EOE (NO.75) PTY LIMITED
ABN: 95 006 829 787
Ardlethan Tin Mine
Traffic Impact Assessment
Prepared by
Barnson Pty Ltd
December 2016
Specialist Consultant Studies Compendium Volume 1, Part 4
This page has intentionally been left blank
EOE (NO.75) PTY LIMITED
ABN: 95 006 829 787
Traffic Impact Assessment
Prepared for: R.W. Corkery & Co. Pty Limited 62 Hill Street ORANGE NSW 2800
Tel: (02) 6362 5411 Fax: (02) 6361 3622 Email: [email protected]
On behalf of: EOE (No.75) Pty Limited ABN: 95 006 829 787 Level 2, 53 Berry Street NORTH SYDNEY NSW 2060 PO Box 1506 NORTH SYDNEY NSW 2059
Telephone: (02) 9959 5599 Fax: (02) 9959 5577 Email: [email protected]
Prepared by: Barnson Pty Ltd "Riverview Business Park" Unit 1, 36 Darling Street DUBBO NSW 2830
Tel: (02) 1300 138 657 Email: [email protected]
Ref No: : 25802-TIA01_B
December 2016
Note: A colour version of this report is available on the digital version of this document
This Copyright is included for the protection of this document
COPYRIGHT
© Barnson Pty Ltd 2016 and © EOE (No.75) Pty Limited 2016
All intellectual property and copyright reserved.
Apart from any fair dealing for the purpose of private study, research, criticism or review, as permitted under the Copyright Act, 1968, no part of this report may be reproduced, transmitted, stored in a retrieval system or adapted in any form or by any means (electronic, mechanical, photocopying, recording or otherwise) without written permission. Enquiries should be addressed to Barnson Pty Ltd.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Traffic Impact Assessment for the Rehabilitation and Tailings Reprocessing Project Ardlethan Tin Mine
Client: EOE (NO.75) PTY LIMITED
Dec-16 (Our Reference: 25802-TIA01_B) (Client Reference: 94502) © Barnson Pty Ltd 2016. Confidential. Subject to the Barnson Terms of Appointment
EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
LIST OF CONTENTS EXECUTIVE SUMMARY ...... 4-8 ABBREVIATIONS ...... 4-9 1.0 INTRODUCTION ...... 4-10 1.1 Project Background...... 4-10 1.2 Purpose and Scope ...... 4-12 1.3 Proposed Development ...... 4-12 1.3.1 Site Establishment ...... 4-13 1.3.2 Operations ...... 4-13 1.3.2.1 Tailings Extraction ...... 4-13 1.3.3 Tailings Reprocessing ...... 4-15 1.3.3.1 Rehabilitation (Tailings Deposition) ...... 4-15 1.3.4 Decommissioning ...... 4-15 2.0 EXISTING KEY INFRASTRUCTURE ...... 4-16 2.1 Road Network ...... 4-16 2.1.1 Function and Geometry ...... 4-17 2.1.1.1 Newell Highway ...... 4-17 2.1.1.2 Burley Griffin Way ...... 4-17 2.1.1.3 Mirrool Street/Ariah Street ...... 4-18 2.1.1.4 Bygoo Road ...... 4-19 2.1.1.5 Tin Mines Road ...... 4-20 2.1.2 Intersections ...... 4-21 2.1.2.1 Newell Highway/Burley Griffin Way intersection ...... 4-21 2.1.2.2 Burley Griffin Way/Mirrool Street intersection ...... 4-22 2.1.2.3 Ariah Street/Bygoo Road Intersection ...... 4-23 2.1.2.4 Bygoo Road/Tin Mines Road Intersection ...... 4-24 3.0 CONDITION...... 4-25 3.1.1 Assumed Existing Pavement Design ...... 4-25 3.1.2 New Pavements ...... 4-26 3.1.3 Visual Condition Inspection Findings ...... 4-26 4.0 FUTURE KEY INFRASTRUCTURE ...... 4-34 5.0 TRAFFIC FORECASTING ...... 4-36 5.1 Existing Traffic Counts ...... 4-36 5.2 Traffic Growth ...... 4-36 5.3 Background Traffic – Year of Opening (2017) and Design Year (2033) ...... 4-36 5.4 Traffic Generation ...... 4-37 5.4.1 Establishment Traffic/Decommissioning ...... 4-37 5.4.2 Operational Traffic ...... 4-38 5.4.3 Employee and General Traffic ...... 4-38 5.4.3.1 Staff Car Parking ...... 4-38 5.4.4 Traffic Generation Summary ...... 4-38 5.5 Traffic Distribution ...... 4-38
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
6.0 ROAD AND INTERSECTION ASSESSMENT ...... 4-39 6.1 Road Performance – Level of Service ...... 4-39 6.2 Intersection Performance ...... 4-40 6.3 Geometric Assessment ...... 4-40 6.3.1 Newell Highway, Burley Griffin Way and Bygoo Road ...... 4-40 6.3.2 Tin Mines Road ...... 4-41 7.0 RECOMENDATIONS ...... 4-43 7.1 Road Upgrades ...... 4-43 7.1.1 Capacity ...... 4-43 7.1.2 Condition ...... 4-43 7.1.3 Safety ...... 4-43 7.1.3.1 Road Geometry ...... 4-43 8.0 CONCLUSION ...... 4-44 8.1 Secretary’s Environmental Assessment Requirements ...... 4-44 8.2 Mitigation Summary...... 4-45 9.0 REFERENCES ...... 4-46
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
LIST OF FIGURES Figure 1 –Location of Ardlethan Tin Mine...... 4-11 Figure 2 –Ardlethan Tin Mine Site Layout...... 4-14 Figure 3 – Access route to/from Ardlethan Mine Site...... 4-16 Figure 4 – View of Newell Highway looking north-east...... 4-17 Figure 5 – Burley Griffin Way looking east towards Newell Highway...... 4-18 Figure 6 – Mirrool Street looking north towards the level crossing...... 4-18 Figure 7 – Bygoo Road looking north at Ardlethan Central School...... 4-19 Figure 8 – Bygoo Road looking south towards Ardlethan...... 4-19 Figure 9 – Tin Mines Road looking south...... 4-20 Figure 10 –Newell Highway/Burley Griffin Way Intersection looking towards Newell Highway...... 4-21 Figure 11 –Burley Griffin Way/Mirrool Street intersection looking towards Burley Griffin Way...... 4-22 Figure 12 –Burley Griffin Way/Mirrool Street intersection looking towards Mirrool Street...... 4-22 Figure 13 –Ariah Street/Bygoo Road intersection looking towards Mirrool Street...... 4-23 Figure 14 –Bygoo Road/Tin Mines Road intersection looking towards Tin Mines Road...... 4-24 Figure 15 – Cracking and stripping of the pavement surface on the road edges...... 