Mt Eden Enabling Works Historic Character Delivery Work Plan (Built Heritage Section) CRL-MTE-RME-LKA-PLN-800017
Revision: 000 Date: November 2019
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| Mt Eden Enabling Works
Historic Character Delivery Work Plan (Built Heritage Section)
Mt Eden Enabling Works Historic Character Delivery Work Plan (Built Heritage Section) CRL-MTE-RME-LKA-PLN-800017
This document is uncontrolled when printed. This document should be printed in colour
Revision Status Revision
Date
Version details
Prepared By
Approved By
Rev A00
27/9/2019
Draft for Community Liaison Group and Mana Whenua
Jane Matthews
Peter Roan
Rev A01
25/10/2019
Draft for Auckland Council and Independent Peer Review
Jane Matthews
Peter Roan
Rev 000
20/11/2019
Final for Submission
Jane Matthews
Peter Roan
Approval Status Name/Title
Signature
Date
Prepared by:
Jane Matthews Heritage Architect
20/11/2019
Reviewed by:
Aidan Kirkby-McLeod Link Alliance – Senior Planner
20/11/2019
Approved by:
Peter Roan Link Alliance – Consents Manager
20/11/2019
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Historic Character Delivery Work Plan (Built Heritage Section)
Table of contents 1. Introduction ............................................................................................. 5 1.1
Overview of CRL works in Mt Eden ................................................................................ 5
1.2
Purpose of the Historic Character DWP (Built Heritage Section) ...................................... 6
1.3
Relevant Conditions ...................................................................................................... 7
1.4
Sustainability ................................................................................................................ 9
1.5
DWP Review and updates............................................................................................ 10
2. Project Description ................................................................................ 11 2.1
Construction Methodology .......................................................................................... 11
3. Built Heritage Overview ......................................................................... 12 3.1
Location of Identified Built Heritage in proximity to the Mt Eden Enabling Works ......... 12
3.2
Historic Streetscape Elements...................................................................................... 12
3.3
Heritage Buildings Potentially Impacted by the Mt Eden Enabling Works ...................... 13
4. Management and Mitigation Measures ................................................. 15 4.1
Building Condition Surveys .......................................................................................... 15
4.1.1.
Pre-Construction Surveys .............................................................................................. 15
4.1.2.
Surveys during Construction ......................................................................................... 16
4.1.3.
Post Construction Surveys ............................................................................................ 16
4.1.4.
Building Record Strategy ............................................................................................... 16
4.2
Monitoring and Management Measures ...................................................................... 16
4.2.1.
Groundwater and Settlement Monitoring .................................................................... 16
4.2.2.
Vibration........................................................................................................................ 17
4.3
Historic Streetscape Elements...................................................................................... 17
4.4
Rectification Methodology .......................................................................................... 17
5. General Matters..................................................................................... 18 5.1
Communication and Consultation ................................................................................ 18
5.2
Key Personnel ............................................................................................................. 18
Appendix A: Record of CLG, IPR and Auckland Council Comments ............... 19 A1. CLG Comments ................................................................................................................ 19 A2. Independent Peer Review Comments .............................................................................. 19 A3. Auckland Council Comments............................................................................................ 19
Appendix B: ISCA Requirements................................................................... 21 Page 3
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Historic Character Delivery Work Plan (Built Heritage Section)
Appendix C: Staging Drawings...................................................................... 22 Appendix D: Historic Heritage and Special Character Buildings in Proximity to the Mt Eden Enabling Works ........................................................................ 23
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1.
Introduction
The City Rail Link (CRL) project comprises the construction, operation and maintenance of a 3.4 km underground passenger railway, running between Britomart Station and the North Auckland Rail Line (NAL) in the vicinity of Mt Eden Station. The CRL involves the construction of two new underground stations at Aotea and Karangahape, and a redeveloped station at Mt Eden (refer to Figure 1-1). The design and construction of the CRL infrastructure between Aotea and Mt Eden Stations is being delivered by the Link Alliance. This Historic Character Delivery Work Plan (Built Heritage Section) (HC DWP (Built Heritage Section)) has been prepared in relation to the Mt Eden Enabling Works (“the Project”).
