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Construction Heritage Management Plan

Epping to Thornleigh Third Track Alliance

Construction Heritage Management Plan Epping to Thornleigh Third Track Alliancei

Construction Heritage Management Plan

Document Control

Title Construction Heritage Management Plan (HMP)

Document Number/Ref: ETTT-ETTTAL-PE-000079

Task Name Position Signed/Approved Date

ORIGINATOR Lucy Havyatt Environment Advisor 03/03/16

REVIEW Reece Wilkie Environment Manager 03/03/16

REVIEW Andrew Naylor Construction Manager 03/03/16

APPROVAL Scott Hunter Alliance Manager 03/03/16

Details of Revisions

Rev Date Description0 15/05/2013 Initial document submission for TPD review

1 04/06/2013 Updated to reflect draft CoA

2 26/06/2013 Updated to reflect final draft CoA and edited following TPD / EMR review

3 11/07/2013 Revised following comment close out meeting

4 23/07/2013 Updated to reflect project determination

5 21/08/2013 Updated following Consultation with Council and Agencies

6 04/08/2013 Compiled for DP&I Review and Approval

7 28/10/2013 Updated following DP&I Comments Initial for Construction

8 24/02/2014 Removal of procedures to central location Addition of details regarding Aboriginal Heritage site 45-6-3067

9 2/04/2014 Addition of Devlins Creek Causeway Protection Plan

10 15/03/15 Annual review, updated for Organisation Chart and as appropriate department name change DP+E. Incorporate document design changes in-line with Web Content Accessibility Guidelines (WCAG)

11 03/03/2016 Annual review, update of Organisation Chart and as appropriate department name change DP+E. Incorporate document design changes in-line with Web Content Accessibility Guidelines (WCAG)

Construction Heritage Management Plan Epping to Thornleigh Third Track Allianceii

Contents

1 Objective 2

2 Legislation, Licences, Standards, Planning Instruments and Guidelines 3

3 Consultation 4

4 Supporting Procedures, Forms, Checklists and Registers 5

5 Process 6

6 Known Aboriginal Heritage Sites along the Corridor 7

7 Known Historic Heritage Sites along the Corridor 8

8 Management 15

9 Goals and Limits 16

10 Monitoring 17

11 Reporting 18

12 Incidents and Non-Conformances 19

13 Review 20

14 Devlins Creek Causeway Protection Plan 26

Annexure A – Heritage Management Plan Compliance Tracking Sheet 31

Construction Heritage Management Plan Epping to Thornleigh Third Track Alliance1

Figure 1: Construction Heritage Management Flowchart

Appropriate Training

All personnel are to receive Environmental Inductions and ongoing training via Toolbox Talks covering responsibilities under both the National Parks and Wildlife Act 1974 and Heritage Act 1977 and identification of possible artefacts.

Protect Known Sites

All known sites within and adjacent to the corridor and not impacted by the project are to be protected. (Fencing and signage)

Potential Unknown Heritage Item Encountered

For any unexpected heritage find, including uncovering human remains, works shall stop immediately in that area and the Environment Manager contacted who will alert the relevant groups e.g Registered Aboriginal Stakeholders, OEH, DP+E and /or Police. The area will be cordoned off immediately.

Manage Known Sites

Sites to be impacted by the works are to be managed as per CoA, REMM and EIS requirements. Known sites are identified in Table 5 and 6.

Site Foreman Environment CoordinatorEnvironmental Manager

Environment CoordinatorHeritage Consultant

Agencies

Environment Coordinator

Heritage Consultant

Agencies

Environment Manager


Project Engineer

Environment ManagerSite Foreman

Project Engineer

Environment ManagerEnvironment Coordinator


Nominated Heritage Consultant

• Environment Manager will contact the Project Heritage Consultant for identification and assessment of the significance of heritage items. Where skeletal remains are identified, the project cannot undertake works until Police investigations are complete.

Nominated Heritage Consultant

• Environment Manager will contact the Project Heritage Consultant for identification and assessment of the significance of heritage items. Where skeletal remains are identified, the project cannot undertake works until Police investigations are complete.

