treatment. Minimum bioretention area is to be 160m², with a recommended 2% of catchment area to be provided to achieve a beneficial outcome. ● Scour protection to all overland flow routes comprising grass cover by default, and concrete lining channels for velocities greater than 2m/s. ● Consult with Council around the integration of attenuating basin to the Medlow Park masterplan area. The dimensions and depth to be developed in consultation with Council engineers to ensure safe operation of the infrastructure. ● Consult with the owner of groundwater bore near the boundary of the proposal area to understand the access and GW061451 quality requirements of the bore into the future and confirm no adverse impacts. ● During construction, monitor groundwater levels where potential impact in the form of damage to buildings from settlement, is possible as a result of shallow groundwater conditions prior construction.

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Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 26 Surface and Groundwater Impact Assessments

7 References

Australian Government 2013, Guidelines for groundwater quality protection in Australia: National Water Quality Management Strategy, Department of Agriculture and Water Resources, Canberra.

Ball J, Babister M, Nathan R, Weeks W, Weinmann E, Retallick M, Testoni I, (Editors), 2019, Australian Rainfall and Runoff: A Guide to Flood Estimation, Commonwealth of Australia

NSW Department of Infrastructure, Planning and Natural Resources, 2005, Floodplain Development Manual: the management of flood liable land, NSW Government, Sydney.

NSW Department of Primary Industries, 2012, NSW Aquifer Interference Policy: NSW Government policy for the licensing and assessment of aquifer interference activities.

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Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 27 Surface and Groundwater Impact Assessments

A. Catchment Mapping

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Medlow Bath

Review of Environmental Factors

Hydrological Catchment Layout Map

Legend

Spatial Data REF Assessment Catchments Study Area

OpenTopoMap Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 28 Surface and Groundwater Impact Assessments

B. Drainage Concept Design

419899 | 02 | B | May 2021

NEW DRIVEWAYS AND NEW TWO CARPORTS TO BE PROVIDED

DRIVEWAY WIDTH TO ALLOW FOR EP EP TURN OF 8.8m SU TRUCK VEHICLE SHARED VEHICLE/ PEDESTRIAN/ CYCLIST ZONE EXISTING HERITAGE WALL TO FROM KATOOMBA DRIVEWAY WIDTHS TO BE BE PROTECTED ADJUSTED WHEN SURVEY AVAILABLE

UNITED PETROL

OPENINGS THROUGH THE MEDIAN FOR HYDRO MAJESTIC

STATION FLOOD RISK MITIGATION

HOTEL LOCALLY NARROW CLEARANCE AT EXISTING DRIVEWAY TO

SHARED PATH, W= 0.5 m PC 4143.097 BE REMOVED PT 4234.955 PT

4160 4180

4140

4120 4200

4100

PT 3897.878

4080 4220 4060

4040

4020

4000 4240

3980

3960

3940

3920

3900

PC 3836.621

3880

3860

3840

3820 EP EP

MAINTAIN EXISTING TRACK NEW ROAD CONFIGURATION TO EP EP EP

EP ?P

EP EP 3800

EP EP

ACCOMMODATE TURNING AREA AND WH

EP EP

TJP

3780 EP

IN EP ?

WH GAT

EJB

GAT

CONSTRUCT RETAINING PROPERTY ACCESS WILL INCREASE WH 235U

EJB

EP 1052.575

1052.610

3760 WH

WH ?P

EP ?P

WH EP

IMPACT TO UTILITIES WH WALL FROM APPROX. IN

3740 EP WH

235U

1052.125

1052.213

CH 3575 TO CH 3710. 1052.247

1052.367

1050.568

3720 1050.924

PHOLE

1057.437

PHOLE EP

1051.881 1052.346

1049.585

1049.221

PHOLE

1051.458

1057.242

PHOLE

PHOLE PHOLE

1053.000

PHOLE

1052.944 1051.030

1050.227

1057.395

1057.203 PHOLE

PT 3671.040

PHOLE 1048.972 1049.621 PHOLE PHOLE 235U

PHOLE

3700 PHOLE

PHOLE PHOLE

1055.823 1057.246

1053.032

PHOLE

1051.486 1051.484 PHOLE

1052.846

1052.972 PHOLE

PHOLE

PHOLE PHOLE PHOLE

3680

235U

3660 6270370.259 N 6270370.259

248001.667 E WH N 6270469.504 235U

3640 6270330.639 N 6270330.639

247959.721 E

248022.446 E

6270429.884 N 6270429.884

6270291.019 N 6270291.019

235U

3620

247980.5 E

60 248043.225 E

RW EP

RW EP 235U

1051.828

3600 PHOLE

6270211.778 N 6270211.778

RW EP

PC 3573.772

248084.784 E

233

235U

6270172.158 N 6270172.158

3580 RW 12 TJP

207

248105.563 E TJP

233

12 WH

6270132.537 N 6270132.537

235U

248126.342 E CHANNEL CHANNEL 207 IRON

12 3560 233

207U

203U

CHANNEL IRON

OB CHANNEL IRON

235U 233 1056.596 12 WH 207 235U 207U

203U

3540 TRACK - UP DOWN

233

235U

207U

203U 207

TRACK - UP MAIN 4

233

3520

235U

207U >

203U 21128 > 21128 28211 28211 28 211 28 211 28 28

28 211 28 211 28 211 28 211 28 21128 21128 21128 21128 28211 211 211 28 211 28 21128 211 28 21128 28 > 28 211 28 211 21128 28 211 28 211 28 211 E 211 28211 28211 28 211

28 211 28> 211 28 21128

211 28 21128 >

E 211

PT 3494.874 233 211 28 28 21128

28 211 28 21128 21128 >28 211 28 211 > 21128 28 207 21128 28211 28211 211 E 21128 28211 28 21128 > 28 211 28 211 28 211 28 211 28 211 28 21128 28 211 28

28 211 28 211 211 28 211 28 211 28

28 211 211 > 211 > 28 28 E

21128 E 235U 21128

> 21128 > 6270033.68 N 6270033.68 21128 21128

4 21128 21128

21128235U 28211 207U > E 3500 4 203U 211

21128 28 211

4 E 28

> 211 28 21128

4 233 28 E

248188.292 E 211 > 21128 28

211 4

E 28

SIGNILISED INTERSECTION

211 >

E >

> 28 > E

211 > 6270509.9 N 6270509.9

28 > 211

235U

28 E >

211 28 > > E 211 12 28 > 80U 4

E 207U 203U

AT BELLEVUE CRES 21128 E >

> > 247978.95 E

4 21128 233 E

> >

4 >

> >

> 3480 28

211 E E CONSTRUCT RETAINING 21128 > E 28

211

> 21128

21128

235U 211 28 >

> 28 211 28

80U 211 211 28 >

28 E 233

28211 > 12 WALL FROM APPROX.