Figure 1-1: CRL Route and Location
1.1 Overview of CRL works in Mt Eden The CRL works in the Mt Eden area involve the construction of the southern section of the tunnel structures and the tie-in to the existing NAL, including the construction of the redeveloped Mt Eden Station. The Mt Eden Active Construction Zone (ACZ) and Construction Support Area (CSA) is generally located between Nikau Street to the north, State Highway 1 (SH1) to the east, Dominion Road to the west and the existing NAL to the south. The works in this area include: • • • • • Page 5
Construction of an underground grade separation structure near Mt Eden Station; A new Mt Eden Station building incorporating passenger linkages; Modifications to the existing Mt Eden Station platforms; Road over rail bridges at Mt Eden Road, Normanby Road and Ruru Street with sections of road realignment; Grade separation structures for the existing and new rail lines to pass-over and connect with each other;
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Historic Character Delivery Work Plan (Built Heritage Section) • •
Pedestrian and cyclist bridge structures at Fenton Street and Porters Avenue; and New road linkages within the reinstated area post-construction.
Given the nature and scale of CRL works in Mt Eden, construction will be undertaken in a staged manner. This HC DWP (Built Heritage Section) only relates to the first stage of these works, the Mt Eden Enabling Works, as described in Section 2 below. Following completion of the Mt Eden Enabling Works, works in this area will involve: •
Main construction works – these works will include: Tunnel Boring Machine (TBM) operations, structure construction and waterproofing/tanking for cut and cover tunnels, utilities installation, retaining wall for Ruru street extension, construction of the rail line tieins including junctions and grade separation structures, realignment of the existing Western Line including platform reconstruction, grade separation of Normanby Road, pedestrian / cyclist bridges at Fenton and Porters, construction of the new station buildings. The Main Works will be undertaken from Mid 2020 through to 2024.
Public realm reinstatement – these works will involve establishing the final finishing and features that will comprise the completed Mt Eden Station and surrounds and will likely to be undertaken from 2021 to first quarter-2024.
1.2 Purpose of the Historic Character DWP (Built Heritage Section) This HC DWP (Built Heritage Section) has been prepared to identify measures that will be implemented to mitigate and manage the potential adverse effects on built heritage during the Mt Eden Enabling Works. The objective of the HC DWP (Built Heritage Section) is: •
to manage the adverse effects on built heritage that may result from associated works prior to, during, and after the construction of the City Rail Link or any part of it. The objective of the Built Heritage section is to avoid, remedy or mitigate adverse effects on built heritage as far as reasonably practicable.
This HC DWP (Built Heritage Section) addresses the requirements of CRL designation conditions 41 and 46 and will be implemented throughout the construction period. This HC DWP (Built Heritage Section) has considered buildings located in proximity to the Mt Eden Enabling Works which are recognised as having heritage and /or special character value as result of scheduling in the Auckland Unitary Plan Operative in Part (AUP), inclusion in the Upper Symonds Street Special Character Area or listing under the Heritage New Zealand Pouhere Taonga Act 2014. This HC DWP (Built Heritage Section) has been prepared in consultation with the Mt Eden Community and Business Liaison Group (CLG) and reviewed by Independent Peer Review (IPR) prior to submission to Auckland Council (as per designation conditions 7 and 11). This HC DWP (Built Heritage Section) has been prepared for the Link Alliance by Matthews & Matthews Architects Ltd and forms part of the Construction Environmental Management Plan (CEMP) for the Project.
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1.3 Relevant conditions Table 1.1 identifies the designation conditions relevant to this HC DWP (Built Heritage Section) and where they are addressed in the document. Table 1-1: Built Heritage and Archaeology conditions and location in Plan
Condition No.
Condition
Relevant section of DWP
41.11.141.1
A Historic Character DWP shall be prepared to manage the adverse effects on built heritage and archaeology that may result from associated works prior to, during, and after the construction of the City Rail Link or any part of it.
This document
41.2
The objective of the Built Heritage section is to avoid, remedy or mitigate adverse effects on built heritage as far as reasonably practicable.
This document
To achieve the above objective, the following shall, as a minimum, be included in the built heritage section of the Historic Character DWP: (a) Preparation of a Building Record and Salvage Strategy that outlines a suitable set of procedures for the removal, storage and for later refitting and reuse of elements of heritage buildings and/or structures identified for demolition including the Griffiths Building, Beresford Toilets, Bluestone Toilets, and the rear annex to the building at 223-227 Symonds Street.