Heritage Significance

• Upon confirmation the heritage find is genuine, the Environment Manager and the Heritage Consultant to notify the relevant authorities and organisations (e.g. OEH, Heritage Branch (Non-indigenous) or OEH, DP+E and Aboriginal Stakeholders (Indigenous))

Assessment & Available Options

• Is destruction or removal of the find the only available option?

Construction to Recommence

• Further approvals will be secured as required.• After completion of all the relevant steps, construction works are to recommence.

Close-out and Finalise Reporting /Notification and Assessment

• Report to be submitted to Department of Planning / OEH and other relevant authorities / organisations as required to finalise the find.

Record & Assessment

The Heritage Consultant on confirmation of a genuine item/site/relic:

• Officially record the find (e.g AHIMS);• Conduct an assessment of significance; and determine management options.

Hold Points in Inspection Test Plans (ITPs) Any construction that may impact the heritage item cannot occur until the Archival recording hold point is

released. Hold point will be signed off by the Environment Coordinator.

No

Destruction or Removal of the Heritage Find is not Necessary

Yes

Destruction or Removal of the Heritage Find is required

Action to be taken Responsibility


1 Objective

• This plan has been developed to address Condition of Approval (CoA) E34(e) relating to the preparation of a Construction Heritage Management Plan. The plan also addresses the relevant commitments from the Revised Environmental Management Measures, TSR-E1 and Environmental Impact Statement documentation.

• The purpose of this plan is to define how construction impacts on Aboriginal and Historic Heritage will be minimised and managed during the construction phase of the Epping to Thornleigh Third Track Project (the Project) and to ensure that no unexpected impacts occur to known heritage sites.

• This Plan forms part of the overall Project Construction Environmental Management Plan (CEMP) and addresses the specific CoA, REMMs and other applicable conditions relating to the management of construction impacts on heritage during construction (refer to Section 3.1 of the CEMP for further detail).


2 Legislation, Licences, Standards, Planning Instruments and Guidelines

• Table 1 below details the legislation, licences, standards, planning instruments and guidelines considered during development of this Plan.

Table 1: Legislation, Licences, Standards, Planning Instruments and Guidelines Applicable to the Project

Legislation / Licences Standards & Guidelines Planning Instruments• Environmental Planning

and Assessment Act 1979• Standard Requirements TSR-E1

Environmental Management (Transport for NSW 2013)

• Project Planning Approval

Dated: 17 July 2013

• Heritage Act, 1977 • Guideline for the preparation of Environmental Management Plans (DIPNR 2004)

• Epping to Thornleigh

Environmental Impact

Statement

• National Parks and Wildlife Act, 1974

• Due Diligence Code of Practice for the Protection of Aboriginal Objects in NSW (DECCW 2010)

• Epping to Thornleigh Submission Report and Revised Environmental Mitigation Measures (REMMs)

• Aboriginal Cultural Heritage Consultation requirements for Proponents (DECCW 2010)

• Photographic Recording of Heritage Items using film or digital capture (Department of Planning, NSW Heritage Branch 2006)

• How to prepare Archival Records of Heritage Items (Department of Planning, NSW Heritage Branch 1998)

• Code of Practice for Archaeological Investigation of Aboriginal Objects in NSW (DECCW 2010)

• A heritage management compliance tracking sheet is provided in Annexure A.


3 Consultation

• Development of this HMP will be undertaken in consultation with NSW Heritage Council, and Railcorp in accordance with CoA E34(e).

• As no impacts to Aboriginal Heritage were identified in the Environmental Impact Statement (EIS), consultation with Registered Aboriginal stakeholders is not required in the development of this plan. In the event that Aboriginal items are discovered by the Project the registered stakeholders will be consulted with.


4 Supporting Procedures, Forms, Checklists and Registers

• Tools that are used to support the implementation of this Plan are detailed within Table 2 below.

Table 2: Supporting Procedures, Forms, Checklists and Registers Applicable to the Project

Procedure Form Checklist Register• Unexpected Heritage or

Human Skeletal Remains Find Procedure

• Permit to Enter No Go Zone

Supporting documentation below can be found in the CEMP

• Weekly Environmental Inspection Procedure

• Environmental Inspection Actions Form

• Weekly Environmental Inspection Checklist

• Stop Work Report Form

• The supporting documents applicable to the management of vibration are provided separately on the TfNSW Website and on the Alliance’s “Our Way” management system


5 Process

• Prior to and during construction, the management of heritage impacts will follow the process identified in Figure 1.