4-28 Figure 16 – Block cracking laterally across sealed pavement...... 4-28 Figure 17 – Block cracking throughout section of pavement...... 4-29 Figure 18 – Loss of Surface Texture, Block Cracking and vegetation growing through pavement...... 4-29 Figure 19 – Loss of Surface Texture and vegetation growing through pavement...... 4-30 Figure 20 – Block cracking throughout section of pavement...... 4-30 Figure 21 – Scour at culvert from poor drainage...... 4-31 Figure 22 – Pot holing of pavement due to stripping of aggregate...... 4-31 Figure 23 – Deterioration of pavement especially at road edges and block cracking...... 4-32 Figure 24 – Ravelling of pavement near power station...... 4-32 Figure 25 – Pavement near Bygoo Road/Tin Mines Road intersection has recently been resprayed...... 4-33 Figure 26 – Pavement near Bygoo Road/Tin Mines Road intersection has recently been resprayed...... 4-33 Figure 27 – Proposed heavy vehicle bypass – realignment of Bygoo Road...... 4-34 Figure 28 – Proposed heavy vehicle bypass – realignment of Bygoo Road...... 4-35 Figure 29 –Turn Warrants ...... 4-40
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
LIST OF TABLES Table 1: Core and non-core criteria for Surface Inspection Ratings...... 4-25 Table 2: Flexible Pavement Design - Design Life 20yrs...... 4-26 Table 3: Pavement visual condition inspection findings for Tin Mines Road ...... 4-27 Table 4: Background Traffic Summary - AADT ...... 4-36 Table 5: Background Traffic Summary – AADT and Estimated Peak Hour flows ...... 4-37 Table 6: Peak Hour Flows on Two-lane rural roads (veh/hr) Design speed of 100km/hr...... 4-39 Table 7: Road Performance – Level of Service for Background Traffic...... 4-39 Table 8: Addressed SEARs ...... 4-44 Table 9: Mitigation Summary Table ...... 4-45
APPENDICES Appendix A – Tin Mines Road cross section ...... 4-47 Appendix B – Swept Path Analysis of 19m Semi-Trailer ...... 4-49 Appendix C – Secretary’s Environmental Assessment Requirements ...... 4-53
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09 EXECUTIVE SUMMARY
This Traffic Impact Assessment (TIA) has been commissioned by EOE (No. 75) Pty Ltd (EOE) (the Applicant) to support an Environmental Impact Statement (EIS) prepared by RW Corkery and Co Pty Limited (RWC). The TIA assesses the impact of the proposed development and operation of the Mine Site located on Tin Mines Road within the Coolamon Local Government Area, approximately 4km northwest of the Ardlethan Township, on the surrounding road network. The proposed Mine Site aims to retreat approximately 10.7 million tonnes (Mt) of tin tailings over four stages, each increasing production up to a maximum of 1.5Mtpa. The Mine Site is expected to reopen in 2017 and have a project life of approximately 15 years, bringing the design year of the Mine Site to 2033. The impact of the Mine Site on the existing road network was assessed for geometric, safety, condition and capacity concerns. This was undertaken by completing a site investigation which included a site survey, visual condition inspection and desktop analysis. It was found that traffic generated by the Mine Site had negligible impacts on the surrounding road network. Mitigation measures put forward in this report include upgrading Tin Mines Road to meet current Australian Guidelines which included renewal of the deteriorated pavement. The impact of traffic generated by the Mine Site are considered to be adequately mitigated if the recommendations provided within this report are undertaken by the Applicant.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09 ABBREVIATIONS
The following abbreviations are used throughout this document: AGTRD – Austroads Guide to Road Design DoS – Degree of Saturation EIS – Environmental Impact Statement ESA – Equivalent Standard Axles LEP – Local Environmental Plan LoS – Level of Service PCU – Passenger Car Units RQA – Regional Quarries Australia SISD – Safe Intersection Sight Distance tpa – Tonnes Per Annum NB – Northbound SB – Southbound TIA – Traffic Impact Assessment
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09 1.0 INTRODUCTION
1.1 Project Background EOE (No. 75) Pty Ltd (EOE) (the Applicant), a wholly owned subsidiary of Australian Tin Resources Pty Ltd (ATR), proposes to, extract and re-treat the tin tailings at the Ardlethan Hard Rock Tin Mine (“The Proposal”). The Site of the proposed activities is the Ardlethan Hard Rock Tin Mine (the Mine Site). The Mine Site is located on Tin Mines Road within the Coolamon Local Government Area, approximately 5km northwest of the Ardlethan Township upon land that is zoned as “RU1”, in which open-cut mining is permissible with consent from the Coolamon Shire Council. The location of the Mine Site is shown in Figure 1. Aberfoyle Resources Ltd commenced Tin mining at the Mine Site in 1912, and processed1.94 Mt of tin-bearing ore between 1912 and 1964. Between 1965 and 1986, they processed a further 9 Mt of ore averaging 0.46% ore. These operations ceased in 1986 as it became economically unviable to mine the hard rock resources. The processing by-product (tailings) was deposited in the Main and Spring Valley Tailings Storage Facilities, with a limited volume deposited in the White Crystal Open Cut Mine. Due to modern advancements in mining operations, it has become economically viable to re-process the tailings with indications that a 37.8% recovery of the tailings, producing a 41% tin concentrate is possible (Mineral Technologies, 2016).