21128 21128 E

WH 21128

21128 > > 21128 >

E 211 28

> E 28 E28 211 211 CH3690 TO CH4420. 211 28 28

28 211 80U

211

3460 > 28 233

> 28211

> 28 28211 > 28 211 SL115+493 OHWS E 28 211 NEW STORMWATER PIPE IN ADDITION TO 21128 21128 211

211 28 12 211 28 N 6270252.174

28 211 28 >

> 28 211 E

211 28211 28

21128 SL115+431 OHWS

21128 AND PARALLEL WITH THE EXISTING CROSS 80U 28 211 > 248104.012 E OHWS SL115+545

211 28 28

211

E 28

211 OHWS SL115+573

211 28 28 > DRAINAGE 3440 21128 OHWS SL115+370 OHWS

> 211 28 28 211 E OHWS SL115+594

211

28 SL115+307 OHWS >

211

OHWS SL115+632

28 211

> 28211

E 211

3420 28

211

70 211 > 28 211 28 E

211 28

> 28 211

211 PIPE SIZING BASED ON PRELIMINARY

28 > OHWS SL115+246 OHWS

28 211

211

E 28

3400 211 6269915.207 N 6269915.207 28 >

28211 CALCULATIONS FOR PROPOSED

> 28

211

248270.634 E 28 E OHWS SL115+185 OHWS 211

28 CATCHMENT DRAINAGE TO CULVERT

> 28 211 28 211

28 211 28211 > N 6270113.696 BENEATH RAIL.

211 E 28

3380 28211 21128 > 248186.742 E

21128

> 21128

21128 PC 3360.505 E 28

28 211 > 211

211

28 211 > TIE INTO EXISTING GREAT WESTERN 28211

3360 E 28

211 >

211

28 207 207

211 207

HIGHWAY ALIGNMENT 28 207 207

211 207 207 207

OHWS SL115+121 OHWS

6269855.971 N 6269855.971 > 28 1055.464

E 211 28207 PHOLE 28207211 211

248311.805 E > 28207

28207211

28211207 >

28207211 1058.312 3340 PHOLE

21128 E 207

6270054.46 N 6270054.46

21120728 > 21120728

21120728 248227.913 E

1058.107

1058.425

> 28 PHOLE 211207 E PHOLE

28207211 N 6270014.839

> 20728211 20721128

PT 3311.099 28 248248.692 E 207211

28 > 3320 211207 SL115+057 OHWS

21120728 1056.591

PHOLE

6269836.354 N 6269836.354 E

1056.437 >

207 PHOLE

207

248332.197 E 21128

207

> 211 E

21128207 21120728 WATER QUALITY TREATMENT BASIN TO

> PC 3288.864 28211207 WH

3300 >

21128207 GAT TREAT RUNOFF FROM THE PROPOSED

21120728

> E 21120728 ROAD ALIGNMENT. PRELIMINARY

28 207211 3285 28 E > 207211

28 SL114+993 OHWS BIORETENTION AREA = 530 m² 207211 N 6269955.603 28

207211 > 28

207211 > 28 248289.863 E

28 207211

28211207 6269777.118 N 6269777.118 > E 21128207 21120728 248373.367 E 21120728 21120728 E > 21120728 28211207

28211207

> 21120728 27.60

21120728 >

211207 1057.443

1058.103

1058.493 27.60

1058.114 1057.448 PHOLE

PHOLE

207211 PHOLE PHOLE 28 PHOLE

207211 28 > E 28207211 28207211 20721128 var. (6.7 - 9.2) 21120728 E var. 2.50 1.50 3.35 3.35 1.80 3.30 3.35 3.35 2.50 0.60 4.50 1.50 3.35 3.35 1.80 3.30 3.35 3.35 2.50 0.60 > 21120728

21120728 4.50 1.50 3.35 3.35 5.10 3.35 3.35 2.50 0.60 4.50 3.30 3.35 20728 211

> 211207 28 OHWS SL114+929 OHWS

20721128 > THROUGH THROUGH RIGHT THROUGH THROUGH

20721128 THROUGH THROUGH RIGHT THROUGH THROUGH

6269717.881 N 6269717.881 28 LANDSCAPING SHARED ZONE 207211 1.00 2.50 1.00 > LEFT TURN 28 THROUGH E THROUGH THROUGH RAISED MEDIAN THROUGH THROUGH 207211 248414.538 E

207 LANE N/B LANE N/B TURN LANE S/B LANE S/B 1.00 2.50 1.00

21128 LANE N/B LANE N/B TURN LANE S/B LANE S/B 207 E WH 1.00 2.50 1.00 > 207 LANE N/B LANE N/B LANE S/B LANE S/B LANE AT LANE N/B 207 21128

207 VERGE SHARED

28 211 28 211 28 211 28 LANE S/B LANE S/B

>28207211 > SHARED

28211207 SHARED STATION ST 21120728 PATH N/B > SHOULDER E 28

211207 SHOULDER SHOULDER

28 VERGE

PATH VERGE 211207 0.50 0.50 SHOULDER

28 E SHOULDER PATH 207211

> VERGE

28 VERGE 207211 SL114+865 OHWS 28 VERGE 211 VERGE

> 28 207 SHOULDER 207211 RAISED MEDIAN 28 > RAISED MEDIAN BARRIER & WALL BARRIER & WALL

211207 > E 28 BARRIER & WALL 211207 0.50 28 0.50 211 0.50 0.50 > 28 207E 28 211207

> 21128 28 211 > 207

211 28 SHOULDER SHOULDER

28 207 E 211 > (LOCAL 28 207 28 211

28 211 207 SL114+801 OHWS > E 207 4 TRAFFIC GUTTER GUTTER

> ONLY) SA GUTTER SA GUTTER 2% 2% LONG VEHICLE LONG VEHICLE LONG VEHICLE 2% LONG VEHICLE LONG VEHICLE 3% 3% 2% LONG VEHICLE 3% 3% LONG VEHICLE 3% 3% LONG VEHICLE 3% 5% 5%

SF KERB HIGH PERFORMANCE REDIRECTIVE SF KERB SA Kerb & Gutter SA Kerb & Gutter SA Kerb & Gutter SA Kerb & Gutter KERB (HPRK) AT LANDSCAPED MEDIAN