6 Known Aboriginal Heritage Sites along the Corridor

• The EIS identified the proposal as having low/no archaeological potential. This is due to the high levels of ground disturbance and landscape modification throughout the rail corridor and adjacent surrounds.

• No new Aboriginal sites or areas of archaeological potential were identified during field surveys within the project area.

• Registered Aboriginal Stakeholders for the project include Metropolitan Local Aboriginal Land Council, Darug Land Observations, Darug Custodial Corporation, Darug Tribal Aboriginal Corporation, Darug Aboriginal; Cultural Heritage Assessments, Darug Aboriginal Land Care Inc, Gunjeewong Cultural Heritage Aboriginal Corporation and Yarrawalk.

• The nearest sites to the project are identified in Figure 2 and Table 3.

Table 3: Aboriginal Sites near the corridor

Site Identification

Type Impact

45-5-1005 Isolated find (subsequent investigations could not locate artefact therefore item has been removed from AHIMS register).

None

45-6-3067 Open Site. (Portion on western side of The Crescent) None

Figure 2: Aboriginal Sites near the Project Corridor


Table 4: Registered Aboriginal Stakeholder groups

Registered Aboriginal Stakeholder Groups RepresentativeMetropolitan Local Aboriginal Land Council (MLALC) Paul Morris

Darug Land Observations (DLO) Gordon Workman

Darug Tribal Aboriginal Corporation (DTAC) Sandra Lee

Darug Aboriginal Cultural Heritage Assessments (DACHA) Gordon Morton

Darug Aboriginal Land Care Inc Des Dyer

Gunjeewong Cultural Heritage Aboriginal CorporationGCHAC) Cherie Carroll Turrise

Yarrawalk Scott Franks

Darug Custodian Aboriginal Corporation (DCAC) Leanne Watson


7 Known Historic Heritage Sites along the Corridor

• The EIS identified that the project area has a range of historic heritage constraints with the project passing through the Beecroft/Cheltenham Heritage Conservation Area and 44 heritage listed sites. As the project is within the rail corridor, the EIS identified that it was unlikely to have a significant negative impact on heritage areas within the Conservation Area.

• Notwithstanding, direct impacts will occur to the following areas:

» Three locally listed areas of bushland, close to or within the rail corridor.

» The Beecroft Railway Station group, including the pedestrian subway and former side platform which is listed on the Hornsby LEP and the RailCorp Section170 Register.

• Indirect impacts may occur to the following areas:

» New bridge over the M2 constructed close to the convict-built stone causeway at Devlins Creek.

» The heritage items adjacent to the Cheltenham Station (Numbers 44-56 The Crescent).

• Historic heritage sites in the vicinity of the project are identified in Table 6 below and Figure 4.

Table 5: Vibration Velocity Guide Values – Short Term Vibration on Structures (mm/s) to Avoid Cosmetic Damage

Building Type Vibration at the foundation at a frequency of

Vibration at horizontal plane of highest floor at all frequencies

1Hz to 10Hz

10Hz to 50Hz

50Hz to 100Hz

Structures that, because of their particular sensitivity to vibration, cannot be classified under lines 1 and 2 and are of great intrinsic value (e.g. heritage listed buildings / structures)

3 3 to 8 8 to 10 8

(Source: Construction Vibration (damage limits) German Standard DIN 4150 Part 3-1999 Structural Vibration in Buildings – Effects on Structures)


Table 6: Historic Heritage in Proximity to the Project

Site Identification Significance Type Impact MitigationBeecroft Station Group

(Refer to Figure 8-10)

• Historically significant due to its association with the opening of the railway line from Strathfield to Hornsby in 1886, an event which led to the rapid subdivision and development of the area.

• The grouping of station building, platform, pedestrian subway and surrounding parks and bushland has remained unchanged since 1914.

Modifications to the heritage-listed pedestrian subway, including the replacement of the roof and the extension of the tunnel

Direct • Sensitive surface finishes; and

• Archival recording prior to modification.

The partial or complete removal of the former side platform at Beecroft Railway Station.

Direct • Archival recording of the platform is undertaken prior to its removal. Recording both pre and post vegetation removal.