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Source: Ardlethan Background Paper 754/06, July 2016, R.W. Corkery & CO. Pty. Limited. Figure 1 –Location of Ardlethan Tin Mine.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
1.2 Purpose and Scope This Traffic Impact Assessment (TIA) has been commissioned by the Applicant to support an Environmental Impact Statement (EIS) prepared by RW Corkery and Co Pty Limited (RWC). The purpose of this report is to assess the impact of the development on the safety and efficiency of the road network and provide recommendations to minimise the impacts of the total traffic generation to maintain safety, efficiency and standard of maintenance along the existing road network. The study area of this TIA includes the public road infrastructure to be used by vehicles generated by the Proposal. Specifically, the TIA assesses the impacts of the Proposal in accordance with RMS Guide to Traffic Generating Developments 2002, the DP&E’s EIS Guidelines Road and Related Facilities (DUAP, 1996), and the Secretary’s Environmental Assessment Requirements (SEARS) EAR Number 1065 dated September 2016 and associated stakeholder advice. The TIA includes: determination of key intersections and routes impacted by the proposed development; a review of existing key transport network conditions; determination of the impact of the traffic generated by the proposed development during the following stages: ▫ establishment and decommissioning phase ▫ operational phase Recommendations to minimise the impact of development traffic on safety, efficiency and standard of maintenance along the existing road network.
1.3 Proposed Development The Applicant proposes to seek development consent for the following. Extraction of approximately 10 million tonnes (Mt) of tailings from the Main and Spring Valley Tailings Storage Facilities. Transportation of approximately 9.5Mt of pre-flotation tailings to the run-of-mine (ROM) Pad. Transportation of approximately 0.5Mt of post-flotation tailings to the White Crystal Open Cut which has previously been used for placement of post-flotation tailings. Reprocessing of the extracted tailings using a gravity separation reprocessing plant to produce a tin concentrate suitable for sale to international customers. Transportation of the tin concentrate from the Mine Site to port via road. Placement of the reprocessed tailings into the Ardwest / Wild Cherry Open Cut. Rehabilitation of sections of the Mine Site, including: - the footprints of the Main and Spring Valley Tailings Storage Facilities; - the former processing plant, workshop and office area; and - other areas disturbed as a result of the Applicant’s activities. The Applicant proposes to seek development consent for the following (Figure 2). Extraction of approximately 10 million tonnes (Mt) of tailings from the Main and Spring Valley Tailings Storage Facilities. Transportation of approximately 9.5Mt of pre-flotation tailings to the run-of-mine (ROM) Pad.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Transportation of approximately 0.5Mt of post-flotation tailings to the White Crystal Open Cut which has previously been used for placement of post-flotation tailings. Reprocessing of the extracted tailings using a gravity separation reprocessing plant to produce a tin concentrate suitable for sale to international customers. Transportation of the tin concentrate from the Mine Site to port via road. Placement of the reprocessed tailings into the Ardwest / Wild Cherry Open Cut. Rehabilitation of sections of the Mine Site, including: - the footprints of the Main and Spring Valley Tailings Storage Facilities; - the former processing plant, workshop and office area; and - other areas disturbed as a result of the Applicant’s activities. Figure 2 below describes the Mine Site layout.
1.3.1 Site Establishment The site is expected to be established for operational activities mid 2017 once the pilot plant processing has been undertaken and the project is deemed by the Applicant to be viable. Site establishment is expected to take up to 3 months. The Proposal will make use of the existing site infrastructure including concrete hard stands, site offices, as well as the existing pilot plant. It is expected that the existing pilot plant will be supplemented with additional modules to increase production. The modules will be transported to site assembled, using Heavy Load Platforms (HLPs) or other such heavy moving vehicles. Therefore, it can be considered that construction related vehicle movements would be limited to approximately 12-15 semi-trailer loads bringing the modular plant and construction materials on site and two HLP vehicle movements.
1.3.2 Operations Operations at the Mine Site will comprise extraction, re-processing and transportation of the product and by-product over four stages. It will also include the progressive rehabilitation of the Mine Site. Operational activities will commence after the site has been established and is expected to continue for 15 years, bringing the design year to 2033. Hours of operation will be between 7:00am to 7:00pm 7 days per week for extraction operations and 24hrs a day, 7 days a week for processing, with a workforce of up to 28 persons. Transport operations during this stage of the project are expected to comprise of the following: Transportation of the product (tin concentrate) from the Mine Site; Limited consumables, principally diesel, delivered to the Mine Site via approximately one tanker per week; Movement of workers, visitors and others to and from the Mine Site.
1.3.2.1 Tailings Extraction Extraction of tailings from the Main and Spring Valley Tailings Storage Facilities would be undertaken with an excavator and would be removed typically in layers 3m to 4m in height. The tailings would be transported by off-road dump trucks using the existing internal road network to the run-of-mine (ROM) pad.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
Source: Ardlethan Background Paper 754/06, July 2016, R.W. Corkery & CO. Pty. Limited. Figure 2 –Ardlethan Tin Mine Site Layout.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
1.3.3 Tailings Reprocessing The tailings would be reprocessed using purpose-built modular gravity separation plant which can process approximately 30t per hour (tph) per module. The applicant intends to reprocess the tin tailings gradually increased the rate up 1.5Mtpa over four stages. This will result in modular plant progressively being delivered to the Mine Site over the duration of the project, no timeframe has been set for the staging, with the intention that the staging will be undertaken to meet market demands. It is expected the gradual increase in reprocessing capacity at the site will be as follows: Stage 1 – 30 tph or 250 000t per annum (tpa); Stage 2 – 60 tph or 500 000tpa; Stage 3 – 120 tph or 1Mtpa; and Stage 4 – 180 tph or 1.5Mtpa. At the proposed maximum production rate of 1.5Mtpa, the Applicant anticipates that 6 heavy vehicle loads (12 movements) per week will be generated by the Proposal to transport concentrate to/from the Mine Site.