1060.663 MEDLOW BATH MEDLOW BATH MEDLOW BATH MEDLOW BATH TYPICAL CROSS SECTION - BELLEVUE CRESCENT TYPICAL CROSS SECTION - WIDE MEDIAN MID-BLOCK TYPICAL CROSS SECTION - RIGHT TURN LANE TYPICAL CROSS SECTION - NARROW MEDIAN 3713.458 INTERSECTION NORTHERN APPROACH CHAINAGE 4000 CHAINAGE 4380

1058.451 INTO HYDRO MAJESTIC PROPERTY CHAINAGE 3800 SCALE: NTS CHAINAGE 4060 SCALE: NTS

3424.689 SCALE NTS

1056.571 SCALE: NTS

1055.126 3826.828

1054.598

3370.000 1055.639

3856.829 1055.488 1053.771 3886.829 1053.528

3930.498

1052.994 3952.868 1054.327 1052.662

3975.238 3984.996

4002.883 1053.083 4020.770 4087.158 1051.001

4128.877 1052.453 1050.940

1050.382

4170.597

4172.357

4262.394

4217.376 1049.373

RL 1045.000

R=3300.000 R=2500.000 R=3500.000 R=1800.000 R=2800.000 R=1574.002 VERTICAL P=5.14% P=-3.61% P=-1.21% P=-2.49% P=-0.50% P=-3.48% P=2.24% L=288.769 L=60.000 L=44.739 L=35.775 L=83.439 L=90.038 L=54.689 L=113.370 L=43.670 L=9.758 L=66.388 L=1.760 L=63.308 GEOMETRY K=33.000 K=25.000 K=35.000 K=18.000 K=28.000 K=15.740

D=78.898 D=165.581 D=245.219 D=60.228 HORIZONTAL L=134.369 L=97.268 L=61.256 L=91.858 L=52.8

GEOMETRY R=2711.400 R=700.000 R=700.000 R=1000.000 R=600.00 3.00% 3.00% 3.00%

SUPERELEVATION -2.89% -3.00% -3.00% -3.00%

DESIGN LEVELS 1057.181 1058.451 1060.831 1062.781 1061.921 1061.701 1061.121 1058.261 1056.571 1053.771 1051.001 1050.221 1055.639 1056.153 1058.210 1059.202 1060.077 1061.313 1061.463 1061.975 1062.365 1062.633 1062.715 1062.748 1062.807 1062.713 1062.497 1062.159 1060.663 1060.427 1059.705 1058.983 1057.539 1056.818 1056.237 1056.130 1055.668 1055.594 1055.218 1055.126 1054.992 1054.966 1054.725 1054.598 1054.470 1054.256 1054.116 1053.652 1053.528 1053.217 1053.172 1052.998 1052.994 1052.897 1052.797 1052.697 1052.662 1052.568 1052.305 1052.142 1051.899 1051.823 1051.350 1050.940 1050.693 1050.017 1050.003 1050.006 1050.039 1050.330 1050.382 1050.776 1051.116 1051.224 105

EXISTING LEVELS 1058.751 1058.091 1054.501 1053.531 1052.911 1055.639 1056.145 1057.106 1058.082 1058.310 1059.023 1059.873 1060.586 1061.045 1061.188 1061.699 1062.144 1062.418 1062.515 1062.555 1062.595 1062.665 1062.597 1062.393 1062.062 1061.812 1061.570 1060.954 1060.497 1060.265 1059.494 1057.476 1056.900 1056.728 1056.479 1056.389 1055.978 1055.894 1055.444 1055.322 1055.138 1055.108 1054.790 1054.624 1054.308 1054.188 1053.947 1053.872 1053.783 1053.488 1053.222 1053.213 1053.039 1052.722 1052.630 1052.462 1052.180 1052.042 1051.840 1051.777 1051.404 1051.144 1051.102 1050.926 1050.528 1050.334 1050.314 1050.263 1050.277 1050.442 1050.470 1050.715 1051.030 1051.135 105

STATION 3836.621 4000.000 4002.883 4020.000 4020.770 4040.000 4060.000 4080.000 4087.158 4100.000 4120.000 4128.877 4140.000 4143.097 4160.000 4170.597 4172.357 4180.000 4200.000 4217.376 4220.000 4234.955 4240.000 4260.000 4262.394 4280.000 4295.183 4300.000 432 3370.000 3380.000 3400.000 3420.000 3424.689 3440.000 3460.000 3480.000 3494.874 3500.000 3520.000 3540.000 3560.000 3569.074 3573.772 3580.000 3600.000 3620.000 3640.000 3660.000 3671.040 3680.000 3700.000 3713.458 3720.000 3740.000 3760.000 3780.000 3800.000 3820.000 3826.828 3840.000 3856.829 3860.000 3880.000 3886.829 3897.878 3900.000 3920.000 3930.498 3940.000 3952.868 3960.000 3975.238 3980.000 3984.996

LONGITUDINAL SECTION - MC001

HW5 GREAT WESTERN HIGHWAY - MEDLOW BATH

LONGITUDINAL SECTION - MEDLOW BATH - CONTROL LINE MCM0 HORIZ SCALE = 1:500 VERT SCALE = 1:100 Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 29 Surface and Groundwater Impact Assessments

C. NorBE Assessment Summary

419899 | 02 | B | May 2021

Neutral or Beneficial Effect Assessment State Environmental Planning Policy (Sydney Drinking Water Catchment) 2011 relates to the use of land within the Sydney drinking water catchment. In accordance with Clause 12 of the SEPP, Roads and Maritime is required to consider whether or not an activity to which Division 5.1 of the EP&A Act applies will have a neutral or beneficial effect on water quality before carrying out the activity.

Factor Impact 1. Are there any identifiable Identified potential pollutants are sediments (fine and coarse), nitrogen, potential impacts on water phosphorus, pathogens, hazardous chemicals and contaminants such quality? as oil/fuel.

What pollutants are likely? These pollutants are not new to the catchment as there is no new landuse proposed as part of the project. However the project increases During construction and/or post the generation of these pollutants as widening facilitates more traffic construction? movements through the area, and increased pavement areas reduce the pervious portions of the catchment which provide treatment for runoff and filtration of the pollutants.