• Interpretive signage installed at Beecroft Station to aid in the interpretation of significance.

• Advice will be sort from a qualified Arborist on how best to avoid impacts to the remaining Bunya Pines.

• Protection such as fencing and Signage will be put in place around the remaining Bunya Pines within the garden during construction.

Heritage Listed Bushland (Refer to Figure 7)

• Aesthetically significant as an important local landmark that is the dominant background to the railway station.

• Visually significant to train passengers and locals.

• Contributes to the visual character of the locality and the Beecroft Cheltenham Heritage

Removal of vegetation and trees from the rail corridor between Beecroft and Pennant Hills Station.

Direct • Retain as much vegetation as possible between the rail corridor and Beecroft Road/Wongala Crescent; and/or

• Replant vegetation following the completion of the project.


Site Identification Significance Type Impact MitigationDevlins Creek (Refer to Figure 6)

• The causeway is significant for its historical and research values, and as a rare and significant remnant of the Great North Road, which opened the local area for settlement.

Devlins Creek causeway

Indirect • Concept design developed to avoid impacts to the heritage item and surrounding area which may be of archaeological potential.

• Area to be fenced off during construction and covered with plastic sheeting to avoid accidental damage.

• Where feasible and reasonable, the project will avoid physically affecting the heritage listed causeway at Devlins Creek. Details of the Devlins Creek protection during construction are provided in Section 14 of this management plan.

• Prior to the commencement of pre-construction and/ or construction activities that may impact the historical archaeological site at Devlins Creek, an archaeological excavation program will be undertaken by an appropriately qualified archaeological heritage consultant in accordance with the Heritage Council of NSW Archaeological Assessments Guideline (1996) using a methodology prepared in consultation with the Heritage Council of NSW. Within 2 years of completing the work, unless otherwise agreed by the Director General, a report will be submitted containing the findings of the excavations, including artefact analysis, and the identification of a final repository for any finds, prepared in consultation with the Heritage Council of NSW.


Site Identification Significance Type Impact MitigationThe Crescent, Cheltenham (Refer to Figure 11)

• Historically and aesthetically significant as an example of a simple garden from the 1940s.

• Demonstrates the characteristics of such gardens and the evolution of suburban garden design in the local area.

• Gardens are from this period and are notable in the streetscape.

Heritage items at 44-56 The Crescent through:

construction of the proposed two-storey concourse at the station; and

the removal of trees along the southern side of the station car park.

Indirect • Screening vegetation should be retained or replanted along the southern side of the proposed Cheltenham Station car park, where possible.

• Screening Vegetation to be detailed within the Urban Design and Landscape Plan

Cheltenham Recreation club

• Clubs grounds are aesthetically significant for the mature palm tree and entry planting dating to the 1950s, and views to period trees in adjoining properties

Cheltenham Recreation club grounds

None • No mitigation measures are proposed.


Figure 4 Project area and Heritage Item Location Map


Figure 5: Possible indigenous artefacts Figure 6: Wongala Crescent Bushland

Figure 7: Devlins Creek Convict Causeway Figure 8: Heritage bushland (on project boundary)

Figure 9: Beecroft Station Pedestrian Tunnel Figure 10: Former Beecroft Station Side Platform

Figure 11: Beecroft Station Gardens Figure 12: The Crescent, Cheltenham


8 Management

• Measures in Table 7 will be implemented for the project to manage potential heritage impacts associated with construction for the project.

• The project induction will include identification of sensitive heritage areas, heritage artefact awareness, protection of heritage sites and unexpected finds process.

• All known heritage sites within the project corridor such as the Devlins Creek causeway will be added to the Environmental Control Maps (ECMs) for the project with protective fencing and environmental signage installed (depicting the area as a no-go zone) prior to the commencement of construction. Details of the Devlins Creek protection during construction are provided in Section 14 of this management plan.

• If Aboriginal Objects are located during works, all works must stop in the vicinity of the find, and the NSW Office of Environment and Heritage, Registered Aboriginal Stakeholders and Project Archaeologist will be notified. The unexpected heritage or human Skeletal remains find procedure will be enacted.

• If Non-Aboriginal Objects are located, works will cease in the vicinity of the find, the area fenced off and OEH (Heritage Branch) and the Project Archaeologist notified. The unexpected heritage or human Skeletal remains find procedure will be enacted.