N/A
(b) The proposed methods for monitoring building damage that is to be undertaken by a suitably qualified person for the duration of construction works. This includes confirming which Built Heritage buildings and structures are to be subject to a pre and post building condition survey through:
4.0
(i) Using the updated predicted vibration contours undertaken in Condition 36;
3.3 4.4.4
(ii) Reviewing those buildings in Appendix 2 to these conditions in accordance with Condition 46.1;
3.1, 3.3 Appendix D
(iii) Reviewing buildings within the designation footprint (including above sub-strata designation) or located in close proximity to identify buildings which have been recognised as having heritage value as a result of scheduling under the Historic Places Act 1993 [now the HNZPTA] or in the Auckland Unitary Plan.
3.1, Appendix D
(c) Identification and methodology for recording of Built Heritage directly affected by the construction or associated pre- and post-construction works (i.e. within the surface designation footprint), which cannot be retained and / or adaptively re-used / partially retained. For the avoidance of doubt, the following buildings and structures may be demolished: (i) Bluestone Toilets (SCDP Category B);
N/A
(ii) Beresford Toilets;
N/A 7.0
(iii) Rear annex to building at 229-231 Symonds Street; and
N/A
(iv) Griffiths Building.
N/A
(d) Identification and methodology for recording Built Heritage directly affected by the construction, or associated pre- and post-construction, which are to be:
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N/A
n/a
(i) Adaptively reused;
N/A A
(ii) Partially retained in design and construction; or
N/A
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Historic Character Delivery Work Plan (Built Heritage Section) (iii) Built heritage elements have been integrated into other elements of the City Rail.
N/A
(iv) In particular, the Requiring Authority shall explore the adaptive re-use of the buildings at 51-53 Victoria Street West (known as Martha’s Corner building) with complete demolition only considered as a last resort. As guidance, an appropriate level of adaptive re-use could include retention of the façade on all street frontages or the utilisation and incorporation of elements of the building into the design:
N/A
(e) How Built Heritage Buildings and Structures will be protected during construction through the use of screening or other protective measures to mitigate adverse construction effects;
6.
(f) How mitigation or rectification of damage to Built Heritage Buildings and Structures will be addressed; and
4.4
(g) Cross references to the specific sections in the Communication and Consultation Plan which detail how the Auckland Council Heritage Department, the New Zealand Historic Places Trust [now HNZPT], and mana whenua (see condition 15) are consulted, and the communication with the general public on the management of the adverse effects relating to Built Heritage.
5.1
Building Condition Surveys 46.1
Process for Building Condition Surveys Prior to construction, as a minimum those buildings listed in Appendix One and Appendix Two or identified pursuant to Condition 41.2(b) will be considered for a building condition survey. A building condition survey will be undertaken where it is assessed that there is potential for damage to buildings or structures arising from construction as determined by an independent suitably qualified person appointed by the Requiring Authority based on the criteria below unless the relevant industry criteria applied at the time or heightened building sensitivity or other inherent building vulnerability requires it. Building damage criteria will initially be assessed in accordance with Burland, J.B. (1997) “Assessment of Risk of Damage to Buildings due to Tunnelling and Excavation”. Additional factors which may be considered in determining whether a building condition survey will be undertaken include: (a) Age of the building; (b) Construction types; (c) Foundation types; (d) General building condition; (e) Proximity to any excavation; (f) Whether the building is earthquake prone; and (g) Whether any basements are present in the building.
46.2
Where prior to construction it is determined that a Building Condition Survey is required in accordance with Condition 46.1, or if measurements exceed the criteria in Condition 33: (a) The Requiring Authority shall employ a suitably qualified person to undertake the building condition surveys and that person shall be identified in the CEMP; (b) The Requiring Authority shall provide the building condition survey report to the relevant property owner within 15 working days of the survey being undertaken, and additionally it shall notify and provide the Auckland Council Consent Monitoring officer a copy of the completed survey report; (c) The Requiring Authority shall contact owners of those buildings and structures where a Building Condition Survey is to be undertaken to confirm the timing and methodology for undertaking a pre-construction condition assessment;
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4.1
Historic Character Delivery Work Plan (Built Heritage Section) (d) The Requiring Authority shall record all contact, correspondence and communication with owners and this shall be available on request for the Auckland Council Consent Monitoring Officer; (e) Should agreement from owners to enter property and undertake a condition assessment not be obtained within 3 months from first contact, then the Requiring Authority shall not be required under these designation conditions to undertake these assessments; (f) The Requiring Authority shall undertake a visual inspection during "active construction" if requested by the building owner where a pre-construction condition assessment has been undertaken. (g) The Requiring Authority shall develop a system of monitoring the condition of existing buildings which is commensurate with the type of the existing building and the proximity of the CRL works. The purpose of monitoring is to assess whether or not active construction is compromising the structural integrity of the building. (h) The Requiring Authority shall, during the Building Condition Survey, determine whether the building is classified as Commercial / Industrial / School or a Historic or sensitive structure in terms of Condition 33. 46.3
During construction: (a) The Requiring Authority shall implement procedures that will appropriately respond to the information received from the monitoring system. Where necessary this may include the temporary cessation of works in close proximity to the relevant building until such time as measures are implemented to avoid further damage or compromise of the structural integrity of the building.