Specific water quality pollutant generation during construction result from the disturbance of soil in demolition and excavation, stockpiling and sedimentation from unfinished surfaces. 2. For each pollutant, list the Safeguards, or water quality protection measures, that need to be in safeguards needed to prevent place during the construction. or mitigate potential impacts on • Perimeter sedimentation control (fence) and swale drains/bunds water quality (these may be • Stabilised construction access including shaker pads Water NSW endorsed current • Wash down facilities for trucks and plant recommended practices and/or • Sedimentation basin equally effective other • Spill control/oil separator at discharge locations practices) Safeguards, or water quality protection measures, that need to be in place during operational stages of the project.

• Bioretention basin to Council specification • Gross pollutant trap • Stormwater attenuation 3. Will the safeguards be The Construction Environmental Management Plan (CEMP) will include adequate for the time required? the regular maintenance of the construction stage water quality How will they need to be improvement measures including roles and responsibilities for maintained? monitoring the quality and effectiveness of the measures at each stage of the construction. This includes regular inspection and cleanout of the mitigation measures which will capture varying loads of pollutants at stages of construction dependent on the current activities on-site.

Operational phases of the project will include maintenance regimes to the stormwater reticulation network, gross pollutant trap and bioretention/stormwater attenuation facilities. This includes the management of vegetation, removal of pollutant loads and system blockages, and replacement of any filtration media to a maintenance program dependent on the size and specification of the measures selected during detailed design stages.

GWH Medlow Bath Review of Environmental Factors Version 1.0 Factor Impact 4. Will all impacts on water The project drains to controlled areas for water quality and as such quality be effectively contained MUSIC modelling has been undertaken to determine the impacts and on the site by the identified treatment required to achieve no worsening of pollutants in discharge safeguards (above) and not water reaching the receiving environment. reach any watercourse, waterbody or drainage The impacts on water quality of the project will be managed on-site depression? through collection of runoff, reticulation to the gross pollutant trap and subsequent discharge to the bio-retention basin. Bioretention to be Or will impacts on water quality collocated with the stormwater attenuation basin such that runoff peak be transferred outside the site volumes are not increased as a result of the project. for treatment? How? Why? 5. Is it likely that a neutral or When the activity has been completed, the level of pollutants will be beneficial effect on water lower than before construction. Current water quality improvement quality will occur? Why? measures for the discharge of stormwater are minimal and mainly comprise treatment through informal measures such as overland flows routed through vegetation providing filtration through infiltration. The post developed treatment measures will remove gross pollutants and further reduce residual pollutants through biofiltration prior to discharge.

May 2021

GWH Medlow Bath Review of Environmental Factors Version 1.0 Mott MacDonald | Great Western Highway Upgrade - Medlow Bath 30 Surface and Groundwater Impact Assessments

D. Protected Matters Report

419899 | 02 | B | May 2021

Summary

Matters of National Environment Significance

This part of the report summarises the matters of national environmental significance that may occur in, or may relate to, the area you nominated. Further information is available in the detail part of the report, which can be accessed by scrolling or following the links below. If you are proposing to undertake an activity that may have a significant impact on one or more matters of national environmental significance then you should consider the Administrative Guidelines on Significance - see http://environment.gov.au/protection/environment-assessments

World Heritage Properties: 1 National Heritage Places: 1 Wetlands of International Significance: None Great Barrier Reef Marine Park: None Commonwealth Marine Area: None Threatened Ecological Communities: 12 Threatened Species: 84 Migratory Species: 16

Other Matters Protected by the EPBC Act

This part of the report summarises other matters protected under the Act that may relate to the area you nominated. Approval may be required for a proposed activity that significantly affects the environment on Commonwealth land, when the action is outside the Commonwealth land, or the environment anywhere when the action is taken on Commonwealth land. Approval may also be required for the Commonwealth or Commonwealth agencies proposing to take an action that is likely to have a significant impact on the environment anywhere.

The EPBC Act protects the environment on Commonwealth land, the environment from the actions taken on Commonwealth land, and the environment from actions taken by Commonwealth agencies. As heritage values of a place are part of the 'environment', these aspects of the EPBC Act protect the Commonwealth Heritage values of a Commonwealth Heritage place. Information on the new heritage laws can be found at http://www.environment.gov.au/heritage

A permit may be required for activities in or on a Commonwealth area that may affect a member of a listed threatened species or ecological community, a member of a listed migratory species, whales and other cetaceans, or a member of a listed marine species. Information on EPBC Act permit requirements and application forms can be found at http://www.environment.gov.au/epbc/permits-and-application-forms

Commonwealth Lands: 8 Commonwealth Heritage Places: None Listed Marine Species: 21 Whales and Other Cetaceans: None Critical Habitats: None Commonwealth Reserves Terrestrial: None Australian Marine Parks: None

Extra Information

This part of the report provides information that may also be relevant to the area you have nominated.

State and Territory Reserves: 4 Regional Forest Agreements: None Invasive Species: 54 Nationally Important Wetlands: 1 Details

Matters of National Environmental Significance World Heritage Properties [ Resource Information ] Name State Status Greater Blue Mountains Area NSW Declared property

National Heritage Properties [ Resource Information ] Name State Status Natural The Greater Blue Mountains Area NSW Listed place

Threatened Ecological Communities [ Resource Information ] For threatened ecological communities where the distribution is well known, maps are derived from recovery plans, State vegetation maps, remote sensing imagery and other sources. Where threatened ecological community distributions are less well known, existing vegetation maps and point location data are used to produce indicative distribution maps. Name Status Type of Presence Castlereagh Scribbly Gum and Agnes Banks Endangered Community may occur Woodlands of the Sydney Basin Bioregion within area Coastal Swamp Oak (Casuarina glauca) Forest of New Endangered Community may occur South Wales and South East Queensland ecological within area community Cooks River/Castlereagh Ironbark Forest of the Critically Endangered Community may occur Sydney Basin Bioregion within area Cumberland Plain Shale Woodlands and Shale-Gravel Critically Endangered Community likely to occur Transition Forest within area Natural Temperate Grassland of the South Eastern Critically Endangered Community may occur Highlands within area River-flat eucalypt forest on coastal floodplains of Critically Endangered Community likely to occur southern New South Wales and eastern Victoria within area Shale Sandstone Transition Forest of the Sydney Critically Endangered Community likely to occur Basin Bioregion within area Temperate Highland Peat Swamps on Sandstone Endangered Community known to occur within area Turpentine-Ironbark Forest of the Sydney Basin Critically Endangered Community likely to occur Bioregion within area Upland Basalt Eucalypt Forests of the Sydney Basin Endangered Community likely to occur Bioregion within area Western Sydney Dry Rainforest and Moist Woodland Critically Endangered Community may occur on Shale within area White Box-Yellow Box-Blakely's Red Gum Grassy Critically Endangered Community likely to occur Woodland and Derived Native Grassland within area Threatened Species [ Resource Information ] Name Status Type of Presence BIRDS Anthochaera phrygia Regent Honeyeater [82338] Critically Endangered Species or species habitat known to occur within area