• All heritage registers to be updated accordingly for unexpected finds.

• Works will not recommence in the vicinity of the Aboriginal or Non-Aboriginal artefact/item until the Unexpected Heritage or Human Skeletal Remains Find Procedure has been followed and completed.

• Archival recording will be undertaken of relevant Historic Heritage items identified in Table 6 Following approval from the ER, and prior to commencement of construction the Environment Coordinator and Foreman implement the required Environmental No-Go Fencing (including buffer zone) around all known heritage items.

• If the proposal design is changed, and areas not surveyed are to be impacted, further archaeological assessment would be undertaken and appropriate consistency and/or modification assessment completed prior to the works occurring.

• Prior to the commencement of pre-construction and/ or construction activities that may impact the historical archaeological site at Devlins Creek, the project archaeologist shall be consulted regarding the practicality of further investigations and preparation of an archaeological excavation program in accordance with the Heritage Council of NSW Archaeological Assessments Guideline (1996) using a methodology prepared in consultation with the Heritage Council of NSW.

• Specific management and mitigation measures will be employed at Beecroft Station formal garden and associated Bunya Pines as recommended by the Project Archaeologist in the event direct/indirect impacts are identified.

• Prepare interpretive signage on the history and configuration of the former side platform at Beecroft which shall be developed in consultation with relevant stakeholders including but not necessarily limited to RailCorp and Hornsby Shire Council.

• Project wide tool-boxing on the presence of Aboriginal Heritage Site 45-6-3067. It cannot be established as a fenced off “Environmental No-Go Area” due to it not being on project property.


9 Goals and Limits

• Vibration monitoring of identified Heritage items within the vicinity of the proposal will be conducted as part of construction activities in accordance with the Vibration Management Plan for the project. Where goals for heritage items are triggered, additional mitigation and management measures will be employed.

• Acceptable outcomes in terms of Construction heritage manage is defined as;

» No unexpected impacts to known heritage items; and

» Adherence to the Unexpected Heritage or Human Remains Find Procedure in the event of a find.


10 Monitoring

• The Environment Coordinator will undertake weekly inspections and monitoring of construction activities to ensure compliance with the requirements of the CoA, REMM and this plan.

• The Weekly Environmental Inspection Checklist will be used to maintain compliance and effectiveness of controls.

• If actions are required, then an actions form will be completed and issued to the foreman for action. These actions will be tracked to ensure items are closed out within the appropriate timeframes.

• Vibration monitoring of high risk activities shall be undertaken at Devlins’ Creek in accordance with the Vibration Management Plan.

• Vibration monitoring will be undertaken in accordance with the Construction Noise and Vibration Management Plan. The relevant criteria is presented in Table 5 of this plan.


11 Reporting

• Archival recording will be undertaken for the former Beecroft station side platform and Beecroft Station pedestrian underpass prior to the commencement of construction.

• Recording and/or salvage of Aboriginal/Non Aboriginal items will be undertaken in accordance with relevant guidelines in accordance with the relevant approval for the unidentified find associated with the project.

• Within 2 years of completing the work unless otherwise agreed by the Secretary of DP+E (formerly Director General of DP&I), a report will be submitted to the Secretary containing the findings of the excavations, including artefact analysis, and the identification of a final repository for any finds, prepared in consultation with the Heritage Council of NSW.

• The Weekly Environmental Inspection Checklist will be used to ensure that all environmental aspects are reviewed during inspection of the project. Actions arising from the inspections will be recorded on the Environmental Inspection Actions Form and each action will be allocated to the foreman for the work area.

• Periodic reporting will be completed in accordance with Table 14 of the CEMP and in accordance with relevant Heritage legislation.


12 Incidents and Non-Conformances

• In the event of a heritage incident, the process within Section 9 of the CEMP will be followed.

• In addition to that described in Section 9 of the CEMP, in the event of damage to the heritage causeway, remedial action would be carried out in accordance with advice from the an appropriately qualified archaeological heritage consultant in consultation with the Heritage Council of NSW.

• Other non-conformances relating to heritage will be managed as per the process detailed within Section 8.5 and Table 16 of the CEMP.