54.1
(b) Any damage to buildings or structures shall be recorded and repaired by the Requiring Authority and costs associated with the repair will met by the Requiring Authority. 46.4
Following construction: (a) The Requiring Authority shall, within 12 months of the commencement of operation of the City Rail Link, contact owners of those buildings and structures where a Building Condition Survey was undertaken to confirm the need for undertaking a post-construction condition assessment;
4.1
(b) Where a post-construction building condition survey confirms that the building has deteriorated as the result of construction or operation works relating to the City Rail Link, the Requiring Authority shall, at its own cost, rectify the damage; and 46.5
Where the Requiring Authority is required to undertake building repairs in accordance with Conditions 46.3(b) or 46.4(b), such repairs shall be undertaken as soon as reasonably practicable and in consultation with the owner of the building.
4.17
1.4 Sustainability The Link Alliance is seeking an Infrastructure Sustainability Council of Australia (ISCA) Infrastructure Sustainability (IS) Rating. Further details can be found in the CEMP and Sustainability Rating Management Plan. Project sustainability requirements that relate directly to this HC DWP (Built Heritage Section) are included in Appendix B. These requirements are imbedded within this HC DWP (Built Heritage Section) to ensure that sustainability is a key focus and ‘the way we do things’. In some cases, the IS requirements and sustainability goals enhance the designation and consent requirements.
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Historic Character Delivery Work Plan (Built Heritage Section)
1.5 DWP review and updates This HC DWP (Built Heritage Section) is a live document that will be reviewed at least annually, or as a result of a material change to the project, or to address unforeseen adverse built heritage effects arising from construction, or unresolved complaints. Any material changes to the HC DWP (Built Heritage Section) must be approved by Auckland Council prior to any on-site activity reliant upon the change commencing. Refer to the CEMP for further detail on the review and updating process.
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Historic Character Delivery Work Plan (Built Heritage Section)
2.
Project Description
In order to launch the TBM and commence construction of the CRL tie-ins to the NAL, a range of ‘enabling’ works are proposed, which are the subject of this HC DWP (Built Heritage Section). These enabling works are described in detail in the CEMP. In summary, the Mt Eden Enabling Works involve: • • •
•
• • • •
Continuation of the demolition and clearance of the Mt Eden CSA (these works are authorised under the Mt Eden Demolitions Outline Plan) Set up of a temporary site office, which is anticipated to be a 2-3 storey modular building (likely made up of containers) located in the western extent of the CSA. Piling and excavation associated with the preparation of the portal. This will involve the demolition of the redundant stormwater shaft located in the portal area; the installation of bored piles and associated works (ground anchors and shotcrete) to support the excavation face; and removal of spoil. Bulk excavation to form what will become the rail trenches/cut and cover tunnels, which will also provide a ramp for the TBM to be manoeuvred into position. The excavation will encounter basalt, which is to be blasted in order to expedite the works and minimise the amount of rock-breaking required. In places, softer ground conditions are anticipated to be encountered, which may require the use of sheet piles. Local mined tunnelling to facilitate the TBM launch. Construction of the additional Mt Eden Road bridge (north of the existing bridge), including temporary diversion of shallow utilities in this location. Construction of the Ruru Street bridge, including diversion of the Huia 2 watermain in this location. Temporary and permanent utility diversions (such as water, wastewater, stormwater, Vector overhead cables and ducting, gas and communications) along Fenton Street, Porters Avenue, Haultain Street and Wynyard Street to provide adequate clearance between the Huia 2 watermain and NAL, associated retaining walls, and the proposed Fenton Street pedestrian bridge.