Botaurus poiciloptilus Australasian Bittern [1001] Endangered Species or species habitat known to occur within area

Calidris ferruginea Curlew Sandpiper [856] Critically Endangered Species or species habitat may occur within area

Falco hypoleucos Grey Falcon [929] Vulnerable Species or species habitat likely to occur within area

Grantiella picta Painted Honeyeater [470] Vulnerable Species or species Name Status Type of Presence habitat known to occur within area Hirundapus caudacutus White-throated Needletail [682] Vulnerable Species or species habitat known to occur within area

Lathamus discolor Swift Parrot [744] Critically Endangered Species or species habitat known to occur within area

Numenius madagascariensis Eastern Curlew, Far Eastern Curlew [847] Critically Endangered Species or species habitat may occur within area

Rostratula australis Australian Painted Snipe [77037] Endangered Species or species habitat likely to occur within area

FISH Macquaria australasica Macquarie Perch [66632] Endangered Species or species habitat known to occur within area

Prototroctes maraena Australian Grayling [26179] Vulnerable Species or species habitat likely to occur within area

FROGS Heleioporus australiacus Giant Burrowing Frog [1973] Vulnerable Species or species habitat known to occur within area

Litoria aurea Green and Golden Bell Frog [1870] Vulnerable Species or species habitat likely to occur within area

Litoria booroolongensis Booroolong Frog [1844] Endangered Species or species habitat likely to occur within area

Litoria littlejohni Littlejohn's Tree Frog, Heath Frog [64733] Vulnerable Species or species habitat known to occur within area

Mixophyes balbus Stuttering Frog, Southern Barred Frog (in Victoria) Vulnerable Species or species habitat [1942] known to occur within area

INSECTS Paralucia spinifera Bathurst Copper Butterfly, Purple Copper Butterfly, Vulnerable Species or species habitat Bathurst Copper, Bathurst Copper Wing, Bathurst- may occur within area Lithgow Copper, Purple Copper [26335] MAMMALS Chalinolobus dwyeri Large-eared Pied Bat, Large Pied Bat [183] Vulnerable Species or species habitat known to occur within area

Dasyurus maculatus maculatus (SE mainland population) Spot-tailed Quoll, Spotted-tail Quoll, Tiger Quoll Endangered Species or species habitat (southeastern mainland population) [75184] known to occur within area

Isoodon obesulus obesulus Southern Brown Bandicoot (eastern), Southern Brown Endangered Species or species habitat Bandicoot (south-eastern) [68050] known to occur within area

Petauroides volans Greater Glider [254] Vulnerable Species or species habitat known to occur within area

Petrogale penicillata Brush-tailed Rock-wallaby [225] Vulnerable Species or species habitat known to occur within area Name Status Type of Presence Phascolarctos cinereus (combined populations of Qld, NSW and the ACT) Koala (combined populations of Queensland, New Vulnerable Species or species habitat South Wales and the Australian Capital Territory) known to occur within area [85104] Pseudomys novaehollandiae New Holland Mouse, Pookila [96] Vulnerable Species or species habitat likely to occur within area

Pteropus poliocephalus Grey-headed Flying-fox [186] Vulnerable Foraging, feeding or related behaviour known to occur within area OTHER Pommerhelix duralensis Dural Land Snail [85268] Endangered Species or species habitat known to occur within area

PLANTS Acacia bynoeana Bynoe's Wattle, Tiny Wattle [8575] Vulnerable Species or species habitat known to occur within area

Acacia flocktoniae Flockton Wattle [3134] Vulnerable Species or species habitat known to occur within area

Acacia gordonii [5031] Endangered Species or species habitat known to occur within area

Acacia pubescens Downy Wattle, Hairy Stemmed Wattle [18800] Vulnerable Species or species habitat known to occur within area

Acrophyllum australe [3983] Vulnerable Species or species habitat known to occur within area

Allocasuarina glareicola [21932] Endangered Species or species habitat likely to occur within area

Astrotricha crassifolia Thick-leaf Star-hair [10352] Vulnerable Species or species habitat known to occur within area

Boronia deanei Deane's Boronia [8397] Vulnerable Species or species habitat likely to occur within area

Callistemon megalongensis Megalong Valley Bottlebrush [85098] Critically Endangered Species or species habitat known to occur within area

Callistemon purpurascens a bottlebrush [88226] Critically Endangered Species or species habitat known to occur within area

Cryptostylis hunteriana Leafless Tongue-orchid [19533] Vulnerable Species or species habitat likely to occur within area

Cynanchum elegans White-flowered Wax Plant [12533] Endangered Species or species habitat likely to occur within area

Epacris hamiltonii [8700] Endangered Species or species habitat known to occur within area

Epacris sparsa [16450] Vulnerable Species or species habitat known to occur within area Name Status Type of Presence Eucalyptus aggregata Black Gum [20890] Vulnerable Species or species habitat likely to occur within area

Eucalyptus benthamii Camden White Gum, Nepean River Gum [2821] Vulnerable Species or species habitat known to occur within area

Eucalyptus copulans [56225] Endangered Species or species habitat known to occur within area

Eucalyptus macarthurii Camden Woollybutt, Paddys River Box [7827] Endangered Species or species habitat likely to occur within area

Eucalyptus pulverulenta Silver-leaved Mountain Gum, Silver-leaved Gum Vulnerable Species or species habitat [21537] likely to occur within area

Euphrasia arguta [4325] Critically Endangered Species or species habitat may occur within area

Euphrasia bowdeniae [21521] Vulnerable Species or species habitat known to occur within area

Genoplesium baueri Yellow Gnat-orchid, Bauer's Midge Orchid, Brittle Endangered Species or species habitat Midge Orchid [7528] may occur within area

Haloragis exalata subsp. exalata Wingless Raspwort, Square Raspwort [24636] Vulnerable Species or species habitat may occur within area

Haloragodendron lucasii Hal [6480] Endangered Species or species habitat known to occur within area

Homoranthus darwinioides [12974] Vulnerable Species or species habitat likely to occur within area

Isopogon fletcheri Fletcher's Drumsticks [19980] Vulnerable Species or species habitat known to occur within area

Kunzea cambagei [11420] Vulnerable Species or species habitat known to occur within area