1.3.3.1 Rehabilitation (Tailings Deposition) Reprocessed tailings would be pumped to the Ardwest/Wild Cherry Open Cut site and deposited predominately from the north-eastern and south-western sides of the open cut.
1.3.4 Decommissioning Decommissioning of the plant and equipment will occur once the operational activities at the Mine Site have ceased. It is expected that the removal of plant, equipment and buildings from the Mine Site will take 6 months to complete. Removal of infrastructure is anticipated to be undertaken using Low Loaders including HLPs. It is anticipated that approximately 20 trips using semi-trailers and heavy haulage equipment will be generated to remove heavy infrastructure and equipment from the Mine Site. Some earth moving plant will remain on site until the final rehabilitation has been undertaken. Final Rehabilitation of the Mine Site will be undertaken in accordance with legislative requirements as outlined in the Environmental Impact Statement (EIS). The areas which will undergo rehabilitation include: Tailings Storage Facilities Ardwest/Wild Cherry Open Cut Former proposed processing plant and office/workshop area Quarry materials extraction areas At this stage, all rehabilitation works will be undertaken with on-site material. The handling of any contaminated material will also occur on-site. Decommissioning of earth moving equipment is anticipated to be undertaken using Low Loaders including HLPs. It is anticipated that approximately two to three trips by heavy haulage vehicles will be generated to remove the plant. The hours of operation and workforce is anticipated to be the same as that for both the establishment and operational stages of the project.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09 2.0 EXISTING KEY INFRASTRUCTURE
2.1 Road Network During the establishment and decommissioning phases of the project, the traffic generated by the Proposal will be expected to originate within the local area and surrounding towns; predominately West Wyalong, Griffith and Wagga Wagga. The majority of operational vehicles entering and exiting the Mine Site from the external road network will originate or have their destinations either within the local area (staff), or for vehicles carried product, to one of the Port Authorities on the eastern coast of NSW. These vehicles will travel to the site via Tin Mines Road off Bygoo Road. Vehicles will travel to/from Newell Highway (north) via Ariah and Mirool Streets and the Burley Griffin Way. The key route to/from the Mine Site is described by Figure 3 below.
Source: SIX maps.com.au NSW Government Spatial Services Figure 3 – Access route to/from Ardlethan Mine Site.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
2.1.1 Function and Geometry
2.1.1.1 Newell Highway The Newell Highway (A39) forms a national highway which runs north-south connecting Tocumwal in Victoria to Goondiwindi in Queensland. It acts as the primary freight route of inland New South Wales, as well as a route for tourists. In proximity to Burley Griffin Way in Ardlethan, the Newell Highway is a two-way, two-lane undivided road with 3.5m wide lanes and 3m wide sealed shoulders. The posted speed limit is 110 km/hr. The road is flat with slight horizontal curvature. Refer to Figure 4.
Figure 4 – View of Newell Highway looking north-east.
2.1.1.2 Burley Griffin Way Burley Griffin Way (B94) is a state controlled route running east-west connecting the Hume Highway near Yass with Griffith. Although the road is funded by Roads and Maritime Services (RMS), the maintenance of the road is the responsibility of Temora Shire Council on behalf of Coolamon Shire Council. The road consists of a two-way, two-lane undivided sealed road with 3.5m wide lanes and between 2m to 3m unsealed shoulders each side. From the Newell Highway the road has a posted speed limit of 50 km/hr, where it changes to 100km/hr 500m west of the Burley Griffin Way/Mirrool Street intersection. This section of road provides access to small acreage residential properties. The alignment of this road is relatively straight and flat. Refer to Figure 5.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
Figure 5 – Burley Griffin Way looking east towards Newell Highway.
2.1.1.3 Mirrool Street/Ariah Street Mirrool Street is a local connector street, which connects the state and national highways with the town of Ardlethan. Mirrool Street has a 24m wide sealed cross-section with kerb and channel which is not line marked. Refer to Figure 6. Mirrool Street turns into Ariah Street via a 90 degree bend to the north. There is a give way “T” intersection at this corner with a small local street which services several small residential properties.
Figure 6 – Mirrool Street looking north towards the level crossing.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
2.1.1.4 Bygoo Road Bygoo Road is a distributor road which connects Ardlethan with West Wyalong. The road is a two-way road which has a 7m wide sealed roadway and unsealed shoulders. This road is flat and straight and is not line marked. The posted speed limit for Bygoo Road within the town limits is 50 km/hr which reduces to a 40 km/hr school zone. North of the town, the posted speed limit is 100 km/hr. Refer to Figures 7 & 8.
Figure 7 – Bygoo Road looking north at Ardlethan Central School.
Figure 8 – Bygoo Road looking south towards Ardlethan.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
2.1.1.5 Tin Mines Road Tin Mines Road is a no through local road which services one rural property, a power sub-station and the Mine Site. The road has a 5.4m wide sealed cross section with unsealed shoulders. Shoulders range in width of 0.5m to 2m, however it was noted that shoulders in some locations are heavily vegetated. Refer to Figure 9. The posted speed limit of Tin Mines Road is 100 km/hr. There are four sections of road with horizontal curvature with radii of 250m, 600m and two 500m curves from east to west respectively. The road’s vertical alignment also rises to the east with a positive increase in grade until the gates of the Mine Site. The road crosses three pipe culverts. As Tin Mines Road is a no through local road, with the only road users being one landowner who crosses the road to access adjacent farming land, and maintenance workers at the power sub-station, Coolamon Shire Council have deemed that maintaining the pavement has little benefit and that their funds are better allocated to roads with higher traffic volumes. As such, advice from Mr. Tony Kelly the Executive Manager at Coolamon Shire Council specifies that Council intend to allow Tin Mines Road pavement to deteriorate, returning the road to an unsealed gravel road.