13 Review

• A management review of the HMP will be undertaken to ensure its continuing suitability, adequacy and effectiveness. Reviews will include assessing opportunities for improvement and the need for changes to the system, including the environmental policy and environmental objectives and targets. The management reviews will occur:

» On an annual basis to ensure its continuing effectiveness

» Within 1 month following a major (Class 1) incident

» Where an audit recommends a review

» Where there are repeat non conformances and these are not closed out within the agreed timeframe

» As otherwise determined by the Environmental Manager.

Table 7: Mitigation Measures

No. Requirement Mitigation Measure Timing Responsibility Tool

General Controls 1. CoA E34 (e) (iii)

REMM J.5

The project induction will contain slides which outline historic heritage items within, and adjacent to the project including obligations, identification, protection and conservation.

Pre-construction Environmental Manager Project Induction

2. CoA E34 (e)( i) (IV)

REMM J.5

Basic training in the recognition of Aboriginal cultural heritage material will be undertaken for site inductions. This training would include information such as the importance of Aboriginal cultural heritage material and places to the Aboriginal and non-Aboriginal community, as well as the legal implications of removal, disturbance and damage to any Aboriginal cultural heritage material and sites.

All times Environmental Manager Project Induction

3. REMM P.1 Historic heritage items will be identified on Environmental Control Maps (ECM).

Pre-construction Environmental Manager ECM

4. REMM Q.2 If the project design changes and areas not previously surveyed are to be impacted, an initial desktop and where required further archaeological assessment will be undertaken.

Pre-construction

Construction

Environmental Manager / Design Manager

Environmental Consistency Assessment


No. Requirement Mitigation Measure Timing Responsibility Tool5. TSR-E1 Aboriginal and non-Aboriginal archaeological sites and cultural

heritage places located immediately outside the construction site boundary will be identified on heritage site maps with input from the project archaeologist heritage consultant as appropriate so that these areas can be avoided during construction.

Pre-construction Environmental Manager ECM

6. REMM P.4 Wherever possible, screening vegetation would be retained or replanted along the southern side of the proposed Cheltenham Station commuter car park to mitigate any impacts to the views and setting of Numbers 50–56 The Crescent.

Construction Construction Manager UDLP / FFMP

7. REMM P.2 As much vegetation as possible would be retained between the rail corridor and Beecroft Road/Wongala Crescent. Cleared vegetation would be replanted, where appropriate, as soon as possible after completion of construction.

Construction Construction Manager

Environmental Manager

UDLP / FFMP

8. REMM J.9 Subject to landowner agreement, building condition surveys would be completed on the following buildings/structures prior to proximate piling, excavation or bulk fill or any vibratory impact works including jack hammering and compaction (unless otherwise determined as not being adversely impacted by a qualified geotechnical engineer)

• All buildings/structures/roads with a plan distance of 50m from the edge of the works;

• All heritage listed buildings and other sensitive structures within 150 metres from the edge of the works.

Any damage to buildings, structures, lawns, trees, sheds, gardens etc. as a result of construction activity direct and indirect (i.e. including vibration and groundwater changes) shall be rectified at no cost to the owner(s).

Pre-Construction Environmental Co-coordinator/

Construction Manager/

Foreman

Table 6 Historic Heritage in Proximity to the Project

Table 5: Vibration Velocity Guide


No. Requirement Mitigation Measure Timing Responsibility Tool

Devlins Creek Mitigation Strategy9. CoA C28

CoA C29

Prior to the commencement of pre-construction and/ or construction activities that may impact the historical archaeological site at Devlins Creek, the project archaeologist shall be consulted regarding the practicality of further investigations and preparation of an archaeological excavation program in accordance with the Heritage Council of NSW Archaeological Assessments Guideline (1996) using a methodology prepared in consultation with the Heritage Council of NSW. In the case of test excavations, within 2 years of completing the work, unless otherwise agreed by the Director General, a report will be submitted containing the findings of the excavations, including artefact analysis, and the identification of a final repository for any finds, prepared in consultation with the Heritage Council of NSW.

Prior to activities that may impact Devlins Creek

Environmental Manager Archaeologist Report

Refer to Section 14 of this plan

10. REMM D.4 The design for the new bridge crossing Devlins Creek would avoid impacts to the convict-built stone causeway located underneath the former M2 bus ramp.