Leionema lachnaeoides [64924] Endangered Species or species habitat known to occur within area

Leucopogon exolasius Woronora Beard-heath [14251] Vulnerable Species or species habitat may occur within area

Melaleuca deanei Deane's Melaleuca [5818] Vulnerable Species or species habitat known to occur within area

Micromyrtus minutiflora [11485] Vulnerable Species or species habitat likely to occur within area

Olearia cordata [6710] Vulnerable Species or species habitat may occur within area

Persicaria elatior Knotweed, Tall Knotweed [5831] Vulnerable Species or species Name Status Type of Presence habitat may occur within area Persoonia acerosa Needle Geebung [7232] Vulnerable Species or species habitat likely to occur within area

Persoonia hirsuta Hairy Geebung, Hairy Persoonia [19006] Endangered Species or species habitat known to occur within area

Persoonia nutans Nodding Geebung [18119] Endangered Species or species habitat likely to occur within area

Pherosphaera fitzgeraldii Dwarf Mountain Pine [40324] Endangered Species or species habitat known to occur within area

Pimelea curviflora var. curviflora [4182] Vulnerable Species or species habitat may occur within area

Pimelea spicata Spiked Rice-flower [20834] Endangered Species or species habitat may occur within area

Pomaderris brunnea Rufous Pomaderris, Brown Pomaderris [16845] Vulnerable Species or species habitat may occur within area

Pomaderris cotoneaster Cotoneaster Pomaderris [2043] Endangered Species or species habitat likely to occur within area

Prasophyllum fuscum Tawny Leek-orchid, Slaty Leek-orchid [19455] Vulnerable Species or species habitat known to occur within area

Pterostylis saxicola Sydney Plains Greenhood [64537] Endangered Species or species habitat may occur within area

Pultenaea glabra Smooth Bush-pea, Swamp Bush-pea [11887] Vulnerable Species or species habitat known to occur within area

Rhizanthella slateri Eastern Underground Orchid [11768] Endangered Species or species habitat known to occur within area

Rhodamnia rubescens Scrub Turpentine, Brown Malletwood [15763] Critically Endangered Species or species habitat likely to occur within area

Syzygium paniculatum Magenta Lilly Pilly, Magenta Cherry, Daguba, Scrub Vulnerable Species or species habitat Cherry, Creek Lilly Pilly, Brush Cherry [20307] may occur within area

Thelymitra kangaloonica Kangaloon Sun Orchid [81861] Critically Endangered Species or species habitat may occur within area

Thesium australe Austral Toadflax, Toadflax [15202] Vulnerable Species or species habitat likely to occur within area

Velleia perfoliata [17190] Vulnerable Species or species habitat may occur within area

Wollemia nobilis Wollemi Pine [64545] Critically Endangered Species or species habitat likely to occur within area Name Status Type of Presence Xerochrysum palustre Swamp Everlasting, Swamp Paper Daisy [76215] Vulnerable Species or species habitat likely to occur within area

Zieria covenyi Coveny's Zieria [56732] Endangered Species or species habitat known to occur within area

Zieria involucrata [3087] Vulnerable Species or species habitat known to occur within area

Zieria murphyi Velvet Zieria [4634] Vulnerable Species or species habitat known to occur within area

REPTILES Aprasia parapulchella Pink-tailed Worm-lizard, Pink-tailed Legless Lizard Vulnerable Species or species habitat [1665] may occur within area

Eulamprus leuraensis Blue Mountains Water Skink [59199] Endangered Species or species habitat known to occur within area

Hoplocephalus bungaroides Broad-headed Snake [1182] Vulnerable Species or species habitat known to occur within area

Migratory Species [ Resource Information ] * Species is listed under a different scientific name on the EPBC Act - Threatened Species list. Name Threatened Type of Presence Migratory Marine Birds Apus pacificus Fork-tailed Swift [678] Species or species habitat likely to occur within area

Migratory Terrestrial Species Cuculus optatus Oriental Cuckoo, Horsfield's Cuckoo [86651] Species or species habitat may occur within area

Hirundapus caudacutus White-throated Needletail [682] Vulnerable Species or species habitat known to occur within area

Monarcha melanopsis Black-faced Monarch [609] Species or species habitat known to occur within area

Monarcha trivirgatus Spectacled Monarch [610] Species or species habitat may occur within area

Motacilla flava Yellow Wagtail [644] Species or species habitat likely to occur within area

Myiagra cyanoleuca Satin Flycatcher [612] Species or species habitat known to occur within area

Rhipidura rufifrons Rufous Fantail [592] Species or species habitat known to occur within area

Migratory Wetlands Species Actitis hypoleucos Common Sandpiper [59309] Species or species habitat may occur within area

Calidris acuminata Sharp-tailed Sandpiper [874] Species or species Name Threatened Type of Presence habitat likely to occur within area Calidris ferruginea Curlew Sandpiper [856] Critically Endangered Species or species habitat may occur within area

Calidris melanotos Pectoral Sandpiper [858] Species or species habitat may occur within area

Gallinago hardwickii Latham's Snipe, Japanese Snipe [863] Species or species habitat likely to occur within area

Numenius madagascariensis Eastern Curlew, Far Eastern Curlew [847] Critically Endangered Species or species habitat may occur within area

Pandion haliaetus Osprey [952] Species or species habitat known to occur within area

Tringa nebularia Common Greenshank, Greenshank [832] Species or species habitat may occur within area

Other Matters Protected by the EPBC Act Commonwealth Lands [ Resource Information ] The Commonwealth area listed below may indicate the presence of Commonwealth land in this vicinity. Due to the unreliability of the data source, all proposals should be checked as to whether it impacts on a Commonwealth area, before making a definitive decision. Contact the State or Territory government land department for further information. Name Commonwealth Land - Commonwealth Land - Airservices Australia Commonwealth Land - Australian Postal Commission Commonwealth Land - Australian Telecommunications Commission Commonwealth Land - Australian Telecommunications Corporation Commonwealth Land - Commonwealth Bank of Australia Commonwealth Land - Defence Housing Authority Defence - AIR HEADQUARTERS AUSTRALIA - GLENBROOK

Listed Marine Species [ Resource Information ] * Species is listed under a different scientific name on the EPBC Act - Threatened Species list. Name Threatened Type of Presence Birds Actitis hypoleucos Common Sandpiper [59309] Species or species habitat may occur within area

Apus pacificus Fork-tailed Swift [678] Species or species habitat likely to occur within area