Figure 9 – Tin Mines Road looking south.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
2.1.2 Intersections 2.1.2.1 Newell Highway/Burley Griffin Way intersection Burley Griffin Way forms a T intersection with the Newell Highway. A channelized right turn (CHR) and Auxiliary Left Turn (AUL) have been provided on the Newell Highway. Traffic controls consist of giveaway signs and hold lines on the Burley Griffin Way approach. Refer to Figure 10. The sight distance provided exceeds both the Approach Sight Distance (ASD) and Safe Intersection Sight Distance (SISD) required for trucks by Austroads Guide to Road Design Part 4A: Unsignalised and Signalised Intersections (AGRD Part 4A).
Figure 10 –Newell Highway/Burley Griffin Way Intersection looking towards Newell Highway.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
2.1.2.2 Burley Griffin Way/Mirrool Street intersection Mirrool Street forms a T intersection with Burley Griffin Way. An Auxiliary Right Turn (AUR) and Auxiliary Left Turn (AUL) have been provided on Burley Griffin Way. Traffic controls consist of one giveway sign on the Mirrool Street approach. Refer to Figures 11 & 12. The sight distance provided exceeds both the Approach Sight Distance (ASD) and Safe Intersection Sight Distance (SISD) required for trucks by Austroads Guide to Road Design Part 4A: Unsignalised and Signalised Intersections (AGRD Part 4A).
Figure 11 –Burley Griffin Way/Mirrool Street intersection looking towards Burley Griffin Way.
Figure 12 –Burley Griffin Way/Mirrool Street intersection looking towards Mirrool Street.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
2.1.2.3 Ariah Street/Bygoo Road Intersection Bygoo Street forms a T intersection with Mirrool Street. No give way signs have been provided at this intersection. Refer to Figure 13. The sight distance provided exceeds both the Approach Sight Distance (ASD) and Safe Intersection Sight Distance (SISD) required for trucks by Austroads Guide to Road Design Part 4A: Unsignalised and Signalised Intersections (AGRD Part 4A).
Figure 13 –Ariah Street/Bygoo Road intersection looking towards Mirrool Street.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
2.1.2.4 Bygoo Road/Tin Mines Road Intersection Tin Mines Road forms a T intersection with Bygoo Road. Each road has provisions for a Basic Auxiliary Right (BAR) and Basic Auxiliary Left (BAL) turn treatment. One giveway sign has been provided on the Tin Mines Road approach. Refer to Figure 14. The sight distance provided exceeds both the Approach Sight Distance (ASD) and Safe Intersection Sight Distance (SISD) required for trucks by Austroads Guide to Road Design Part 4A: Unsignalised and Signalised Intersections (AGRD Part 4A).
Figure 14 –Bygoo Road/Tin Mines Road intersection looking towards Tin Mines Road.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09 3.0 CONDITION
The road network was assessed using Surface Inspection Ratings to evaluate the condition of the pavement. This was undertaken using VicRoads Guide to Surface Inspection Rating which is based upon Austroads Guide to Pavement Technology Part 5: Pavement Evaluation and Treatment Design. The mode of distress, extent and severity of the distress was recorded along the key routes identified within this TIA. Both core and non-core assessment criteria were used to estimate the current condition of Spray Sealed Surfaces. The core criteria establishes the level of integrity of the surfacing layer and provides an indication of remaining service life of the pavement. Non-core criteria are secondary criteria used to indicate expected performance of the surfacing with regard to issues of traffic safety and ride quality. Table 1 below specifies the core and non-core assessment criteria used in the visual condition inspections. Table 1: Core and non-core criteria for Surface Inspection Ratings.
Core criteria Non-core criteria
Cracking Loss of Surface Texture
Loss of Aggregate (Stripping) Deformation
Binder Condition
3.1.1 Assumed Existing Pavement Design All highways, roads and local streets within the key road network potentially impacted by the proposal are expected to be flexible pavements, consisting of a double/double two coat spray seal pavement over base and sub base materials ranging in thickness. The existing pavements potentially failing due to shallow pavement thickness <300mm, insufficient pavement drainage, heavy traffic and weak subgrade. The existing pavement thickness is assumed be 250mm though has not been confirmed
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
3.1.2 New Pavements The design traffic required would be 5E6 ESA’s for industrial traffic with a design life of 20yrs and is shown in the below table: Table 2: Flexible Pavement Design - Design Life 20yrs.
A Wearing Surface to suit Design by others vehicle types
B 250mm Thick Base Coarse E = 350mPa or suitable quality Unbound Layer gravel with CBR >80% e.g. DGB20 see RMS 3051
C 250mm Thick Sub-Base E = 250mPa or suitable quality Unbound Layer gravel with CBR >60 e.g. DGS20 see RMS 3051
D Lime Stabilised Zone 3% Quick Lime by Weight 200mm depth
E Sub-grade Design CBR = 1-2%
3.1.3 Visual Condition Inspection Findings Pavement throughout the key road network potentially impacted by the Proposal is in good condition with only localised minor distress modes noted in a few locations such as small deformities from stripping. Overall, the Newell Highway, Burley Griffin Way, Mirrool Street/Ariah Street and Bygoo Road are noted to be in good condition with no maintenance required. Tin Mines Road was also noted to be in reasonable condition. It was evident that the road has not been maintained for a prolonged period of time, however due to the negligible volumes traversing the road, the pavement is considered to be in good condition with limited distress.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Table 3 below records the findings from the visual condition inspection of Tin Mines Road pavement conducted on Thursday 13th October 2016.