2.1 Construction Methodology The Project will be divided into stages as described in the CEMP.
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Historic Character Delivery Work Plan (Built Heritage Section)
3.
Built Heritage Overview
3.1 Location of Identified Built Heritage in proximity to the Mt Eden Enabling Works There are no identified historic heritage or special character buildings immediately adjacent to the Mt Eden Enabling Works area bound by Ruru Street, Nikau Street, Flower Street, Shaddock Street, Mt Eden Road and the existing NAL railway line. Identified built heritage in proximity to the Mt Eden Enabling Works includes those buildings that are near to the intersection of Mt Eden Road and New North Road which contribute to the Upper Symonds Street Special Character Area in the Auckland Unitary Plan and identified in the Upper Symonds Street Historic Area listed by Heritage New Zealand Pouhere Taonga (HNZPT). The temporary and permanent relocation of utilities required along Fenton Street, Porters Avenue, Haultain Street and Wynyard Street are close to, but do not directly affect, the adjacent residential area covered by the Special Character Area (Residential Isthmus A) Overlay Special Character area identified in the AUP. Buildings in proximity to the Mt Eden Enabling Works that have built heritage values and are potentially affected are identified in Section 3.3.
3.2 Historic Streetscape Elements Historic streetscape elements, including basalt kerbs, are evident in streets in the vicinity of the Mt Eden Enabling Works including in parts of Shaddock Street, Ruru Street and Nikau Street (refer to Figure 3-1).
Figure 3.1 Historic streetscape elements include basalt kerb blocks.
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Historic Character Delivery Work Plan (Built Heritage Section)
3.3 Heritage Buildings Potentially Impacted by the Mt Eden Enabling Works Historic heritage and special character properties within the limits of the vibration and settlement contours have been considered. Available maps showing built heritage potentially affected by vibration and settlement in proximity to the Mt Eden Enabling Works have been referred to, including: • •
Map 8 and 9 of 12, Appendix B, Built Heritage Technical Report, 2012 Auckland City Rail Link drawing; Settlement Contours and Building Assessment Mechanical and Consolidation Settlement Sheet 4 of 6 Approved Resource Consent Plan dated 17/11 2016, being part of the CRL Aotea to North Auckland Line regional resource consent.
Table 6-2 in the Construction Noise and Vibration Delivery Work Plan (CNV DWP) for the Mt Eden Enabling Works provides setback distances to comply with the cosmetic building damage vibration risk thresholds for heritage buildings. The largest risk radius is 30 metres. There are no scheduled or listed historic heritage buildings or special character buildings within 30 metres of the works. The vibration risk radii for equipment for the mined tunnel section are considered unlikely, but may have potential, to be relevant to heritage buildings above / close to the mined tunnel section. These buildings are identified in Appendix 2 of the CRL designation conditions and included in Table 3-1 below. Section 6.2 of the Groundwater and Settlement Monitoring and Contingency Plan (GSMCP) identifies structures that require building condition surveys close to the Mt Eden Enabling Works, including heritage / special character buildings at 1-13 Mt Eden Road and 10-14 New North Road. Historic heritage and special character buildings potentially impacted by vibration and settlement in proximity to Mt Eden Enabling Works, which require building condition surveys, are listed in Table 3-1 below (based on information in the CNV DWP and GSMCP as well as available drawings showing settlement contours; Auckland City Rail Link drawing; Settlement Contours and Building Assessment Mechanical and Consolidation Settlement Sheet 4 of 6 Approved Resource Consent Plan dated 17/11 2016.) Table 3-1: Heritage/ Special Character Buildings requiring condition surveys
Ref no. In Appendix 2 to Address/ Building Name CRL Designation Conditions 75
10-14 New North Road Villa Dalmacija (Settlement contours shown affecting this property; Settlement Contours and Building assessment Sheet 4 of 6; DRG 2613, Rev 4.0)
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Photo
Historic Character Delivery Work Plan (Built Heritage Section) Ref no. In Appendix 2 to Address/ Building Name CRL Designation Conditions 72
1-13 Mt Eden Road (Settlement Contours and Building assessment Sheet 4 of 6; DRG 2613, Rev 4.0) Vibration contours shown over this property Map 9 of 12 Appendix B, Built Heritage Technical Report, 2012)
73
15-17 Mt Eden Road (Vibration contours shown over this property Map 9 of 12 Appendix B, Built Heritage Technical Report, 2012 and settlement contours shown through rear of this property Settlement Contours and Building assessment Sheet 4 of 6; DRG 2613, Rev 4.0)
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Photo
Historic Character Delivery Work Plan (Built Heritage Section)
4.