Ardea ibis Cattle Egret [59542] Species or species habitat may occur within area

Calidris acuminata Sharp-tailed Sandpiper [874] Species or species habitat likely to occur within area

Calidris ferruginea Curlew Sandpiper [856] Critically Endangered Species or species habitat may occur within area

Calidris melanotos Pectoral Sandpiper [858] Species or species Name Threatened Type of Presence habitat may occur within area Chrysococcyx osculans Black-eared Cuckoo [705] Species or species habitat known to occur within area

Gallinago hardwickii Latham's Snipe, Japanese Snipe [863] Species or species habitat likely to occur within area

Haliaeetus leucogaster White-bellied Sea-Eagle [943] Species or species habitat known to occur within area

Hirundapus caudacutus White-throated Needletail [682] Vulnerable Species or species habitat known to occur within area

Lathamus discolor Swift Parrot [744] Critically Endangered Species or species habitat known to occur within area

Merops ornatus Rainbow Bee-eater [670] Species or species habitat may occur within area

Monarcha melanopsis Black-faced Monarch [609] Species or species habitat known to occur within area

Monarcha trivirgatus Spectacled Monarch [610] Species or species habitat may occur within area

Motacilla flava Yellow Wagtail [644] Species or species habitat likely to occur within area

Myiagra cyanoleuca Satin Flycatcher [612] Species or species habitat known to occur within area

Numenius madagascariensis Eastern Curlew, Far Eastern Curlew [847] Critically Endangered Species or species habitat may occur within area

Pandion haliaetus Osprey [952] Species or species habitat known to occur within area

Rhipidura rufifrons Rufous Fantail [592] Species or species habitat known to occur within area

Rostratula benghalensis (sensu lato) Painted Snipe [889] Endangered* Species or species habitat likely to occur within area

Tringa nebularia Common Greenshank, Greenshank [832] Species or species habitat may occur within area Extra Information State and Territory Reserves [ Resource Information ] Name State Blue Mountains NSW Ngula Bulgarabang NSW Wollemi NSW Yellomundee NSW

Invasive Species [ Resource Information ] Weeds reported here are the 20 species of national significance (WoNS), along with other introduced plants that are considered by the States and Territories to pose a particularly significant threat to biodiversity. The following feral animals are reported: Goat, Red Fox, Cat, Rabbit, Pig, Water Buffalo and Cane Toad. Maps from Landscape Health Project, National Land and Water Resouces Audit, Name Status Type of Presence Birds Acridotheres tristis Common Myna, Indian Myna [387] Species or species habitat likely to occur within area

Alauda arvensis Skylark [656] Species or species habitat likely to occur within area

Anas platyrhynchos Mallard [974] Species or species habitat likely to occur within area

Carduelis carduelis European Goldfinch [403] Species or species habitat likely to occur within area

Carduelis chloris European Greenfinch [404] Species or species habitat likely to occur within area

Columba livia Rock Pigeon, Rock Dove, Domestic Pigeon [803] Species or species habitat likely to occur within area

Lonchura punctulata Nutmeg Mannikin [399] Species or species habitat likely to occur within area

Passer domesticus House Sparrow [405] Species or species habitat likely to occur within area

Passer montanus Eurasian Tree Sparrow [406] Species or species habitat likely to occur within area

Pycnonotus jocosus Red-whiskered Bulbul [631] Species or species habitat likely to occur within area

Streptopelia chinensis Spotted Turtle-Dove [780] Species or species habitat likely to occur within area

Sturnus vulgaris Common Starling [389] Species or species habitat likely to occur within area

Turdus merula Common Blackbird, Eurasian Blackbird [596] Species or species habitat likely to occur within area

Frogs Rhinella marina Cane Toad [83218] Species or species Name Status Type of Presence habitat likely to occur within area Mammals Bos taurus Domestic Cattle [16] Species or species habitat likely to occur within area

Canis lupus familiaris Domestic Dog [82654] Species or species habitat likely to occur within area

Capra hircus Goat [2] Species or species habitat likely to occur within area

Equus caballus Horse [5] Species or species habitat likely to occur within area

Felis catus Cat, House Cat, Domestic Cat [19] Species or species habitat likely to occur within area

Feral deer Feral deer species in Australia [85733] Species or species habitat likely to occur within area

Lepus capensis Brown Hare [127] Species or species habitat likely to occur within area

Mus musculus House Mouse [120] Species or species habitat likely to occur within area

Oryctolagus cuniculus Rabbit, European Rabbit [128] Species or species habitat likely to occur within area

Rattus norvegicus Brown Rat, Norway Rat [83] Species or species habitat likely to occur within area

Rattus rattus Black Rat, Ship Rat [84] Species or species habitat likely to occur within area

Sus scrofa Pig [6] Species or species habitat likely to occur within area

Vulpes vulpes Red Fox, Fox [18] Species or species habitat likely to occur within area

Plants Alternanthera philoxeroides Alligator Weed [11620] Species or species habitat likely to occur within area

Anredera cordifolia Madeira Vine, Jalap, Lamb's-tail, Mignonette Vine, Species or species habitat Anredera, Gulf Madeiravine, Heartleaf Madeiravine, likely to occur within area Potato Vine [2643] Asparagus aethiopicus Asparagus Fern, Ground Asparagus, Basket Fern, Species or species habitat Sprengi's Fern, Bushy Asparagus, Emerald Asparagus likely to occur within area [62425] Asparagus asparagoides Bridal Creeper, Bridal Veil Creeper, Smilax, Florist's Species or species habitat Smilax, Smilax Asparagus [22473] likely to occur within area

Asparagus plumosus Climbing Asparagus-fern [48993] Species or species Name Status Type of Presence habitat likely to occur within area Cabomba caroliniana Cabomba, Fanwort, Carolina Watershield, Fish Grass, Species or species habitat Washington Grass, Watershield, Carolina Fanwort, likely to occur within area Common Cabomba [5171] Chrysanthemoides monilifera Bitou Bush, Boneseed [18983] Species or species habitat may occur within area

Chrysanthemoides monilifera subsp. monilifera Boneseed [16905] Species or species habitat likely to occur within area

Cytisus scoparius Broom, English Broom, Scotch Broom, Common Species or species habitat Broom, Scottish Broom, Spanish Broom [5934] likely to occur within area

Dolichandra unguis-cati Cat's Claw Vine, Yellow Trumpet Vine, Cat's Claw Species or species habitat Creeper, Funnel Creeper [85119] likely to occur within area

Eichhornia crassipes Water Hyacinth, Water Orchid, Nile Lily [13466] Species or species habitat likely to occur within area