Table 3: Pavement visual condition inspection findings for Tin Mines Road
Core/ Extent Severity Figure Chainage* Mode of Distress Non-core Rating Reference
Road edges – Core Block cracking and stripping Road Minor Figure 15 entire road of pavement surface edges Figure 23 length
3170m Core Block cracking laterally Localised Minor Figure 16 across sealed pavement
Throughout road Core Block cracking throughout Section of Minor to Figure 20 from 500m to section of pavement pavement Moderate 3180m
3000m to 2500m Core Loss of Surface Texture, Section of Moderate Figure 18 Block Cracking and pavement Figure 19 vegetation growing through pavement
Straight Section Non-core Scour at culvert from poor Localised Moderate Figure 21 drainage
1000m Core & Pot hole from stripping of Full width Extensive Figure 22 Non-core aggregate
850m Core & Ravelling of pavement near Full Width Extensive Figure 24 Non-core power sub-station
0m to 500m - Pavement has been recently Road Moderate Figure 25 resprayed Edges Figure 26
*Chainage is measured from Bygoo Road/Tin Mines Road intersection.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
Figure 15 – Cracking and stripping of the pavement surface on the road edges.
Figure 16 – Block cracking laterally across sealed pavement.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Figure 17 – Block cracking throughout section of pavement.
Figure 18 – Loss of Surface Texture, Block Cracking and vegetation growing through pavement.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
Figure 19 – Loss of Surface Texture and vegetation growing through pavement.
Figure 20 – Block cracking throughout section of pavement.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Figure 21 – Scour at culvert from poor drainage.
Figure 22 – Pot holing of pavement due to stripping of aggregate.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
Figure 23 – Deterioration of pavement especially at road edges and block cracking.
Figure 24 – Ravelling of pavement near power station.
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Figure 25 – Pavement near Bygoo Road/Tin Mines Road intersection has recently been resprayed.
Figure 26 – Pavement near Bygoo Road/Tin Mines Road intersection has recently been resprayed.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09 4.0 FUTURE KEY INFRASTRUCTURE
Consultation with Coolamon Shire Council and RMS has indicated that Bygoo Road will be upgraded to provide for a heavy vehicle bypass of Ardlethan Township. The construction phase of the realignment project is expected to commence in mid to late 2017 and be completed by late 2018. Bygoo Road will be realigned to allow for Road Train access from Burley Griffin Way, bypassing Mirrool Street and Ariah Street. The concept layout for this project is described in Figure 27 and Figure 28 below. For the purpose of this report, the existing road design and layout of Mirrool Street and Ariah Street has not been considered as the majority of the operational traffic for the Mine Site will utilise the realigned Bygoo Road route. This route will be designed for Road Train access which exceeds the design vehicle of the Mine Site, which is a 19m B-Double vehicle.
Source: Coolamon Shire Council Figure 27 – Proposed heavy vehicle bypass – realignment of Bygoo Road.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Source: Coolamon Shire Council Figure 28 – Proposed heavy vehicle bypass – realignment of Bygoo Road.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09 5.0 TRAFFIC FORECASTING
5.1 Existing Traffic Counts Two-way Mid-block Traffic Counts on Newell Highway and Burley Griffin Way were obtained from the RMS Volume Viewer website within 600m of the Newell Highway/Burley Griffin Way intersection within the Ardlethan Township. These counts were undertaken in 2010. Counts taken at Station 95227 on the Newell Highway indicate a two way Average Annual Daily Traffic (AADT) of 1691 vehicles of which 34% are heavy vehicles. Counts at station 95299 on Burley Griffin Way indicate a two way AADT of 924 vehicles of which 19% are heavy vehicles. Count information was provided by Coolamon Shire Council for Bygoo Road. This indicates that the two-way volume (AADT) was 111 vehicles with 8% heavy vehicles. These counts were undertaken in 2011 outside of harvest period. Advice from Coolamon Shire Council specify that these volumes would increase four fold during harvest with the majority being heavy vehicles. No counts have been undertaken on Tin Mines Road, however Coolamon Shire Council advise that volumes at the time of writing this report would not exceed 20 vehicles per day.
5.2 Traffic Growth For the basis of this report, an Annual Growth rate of 1.5% has been adopted, which is the industry standard.
5.3 Background Traffic – Year of Opening (2017) and Design Year (2033) Using an Annual Growth rate of 1.5%, the compound traffic growth of background traffic with in the study area is summarised in Table 4 below. Table 4: Background Traffic Summary - AADT
Two-way Year of % HV Background Traffic - Background AADT Traffic 2017 Traffic - 2033 Traffic Count Count
Newell 1691 2010 34% 1877 2382 Highway
Burley Griffin 921 2011 19% 1007 1278 Way
Bygoo Road 111 2011 8% 121 154
Tin Mines Road 20 2016 10% 20 26
Conservatively, peak hour flows are taken as 12% of the AADT as per Austroads Guide to Traffic Management Part 3: Traffic Studies and Analysis for both rural urban fringe roads (Tin Mines Road) and Rural Strategic Roads (Newell Highway, Burley Griffin Way and Bygoo Road).
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Advice from Coolamon Shire Council advises that heavy vehicle volumes increase by a factor of 4 during harvest time, with vehicles spread out over the day. Table 5 below summarises the estimated peak hour flows with heavy vehicle numbers multiplied by a factor of 4. Table 5: Background Traffic Summary – AADT and Estimated Peak Hour flows
Road During Harvest Outside Harvest.
AADT – AADT - Peak Peak AADT – AADT - Peak Peak 2017 2033 Hour – Hour - 2017 2033 Hour – Hour - 2017 2033 2017 2033
Newell 1877 2382 Highway 4125 4812 495 577 225 286
Burley Griffin 1007 1278 Way 1801 2006 216 241 121 153
Bygoo Road 180 191 22 23 121 154 15 18
Tin Mines 20 26 Road 31 34 4 4 2 3
5.4 Traffic Generation
5.4.1 Establishment Traffic/Decommissioning As summarised in Section 1.3.1, Site Establishment Traffic would consist of heavy vehicles transporting equipment, infrastructure and processing plant to the Mine Site. Once transported to Mine Site, establishment traffic would be confined to within the Project Site, and therefore would not access the external road network as frequently as operational traffic. Site establishment traffic is forecast to be between 12-15 vehicles travelling to/from the site over a period of 3 months. Likewise, decommissioning traffic would consist of heavy vehicles transporting equipment, infrastructure and plant from the Mine Site. This traffic is forecast to be between 20 vehicles travelling to/from the Mine Site over a period of 6 months. Of these vehicles, it is anticipated that less than half are over size and over mass vehicles which would travel outside peak periods of the surrounding road network, after 6pm. The impact of over size and over mass vehicles on the road pavement would be minimal due to the low volume and speed of the vehicles.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09
5.4.2 Operational Traffic As detailed in Section 1.3, at maximum production the Mine Site would produce six (6) semi-trailer vehicle trips from the site over one week. The Mine Site will operate seven days a week between 7:00am to 6:00pm for extraction and period transportation operations and 24hrs a day, 7 days a week for processing operation. Delivery of consumables would be limited to one semi-trailer trip per week. The heavy vehicle traffic generated by operations is considered to be negligible with a maximum of 2 trips in and 2 trips out of the Mine Site per day. The design vehicle for this assessment is the 19m B-Double vehicle, which exceeds the general semi- trailer which will be used to transport product to/from site.