Management and Mitigation Measures
Methods to be implemented during construction to mitigate and manage potential impacts on built heritage during the Mt Eden Enabling Works include: • • •
Building condition surveys prior to the commencement of works; Monitoring as set out in the CNV DWP and GSMCP; and Historic streetscape elements such as basalt kerbs should be removed and stored for reinstatement where practicable.
4.1 Building Condition Surveys 4.1.1. Pre-Construction Surveys Prior to construction, building condition surveys of heritage buildings identified in the CNV DWP and the GMSCP as being potentially impacted by the works listed above in Table 3-1 will be undertaken as part of these works. The condition assessments will ascertain any pre-existing damage to a building, existing structural distress, and any potential weakness of the structure’s foundations or structural elements, as well as non-structural damage. The condition surveys will form the basis for recording buildings and recording baseline information prior to works commencing. The building condition surveys will generally be undertaken as follows (in accordance with CRL designation condition 46): • •
The building surveys will be undertaken by an independent senior qualified person. The survey shall include: • • • • •
Any information about the type of foundations; Existing levels of damage (aesthetic, superficial, affecting levels of serviceability); Whether observed damage is associated with structural damage; Susceptibility of building or structure to further movement; and Photographic evidence.
With respect to built heritage, the pre-construction condition surveys will include, as appropriate: • •
• • •
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A survey of the exterior and interior of heritage buildings. A record of the condition of buildings using photographs, annotated drawings and written records, noting any existing signs of structural distress and damage or deterioration of a non-structural nature. Consideration of the stability of any elements, including applied decorative elements or features, and any fragile elements. Any recommended remediation to secure or mitigate potential problems prior to the commencement of construction. The location of all cracks greater than 2 mm in aperture width, which shall be recorded with a positional accuracy of +/- 200mm. Installation of grid crack monitors may be required on selected readily accessible cracks with an aperture width greater than 2 mm discussed above and as determined in consultation with the Built Heritage Specialist. | Mt Eden Enabling Works
Historic Character Delivery Work Plan (Built Heritage Section) The condition surveys shall generally include: •
• • • • • • • •
An introduction with overview of the premises, record of when the inspection was made, orientation notes for viewing photos and captions, summary of the scope of inspection, purpose of report and any limitations, any areas not accessed; A description of the property construction, based on a visual inspection and review of available architectural drawings and property information obtained from Council; A summary of existing damage and susceptibility to future damage; Site plan; Annotated plans, elevations and sections that relate to the photographic record; Floor plans if available; Burland building damage classification matrix; Pre-Construction Condition Schedule, with description, visible damage evident, damage category recorded and photograph reference; and Annotated photographs recording building condition. This should include general exterior and interior views as well as photographs of specific defects.
The pre-construction condition surveys will be reviewed by the Project Built Heritage Specialist, prior to works commencing.
4.1.2. Surveys during Construction As set out in the GSMCP, during-construction surveys will include visual inspections of the surrounding ground and external building facades of buildings for which pre-construction condition surveys are required adjacent to the works, to monitor any deterioration or movement of any preexisting cracks.
4.1.3. Post Construction Surveys Post-construction surveys shall comprise a repeat of the required elements of the pre-construction survey so that a direct comparison can be made. In accordance with CRL designation condition 46.4, building condition surveys of those buildings or structures that were subject to a pre-construction building condition survey may be undertaken post-construction of the enabling works. Where a post-construction building condition survey confirms a building has deteriorated as a result of the works, the damage shall be rectified by the Link Alliance.
4.1.4. Building Record Strategy No heritage or special character buildings are directly affected by the Mt Eden Enabling Works and therefore a salvage and building record strategy is not applicable.
4.2 Monitoring and Management Measures 4.2.1. Groundwater and Settlement Monitoring Based on the results of the pre-construction building condition surveys, and in accordance with the GSMCP, geotechnical and structural instrumentation will be installed in selected monitoring locations. Building Movement Monitoring Markers shall be located on identified buildings, with the property owner’s consent.