Design Environmental Manager

Design Manager

Design Review / Design Drawings

11. REMM P.10 Prior to the construction of the temporary embankment for the proposed M2 Motorway overbridge, the exposed portions of the causeway (that would not be protected by the culvert and retaining walls) would be covered with plastic sheeting so that the embankment can be easily removed following the completion of works, without any impacts to the stone. Excavations in the vicinity of the causeway would be supervised by a suitably qualified archaeologist to reduce the potential for accidental impact during construction.

Construction Environmental Manager/ Project Engineers

Toolbox Talks

Weekly Environmental Inspection Checklist


No. Requirement Mitigation Measure Timing Responsibility Tool12. CoA C27 The Proponent shall not, where feasible and reasonable,

physically affect the heritage listed causeway at Devlins Creek. The measures to protect the causeway during construction, management and remedial actions (if damage occurs) should be detailed under the Construction Heritage Management Plan (condition E32(e)).

Construction Environmental Manager/

Construction Manager/

Engineers

ECM/ Physical Protection/ Archaeologist Report / Refer to Section 14 of this plan

13. REMM P.7 The causeway over Devlins Creek would be fenced off during construction to assist in identifying its location on the ground and minimise potential accidental damage (except where the causeway is within the waterway).

Construction Project Engineer/ Site Foreman

Toolbox Talks

Weekly Environmental Inspection Checklist/ ECM

14. REMM P.3 Vibration monitoring would be undertaken to monitor vibration levels in the vicinity of the Devlins Creek causeway. Where levels are deemed to potentially result in impacts to the causeway, vibration intensive works would stop and an investigation undertaken to identify actions to minimise the vibration levels.


Vibration monitoring report/ ECM/ Table 5: Vibration Velocity Guide

15. REMM P.8 If any vibration damage to the causeway is identified, works are to stop while investigation of the damage and potential options to minimise further damage are undertaken. Should any damage to the causeway be identified, it is to be reported to the Heritage Council immediately.


Toolbox Talks

Weekly Environmental Inspection Checklist/ ECM

Beecroft Station16. REMM D.1 The adoption of architectural finishes consistent with the

existing, matching the existing head height with the Beecroft Station pedestrian subway structure, and archival recording of the portion of the subway which is to be upgraded.

Design

Pre-construction

Project Engineers / Designers

UDLP/ECM


No. Requirement Mitigation Measure Timing Responsibility Tool17. REMM D.1 The Statement of Heritage Impact contained in Technical

Paper 5 – Historic heritage would be forwarded to Hornsby Shire Council in accordance with Clause 14 of ISEPP for the Beecroft Station pedestrian subway structure.

Design

Pre-construction

Environmental Manager Formal correspondence containing the Technical Paper

18. CoA C30

REMM D.2

Archival recording of the former side platform and subway structure at Beecroft Station would be undertaken prior to works commencing in accordance with the NSW Heritage Council Guidelines. Transport for NSW would provide copies of the archival recording to Hornsby Shire Council for its records.

Design

Pre-construction

Environmental Manager Compliance Tracking Program

19. REMM D.3 RailCorp would be notified about the proposed impacts to the former side platform at Beecroft Station.

Pre-construction Environmental Manager Formal correspondence

20. REMM D.5 Interpretation signage would be installed at Beecroft Station to allow for the history and former platform configuration to be interpreted.

Pre-operation Environment Manager Compliance Tracking Program

21. REMM P.9 Measures would be implemented during construction to ensure the protection of the remaining Bunya Pines within the formal garden at Beecroft Station.

Pre-construction

Construction

Construction Manager

Environmental Co-ordinator

ECM/ Toolbox Talks

Weekly Environmental Inspection Checklist

Unidentified Aboriginal Heritage Finds22. REMM Q.1

TSR – E1

CoA 34 (e) (i) (III)

If Aboriginal objects are located during works, all works must stop in the vicinity of the find, Transport New South Wales and the NSW Office of Environment and Heritage, Metropolitan Local Aboriginal Land Council, Deerubbin Local Aboriginal Land Council and an archaeologist would be notified. Where required, further archaeological investigations would be undertaken before works recommence.