Genista linifolia Flax-leaved Broom, Mediterranean Broom, Flax Broom Species or species habitat [2800] likely to occur within area

Genista monspessulana Montpellier Broom, Cape Broom, Canary Broom, Species or species habitat Common Broom, French Broom, Soft Broom [20126] likely to occur within area

Genista sp. X Genista monspessulana Broom [67538] Species or species habitat may occur within area

Lantana camara Lantana, Common Lantana, Kamara Lantana, Large- Species or species habitat leaf Lantana, Pink Flowered Lantana, Red Flowered likely to occur within area Lantana, Red-Flowered Sage, White Sage, Wild Sage [10892] Lycium ferocissimum African Boxthorn, Boxthorn [19235] Species or species habitat likely to occur within area

Nassella neesiana Chilean Needle grass [67699] Species or species habitat likely to occur within area

Nassella trichotoma Serrated Tussock, Yass River Tussock, Yass Tussock, Species or species habitat Nassella Tussock (NZ) [18884] likely to occur within area

Opuntia spp. Prickly Pears [82753] Species or species habitat likely to occur within area

Pinus radiata Radiata Pine Monterey Pine, Insignis Pine, Wilding Species or species habitat Pine [20780] may occur within area

Rubus fruticosus aggregate Blackberry, European Blackberry [68406] Species or species habitat likely to occur within area

Sagittaria platyphylla Delta Arrowhead, Arrowhead, Slender Arrowhead Species or species habitat [68483] likely to occur within area

Salix spp. except S.babylonica, S.x calodendron & S.x reichardtii Willows except Weeping Willow, Pussy Willow and Species or species habitat Sterile Pussy Willow [68497] likely to occur Name Status Type of Presence within area Salvinia molesta Salvinia, Giant Salvinia, Aquarium Watermoss, Kariba Species or species habitat Weed [13665] likely to occur within area

Senecio madagascariensis Fireweed, Madagascar Ragwort, Madagascar Species or species habitat Groundsel [2624] likely to occur within area

Ulex europaeus Gorse, Furze [7693] Species or species habitat likely to occur within area

Reptiles Hemidactylus frenatus Asian House Gecko [1708] Species or species habitat likely to occur within area

Nationally Important Wetlands [ Resource Information ] Name State Blue Mountains Sedge Swamps NSW Caveat The information presented in this report has been provided by a range of data sources as acknowledged at the end of the report.

This report is designed to assist in identifying the locations of places which may be relevant in determining oigations under the Environment Protection and Biodiversity Conservation Act 1999. It holds mapped locations of World and National Heritage properties, Wetlands of International and National Importance, Commonwealth and State/Territory reserves, listed threatened, migratory and marine species and listed threatened ecological communities. Mapping of Commonwealth land is not complete at this stage. Maps have been collated from a range of sources at various resolutions.

Not all species listed under the EPBC Act have been mapped (see below) and therefore a report is a general guide only. Where available data supports mapping, the type of presence that can be determined from the data is indicated in general terms. People using this information in making a referral may need to consider the qualifications below and may need to seek and consider other information sources.

For threatened ecological communities where the distribution is well known, maps are derived from recovery plans, State vegetation maps, remote sensing imagery and other sources. Where threatened ecological community distributions are less well known, existing vegetation maps and point location data are used to produce indicative distribution maps.

Threatened, migratory and marine species distributions have been derived through a variety of methods. Where distributions are well known and if time permits, maps are derived using either thematic spatial data (i.e. vegetation, soils, geology, elevation, aspect, terrain, etc) together with point locations and described habitat; or environmental modelling (MAXENT or BIOCLIM habitat modelling) using point locations and environmental data layers.

Where very little information is available for species or large number of maps are required in a short time-frame, maps are derived either from 0.04 or 0.02 decimal degree cells; by an automated process using polygon capture techniques (static two kilometre grid cells, alpha-hull and convex hull); or captured manually or by using topographic features (national park boundaries, islands, etc). In the early stages of the distribution mapping process (1999-early 2000s) distributions were defined by degree blocks, 100K or 250K map sheets to rapidly create distribution maps. More reliable distribution mapping methods are used to update these distributions as time permits.

Only selected species covered by the following provisions of the EPBC Act have been mapped: - migratory and - marine The following species and ecological communities have not been mapped and do not appear in reports produced from this database:

- threatened species listed as extinct or considered as vagrants - some species and ecological communities that have only recently been listed - some terrestrial species that overfly the Commonwealth marine area - migratory species that are very widespread, vagrant, or only occur in small numbers The following groups have been mapped, but may not cover the complete distribution of the species: - non-threatened seabirds which have only been mapped for recorded breeding sites - seals which have only been mapped for breeding sites near the Australian continent Such breeding sites may be important for the protection of the Commonwealth Marine environment. Acknowledgements This database has been compiled from a range of data sources. The department acknowledges the following custodians who have contributed valuable data and advice: -Office of Environment and Heritage, New South Wales -Department of Environment and Primary Industries, Victoria -Department of Primary Industries, Parks, Water and Environment, Tasmania -Department of Environment, Water and Natural Resources, South Australia -Department of Land and Resource Management, Northern Territory -Department of Environment and Heritage Protection, Queensland -Department of Parks and Wildlife, Western Australia -Environment and Planning Directorate, ACT -Birdlife Australia -Australian Bird and Bat Banding Scheme -Australian National Wildlife Collection -Natural history museums of Australia -Museum Victoria -Australian Museum -South Australian Museum -Queensland Museum -Online Zoological Collections of Australian Museums -Queensland Herbarium -National Herbarium of NSW -Royal Botanic Gardens and National Herbarium of Victoria -Tasmanian Herbarium -State Herbarium of South Australia -Northern Territory Herbarium -Western Australian Herbarium -Australian National Herbarium, Canberra -University of New England -Ocean Biogeographic Information System -Australian Government, Department of Defence -Forestry Corporation, NSW -Australian Tropical Herbarium, Cairns -eBird Australia -Australian Government – Australian Antarctic Data Centre -Museum and Art Gallery of the Northern Territory -Australian Government National Environmental Science Program -Australian Institute of Marine Science -Reef Life Survey Australia -American Museum of Natural History -Queen Victoria Museum and Art Gallery, Inveresk, Tasmania -Tasmanian Museum and Art Gallery, Hobart, Tasmania -Other groups and individuals

The Department is extremely grateful to the many organisations and individuals who provided expert advice and information on numerous draft distributions.

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