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Historic Character Delivery Work Plan (Built Heritage Section) The purpose of this instrumentation will be to measure/monitor any movement, settlement, tilt, strain and induced vibrations as a result of the works which may have the potential to adversely affect the structure. The instrumentation will be installed prior to starting the construction works. This will allow a period where initial readings and baseline monitoring readings from the instrumentation may be obtained, in order to provide baseline information. The proposed monitoring frequency and duration of the geotechnical and structural instrumentation installed on or near historic resources/structures is described in the GSMCP.
4.2.2. Vibration Vibration mitigation and management, based on a BPO approach will be implemented during the works as outlined in the CNV DWP, including appropriate management and monitoring of construction activities and equipment. Regular monitoring and assessment of the vibration measurements will determine the process to be followed and any required action to mitigate and manage any potential effects.
4.3 Historic Streetscape Elements Elements, such as basalt kerbs evident in parts of Shaddock Street, Ruru Street, Nikau Street, Mt Eden Road and New North Road, shall be carefully removed where required, prior to or during the works and stored for reinstatement at an appropriate time following the completion of works, as far as practicable.
4.4 Rectification Methodology The building condition surveys and assessments and monitoring/management methods outlined in this section of the HC DWP (Built Heritage Section) will be the vehicle for any discussion around the need for rectification works.
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5.
General Matters
5.1 Communication and Consultation Communication with HNZPT and Auckland Council Heritage Unit (Built Heritage and Implementation) will be undertaken to ensure that any issues can be addressed in a timely and transparent manner. This will cover regular updates on progress, periodic site visits, and in the event of unexpected finds or changes to agreed methodologies. Details of the communication are provided in the Mt Eden Enabling Works Communication and Consultation Plan.
5.2 Key Personnel Table 5-1 outline the key personnel involved in the implementation of this HC DWP (Built Heritage Section), including the Project Built Heritage Specialist, Auckland Council Heritage Unit and HNZPT and key Link Alliance personnel. Table 5-1: Contact Details
Role
Name
Project Built Heritage Specialist
Jane Matthews
Auckland Council Built Heritage Specialist
Dan Windwood
Auckland Council Compliance and Monitoring Officer
Timothy O’Grady
HNZPT Built Heritage Adviser
Robin Byron
Mt Eden Station Project Manager
Thibaut L’Hopital
Mt Eden Station Construction Manager
David Harris
Environmental and Sustainability Manager
Sarah Sutherland
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Historic Character Delivery Work Plan (Built Heritage Section)
Appendix A: Record of CLG, IPR and Auckland Council Comments A1. CLG Comments A Mt Eden CLG meeting was held on 8 October to discuss the enabling works and for the CLG to provide comments / feedback on the CEMP and sub-plans, including this HC DWP (Built Heritage Section). No comments were received from the CLG on this DWP.
A2. Independent Peer Review Comments An Independent Peer Review of the draft Historic Character Delivery Work Plan (Built Heritage Section) was undertaken by Jeremy Salmond from Salmond Reed Architects with peer review comments received on 30 October 2019. The comments received are as follows: Section of DWP / condition
Comment
Response
3.1
Correct reference to Table 4.1
Corrected
4.1.1
Spelling- construction
Corrected
4.1.4 Building record strategy
Clarify whether there are no heritage buildings affected, or whether the three buildings listed in Appendix D are listed as being adjacent, although outside the works area
Change made in 4.1.4 and in section 3.1 Clarified that no heritage buildings are directly impacted by the Mt Eden enabling works. The three buildings listed are outside the works area. Building condition surveys recommended for these to provide baseline information.
A3. Auckland Council Comments Mr Dan Windwood, Senior Specialist in Historic Character – Built Heritage, has reviewed and provided comment on the draft Historic Character – Built Heritage DWP as follows (email communication 13 November 2019):
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Historic Character Delivery Work Plan (Built Heritage Section) Section of DWP / condition
Comment
Response
4.0
While not identified at risk from vibration or settlement damage, the former Grafton Library at 2 Mount Eden Road and the adjacent Pumphouse face 1-25 Mount Eden Road and are both Category B scheduled historic heritage places in the AUP. While modelling currently indicates that these are considered safe from damage, care needs to be taken to avoid any unforeseen issues spreading unnoticed to two sites of heritage significance reasonably close to the site.
Baseline data and monitoring as set out in the CNV DWP and GSMCP will be used to verify the design analyses and respond appropriately.