5.4.3 Employee and General Traffic The Applicant anticipates that during each stage of the project, a maximum of 28 staff will be on site at any one time. The majority of employees of the Mine Site are expected to arrive prior to 7:00am, with only a small proportion arriving after 7:00am. Likewise, it is expected that the majority of employees will leave the site after 6:00pm each day. Employees will therefore arrive and leave the Mine Site outside of the peak hours of the external road network.
5.4.3.1 Staff Car Parking The geometric layout and number of car parks will be designed in accordance with AS2890-2004 Parking Facilities – off-street car parking. However it is noted that historic mining activities on a larger scale than the Proposal, have left considerable hardstand areas available for parking of vehicles.
5.4.4 Traffic Generation Summary Based upon the traffic generation above, it is considered that the maximum traffic generation per day to the site will consist of 31 trips to/from the Mine Site per day. This number of trips will have a negligible impact on the performance of the surrounding road network and intersection performance.
5.5 Traffic Distribution All traffic generated by the Proposal on Tin Mines Road will access the Newell Highway via Bygoo Road and Burley Griffin Way.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09 6.0 ROAD AND INTERSECTION ASSESSMENT
6.1 Road Performance – Level of Service Table 6 below, taken from Section 4.1 of the RTA Guide to Traffic Generating Developments specifies the level of service of two lane rural roads based upon peak hour (veh/hr) flows. The level of service (LoS) for both the Newell Highway and Burley Griffin Way within the study area is summarised in Table 7 below for background traffic only.
Table 6: Peak Hour Flows on Two-lane rural roads (veh/hr) Design speed of 100km/hr.
Table 7: Road Performance – Level of Service for Background Traffic.
During Harvest Outside Harvest
2017 2033 2017 2033
Newell Highway C C B B
Burley Griffin Way B B B B
Bygoo Road B B B B
Tin Mines Road B B B B
A level of service of C is considered to be satisfactory operation.
As the Mine Site is only expected to generate a maximum of 31 trips per day, with trips concentrated before 7:00am and after 6:00pm, there will be no changes to the above level of service for the road sections and therefore the impact of Proposal generated traffic is considered to be negligible.
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6.2 Intersection Performance The intersection turn treatments at the Newell Highway/Burley Griffin Way intersection and Bygoo Road/Tin Mines Road intersection are appropriate to provide a satisfactory level of service for the through and turn volumes as per the warrants provided Austroads Guide to Road Design: Part 4A unsignalised and signalised intersections. Based upon Section 5 above, the through volumes during harvest period on the Newell Highway are 577 vehicles. The turn volumes have not been quantified but from Figure 29 below, it is noted that the CHR/AUL treatment is satisfactory for these volumes. The peak hourly volumes on Bygoo Road is 23 vehicles during harvest, with 4 vehicles turning off into Tin Mines Road. From Figure 29 below, it can be noted that the BAR/BAL treatment is satisfactory for this level of demand.
Source: Austroads Guide to Road Design: Part 4A unsignalised and signalised intersections Figure 29 –Turn Warrants
It is expected that the realignment of Bygoo Road will include an upgrade of the Burley Griffin Way/Bygoo Road intersection to include a channelized right turn treatment.
6.3 Geometric Assessment
6.3.1 Newell Highway, Burley Griffin Way and Bygoo Road The Newell Highway and Burley Griffin Way meet the requirements of the Austroads Guide to Road Design Part 3: Geometric Design. These roads have been designed for Road Trains which exceed the Proposal design vehicle which is the 19m prime mover with one trailer.
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The Bygoo Road Realignment Project aims to provide a route for freight vehicles to bypass the township of Ardlethan and accommodate Road Train vehicles. Therefore, the new road will meet the geometric requirements of current design standards and exceed the requirements for the Mine Site design vehicle.
6.3.2 Tin Mines Road Tin Mines Road provides for a sealed width of 5.4m with varying unsealed shoulder widths. This is considered to be undesirable, especially for a road with closed terrain as well as horizontal and vertical curvature. Sealed rural roads varying in width between 4.5m to 6.0m encourages two vehicles to pass each other which increases the likelihood of head-on collision. Although the background traffic volumes and traffic generated by the Proposal is very low and the likelihood of two vehicles travelling along Tin Mines Road in opposite directions simultaneously is low, it is still considered best practice to provide a minimum sealed width of 7.2m. It is recommended that Tin Mines Road is upgraded to provide a minimum of 7.2m sealed with 0.5m wide unsealed shoulders in line with Austroads Guide to Road Design Part 3: Geometric Design. A layout describing the recommended cross section is attached in Appendix A. Upgrade to the pavement should be facilitated when allowing for the new cross section. A swept path analysis of 19m prime mover and semi-trailer vehicles on the three horizontal curves on Tin Mines Road was undertaken. It was noted that a 7.2m sealed cross section with 0.5m unsealed shoulders provides for adequate clearance for this design vehicle to adequately negotiate the curves. Drawing 25802-SK01_A below shows the required cross section upgrades to Tin Mines Road. The Bygoo Road/Tin Mines Road intersection in its current form of a BAR/BAL meets Austroads Guidelines. It is recommended that a holding line is line marked on the Tin Mines Road Approach. A swept path analysis of a 19m prime mover and semi-trailer vehicle travelling at a speed of 20-30 km/h turning into/out of Tin Mines Road from Bygoo Road indicates that the existing geometric arrangement to the south side of the intersection is sufficient for the design vehicle of the Mine Site. The intersection will need to be widened on the northern side to allow sufficient entry and exit to and from the north of Bygoo Road. Refer to swept path analysis in Appendix B.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09 7.0 RECOMENDATIONS
7.1 Road Upgrades
7.1.1 Capacity The traffic generated by the Proposal would have a negligible effect on the surrounding road network operation, with no changes to the Level of Service that the existing roads and intersections are operating.