Construction Environmental Manager Unexpected Heritage or Skeletal Remains Find Procedure


No. Requirement Mitigation Measure Timing Responsibility Tool23. CoA E32 (e) (i) (III) The Unexpected Heritage or Skeletal Remains Find Procedure will

be enacted in the event previously unidentified Aboriginal objects are found in the corridor throughout the project.


Unidentified Historic Heritage Finds24. REMMs P.5

TSR – E1

Should any ‘relics’ be discovered during works, the NSW Heritage Council would be notified in accordance with Section 146 of the Heritage Act 1977.

Construction Environmental Manager

Project Archaeologist

Unexpected Heritage or Skeletal Remains Find Procedure

25. REMM P.6

CoA E34(e) (ii) V

If any unanticipated archaeological deposits are identified within the proposal site during construction, work likely to impact on the deposit would cease immediately and the Transport New South Wales, the NSW Heritage Council, Railcorp and an archaeologist would be contacted. Where required, further archaeological work and/or consents would be obtained prior to works recommencing at the location.

Construction Environmental Manager

Construction Manager

Unexpected Heritage or Skeletal Remains Find Procedure

26. CoA E34 (e) (ii) V The Unexpected Heritage or Skeletal Remains Find Procedure will be enacted in the event previously unidentified historic heritage items are found in the corridor throughout the project.



14 Devlins Creek Causeway Protection Plan

14.1. Construction

Causeway Protection measures will be completed in the following steps:

• Exotic vegetation (weeds) will be removed around the causeway for construction preparation.

• 3 x bitumen expansion plates will be installed at the side of the sandstone block for protection. Bitumen expansion plates will provide shock absorbing property for protection of the sandstone block (similar to that used between concrete joints on pedestrian pathways).

• 2 x layers of heavy duty geo fabric will be installed as the base layer.

• Heavy duty plastic membrane (Forticon) will be installed as the second layer, fully lapped and taped at all joints. This is to provide the first impermeable layer for the causeway.

• 50-200mm of stabilised sand will go in as the third layer, this will smooth out all the irregularity of the sandstone block alignment and provide an even and stable foundation for next layer of protection. Crack inducer plate will installed to enable easy decommissioning of the layer.

• Conveyor matting with taped joint will be installed to form an impermeable surface. This layer will also provide shock absorbing property for the causeway protection.

• No fines concrete will be installed on top of the conveyor matting as bedding. No fines concrete is porous which will allow water to flow through easily.

• 2 x box culverts (2200mm and 2500mm approximate) will sit on top of the no fines concrete bedding to provide a foundation above which more no fines concrete will be installed to create a suitable access.

• For the section of the causeway not covered by the culvert structure (area out of construction zone), environmental no go signage and fencing (where possible, given that it is an running watercourse) will be installed for demarcatione.

• All ETTT workers will be inducted and toolboxed onsite if working near the heritage causeway.

14.2. Monitoring

The following monitoring measures will be undertaken during construction works:

• Heritage archival recording has been undertaken by the project archaeologist in 2013.

• Project archaeologist will be onsite to supervise the installation of the protection measures, until they are satisfied that the works do not pose a risk to the causeway.


• Photographic recording of the causeway has commenced. 6 x photographic recording viewpoints have been established around the causeway. Recording is being completed on a monthly basis and post heavy rain event to make a record of any sandstone block movement.

• Vibration monitoring would be undertaken to monitor vibration levels when vibration generating equipment is working within distances that could result in impacts to the heritage item Table 5 of this plan details the vibration criteria.

• Weekly inspection of the area to ensure that protection measures are in place and are operating as intended.

14.3. Decommissioning

Decommissioning of the causeway protection measures will be completed in the following steps:

• Culverts will be lifted by crane onto trucks for offsite transportation.

• The no-fines concrete layer will be removed carefully with handheld jackhammer at the crack inducer plate locations.

• The conveyor matter layer will be peeled off by hand tools.

• Stabilised sand layer will be hand dig and removed with care. Light hammer drills may be required.

• Heavy duty plastic layer, geo fabric layer and bitumen plates will be peeled off careful by hand tools.

• Project archaeologist will supervise the decommissioning.


Causeway Protection Culverts


Annexure A – Heritage Management Plan Compliance Tracking Sheet

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