Comments with regards to dwellings to be removed as part of the authorised demolition works; 6 Flower Street (villa): can temporary removal of the main section of the villa be considered, with long-term return to a location within the wider site?
Yes; the house at 6 Flower Street has been removed for potential reuse in a new location.
19 Shaddock Street (bungalow) and 31 Shaddock Street (Simplified English Cottage Bungalow)
Yes; materials have been salvaged as far as practicable during the removal of these houses including floor boards, weatherboards, and joinery.
Can a process of deconstruction rather than demolition be used to minimise the level of waste and allow for the reuse of native timber building materials elsewhere?
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It is not possible for it to be relocated back to the CRL site.
Historic Character Delivery Work Plan (Built Heritage Section)
Appendix B: ISCA Requirements Table A.1 identifies the ISCA Credit Requirements relevant to this HC DWP (Built Heritage Section) and where they are addressed in the document. Credit
Requirement*
Relevant Section of HC DWP (Built Heritage Section)
Other relevant Information / Comments
Heritage Assessment and Management Measures to minimise the adverse impacts to heritage during construction have been identified and implemented
3, 4, 5.
HER-1 Level 1
Community heritage values have been identified through consultation and integrated into studies.
3, Appendix D
HER-2
Monitoring of heritage is undertaken at appropriate intervals during construction and operation.
4
HER-1 Level 1
Level 1
Refer to the ISCA Rating Tool for full details of the requirements
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Communication and Consultation Plan
Historic Character Delivery Work Plan (Built Heritage Section)
Appendix C: Staging Drawings Refer to Appendix B of the CEMP.
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Historic Character Delivery Work Plan (Built Heritage Section)
Appendix D: Historic Heritage and Special Character Buildings in Proximity to the Mt Eden Enabling Works Information is provided below on those heritage and special character buildings in proximity to the Mt Eden enabling works within the limits of vibration and settlement contours as shown on available drawings including: • •
Map 8 and 9 of 12, Appendix B, Built Heritage Technical Report, 2012 Auckland City Rail Link drawing; Settlement Contours and Building Assessment Mechanical and Consolidation Settlement Sheet 4 of 6 Approved Resource Consent Plan dated 17/11 2016.
Ref no. In Appendix 2 to Address/ Building Name CRL Conditions
75
Photo
14 New North Road Villa Dalmacija
Legal Description (as given in Auckland Council Geomaps)
Lot 1 DP 46262
Auckland Unitary Plan (AUP) Schedule 14.1 AUP Upper Symonds Street Special Character Area
Identified as a Character Defining Building in the Upper Symonds Street Special Character Area
HNZPT
Upper Symonds Street Historic Area
The building was built c. 1930s (it is evident in the 1940 aerial on Auckland Council’s Geomaps) It was used as the Silknit NZ factory and warehouse. Silknit NZ made May Belle Lingerie and the building was named May Belle House
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Historic Character Delivery Work Plan (Built Heritage Section) Ref no. In Appendix 2 to Address/ Building Name CRL Conditions 72
Photo
1-13 Mt Eden Road
Legal Description (as given in Auckland Council Geomaps)
PT ALLOT 2 SEC 10 Suburbs Auckland
Auckland Unitary Plan (AUP) Schedule 14.1 AUP Upper Symonds Street Special Character Area
Identified as a Character Defining Building in the Upper Symonds Street Special Character Area
HNZPT
Upper Symonds Street Historic Area (List number 7367)
The building at the corner of Mt Eden Road was built in 1887 as the Eden Vine Hotel. Decorative parapets have been removed. (NZ Herald 12 03 1887, p. 5) Designed by Paul and Fripp architects, it replaced an earlier timber hotel on the site. (Auckland Star 6 02 1886, p.2, NZ Herald 23 December 1886, p5). The building was later occupied by a variety of shops and WH Tongue & Son undertakers. 73
15-17 Mt Eden Road
Legal Description (as given in Auckland Council Geomaps)
Pt Lot 20 DP 8545, Lot 19 DP 8545
Auckland Unitary Plan (AUP) Schedule 14.1
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AUP Upper Symonds Street Special Character Area
Identified as a Character Defining Building in the Upper Symonds Street Special Character Area
HNZPT
Upper Symonds Street Historic Area (List number 7367)
| Mt Eden Enabling Works