7.1.2 Condition Tin Mines Road pavement is recommended to be upgraded based upon the existing pavement condition. The existing pavement has exceeded its intended design life and has deteriorated and is starting to revegetate. The required pavement should be designed for a design life of 20 years and it is likely to consist of a two coat spray seal over a total of approximately 400mm of base and sub-base layers however this is subject to the subgrade conditions and final design. Given the low volumes on Tin Mines Road, and Council’s intent to return the road to Gravel, it is considered that it is fair and reasonable that the Applicant upgrade Tin Mines Road to accommodate its design vehicles as well as renew the pavement. Bygoo Road will be redesigned during the Realignment Project which will include new pavement. The increase in heavy vehicle volumes generated by the Mine Site would result in minor reductions to pavement life and it is recommended that a Section 94 Contribution, or equivalent arrangement, be established between the Applicant and Council.
7.1.3 Safety
7.1.3.1 Road Geometry It is recommended that Tin Mines Road be upgraded to provide a 7.2m wide seal with unsealed 0.5m shoulders.
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09 8.0 CONCLUSION
8.1 Secretary’s Environmental Assessment Requirements The Secretary’s Environmental Assessment Requirements (EAR) Ear Number 1st September 2016 and attached in Appendix C have been addressed. Table 8 itemises the sections in which the key issues are addressed. Table 8: Addressed SEARs
SEARs/Key Issues Section Addressed
Impact of establishment, operational and 1.3 Proposed Development decommissioning phase generated traffic including: and Operation of the Mine Site: Road Transport Volumes and Vehicle Types broken down into: Movement of vehicles; Parking of construction related and personal vehicles. Projected Transport Operations including: 2.0 Existing Key Infrastructure Existing and anticipated traffic 4.0 Future Key Infrastructure generated on the surrounding road 5.0 Traffic Forecasting network; 6.0 Road and Intersection Assessment Vehicle types and volumes; 7.0 Recommendations Peak traffic volumes; Travel routes for vehicles accessing the development site; Cumulative impacts of existing and anticipated volumes on the surrounding road network. Traffic Management Plan for all operations across A Traffic Management Plan, including Driver the whole site Code of Conduct, will be developed at a later stage once initial approvals have been granted.
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
8.2 Mitigation Summary In summary, the impact of site establishment, operational and decommissioning traffic generated by the Mine Site could be successfully mitigated by undertaking the recommendations provided in Table 9 below. Table 9: Mitigation Summary Table
Impact Recommendations
Capacity No recommendations. Traffic impacts on existing road network capacity from the Mine Site is minor, with all road infrastructure operating at the same Level of Service prior to the development traffic being applied.
Geometric Tin Mines Road should be upgraded to allow for a sealed with of 7.2m with unsealed 0.5m wide shoulders. The upgrade should consist of the following, with detailed design undertaken in accordance with Australian Standards, Council and AUSTROAD specifications: Pavement Design based upon 20 year design life to account for high percentage of heavy vehicles and geometry Widening of the road carriageway and sealing shoulders to allow for adequate manoeuvrability of road users. Final road cross sections to be subject to final design. A VPA established between the Applicant and Council would enable proportional contribution of various road users and the road authority (Council) for Tin Mines Road upgrade and future road maintenance issues to be defined and enforced. Provide Section 94 Contribution for road maintenance impacts on Bygoo Road.
Safety The Applicant is to provide car parking in accordance with RTA Guide to Traffic Generating Developments and AS2890-2004 Parking Facilities – off- street car parking. The Applicant should develop and enforce an appropriate Driver Code of Conduct as part of a Traffic Management Plan for the site to manage road safety issues associated with the development. .
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EOE (NO.75) PTY LIMITED SPECIALIST CONSULTANT STUDIES Ardlethan Tin Mine Part 4 – Traffic Impact Assessment Report No. 754/09 9.0 REFERENCES
Australian Standards 2009, AS1742.2: 2009 – Manual of Uniform Traffic Control Devices
AUSTROADS 2011, Guide to Road Design: Part 3: Geometric Conditions
AUSTROADS 2011, Guide to Road Design: Part 4A: Unsignalised and Signalised Intersections
AUSTROADS 2011, Guide to Road Design: Part 4B: Roundabouts
AUSTROADS 2011, Guide to Pavement Technology Part 5: Pavement Evaluation and Treatment Design
Roads and Maritime Services 2010, RMS Delineation Section 17 – Alignment Signs and Markers Version 1 Roads and Maritime Services 2015, RMS Supplement to Austroads Guide to Road Design Part 3: Geometric Design Version 2.0 publication NO. 11.092 12 August 2015.
Vic Roads 2009, Technical Bulletin 50 Guide to Surface Inspection Rating for Pavements Surfaced with Spray Seals and Asphalt
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Appendix A – Tin Mines Road cross section
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Appendix B – Swept Path Analysis of 19m Semi-Trailer
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SPECIALIST CONSULTANT STUDIES EOE (NO.75) PTY LIMITED Part 4 – Traffic Impact Assessment Ardlethan Tin Mine Report No. 754/09
Appendix C – Secretary’s Environmental Assessment Requirements
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