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 also involves the construction of two new underground stations at Aotea and Karangahape and a redeveloped Mt Eden Station (refer to Figure 1-1). The design and construction of the CRL infrastructure between the Aotea and Mt Eden Stations is being delivered by the Link Alliance (LA).

Figure 1-1: CRL Route and Location

This Construction Noise and Vibration Delivery Work Plan (CNV DWP) has been prepared in relation to the Mt Eden Main Works (“main works”).

This CNV DWP will become the overarching management document for all CRL constructions works in Mt Eden (excluding future public realm reinstatement works) –including enabling and early works that started before the main works.

1.1 Overview of CRL Works in Mt Eden

CRL works in the Mt Eden area involve the construction of the southern section of the tunnel structures and the tie-in of the CRL railway to the existing NAL, including the construction of the redeveloped Mt Eden Station. The Mt Eden Active Construction Zone (ACZ) and Construction Support Areas (CSAs) are 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 6 Operational activity required to support the tunnel boring machine (TBM) drive, including control room and plant, storage and spoil handling; Construction of a new Mt Eden Station building, incorporating passenger linkages between the new CRL platform and the modified existing NAL platform;

Mt Eden Main Works CNV DWP

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, including the Newton Junction Grade Separation Structure, the Eastern Facing Connection and the Western Facing Connection; Construction of a portal vent house building structure; Installation of retaining walls and utilities; 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 construction works in Mt Eden, works are being undertaken in a staged manner, involving:

Enabling and early works (demolition, network utility relocation and site establishment work) –early works have commenced and will continue to the end of 2020 Main construction works (construction of the underground CRL cut-and-cover tunnels, grade separation structures and trenches, station building and platforms, and tie-ins to the NAL) to commence mid-2020 through to mid-2023 Public realm reinstatement –likely from 2021 to early 2024

1.2 CNV DWP Staging

To reflect the staged construction approach for CRL in the Mt Eden area, a series of CNV DWPs are being prepared.

This CNV DWP addresses the potential noise and vibration exceedances related to the main works, which are detailed in the Construction Environmental Management Plan (CEMP) and summarised in Section 2 of this CNV DWP.

If required, a CNV DWP will also be prepared for the future public realm reinstatement.

1.3 Purpose of this CNV DWP

The purpose of this CNV DWP is to identify and provide for implementation of the Best Practicable Option (BPO) to avoid, remedy or mitigate adverse noise and vibration effects resulting from construction during the main works. These functions are required by CRL designation Condition 36.

It identifies the noise and vibration performance standards and details the management and control methodologies to be implemented in order to achieve compliance. Where compliance cannot practicably be achieved, it identifies BPO mitigation measures to be implemented on a site-specific basis, and general mitigation measures to be put in place as best practice.

This CNV DWP addresses the requirements of designation conditions 31 –40 for CRL Designation 2500-6 at Mt Eden and will be implemented throughout the entire construction period. It will be the primary tool for managing construction noise and vibration effects resulting from the main works.

This CNV DWP has been prepared in consultation with numerous stakeholders –noise and vibration receivers, the CRL Mana Whenua Forum, and the Mt Eden Community and Business Liaison Group –and has been reviewed by the Independent Peer Reviewer prior to submission to Auckland Council (as per CRL designation conditions 7 and 11).

Page 7 Mt Eden Main Works CNV DWP

Records of the consultation and review outcomes, including the Link Alliance’s response to matters raised, are included in Appendix E.

This CNV DWP has been prepared by the Link Alliance and forms part of the CEMP for the main works.

1.4 Relevant Conditions

Appendix B outlines the CRL designation conditions relevant to this CNV DWP and where they are addressed in the document.

CRL construction works at Mt Eden are being undertaken in both CRL Designation 2500-6 and KiwiRail’s Designation 6300 for the existing North Auckland Railway Line (NAL).

Construction occurring inside CRL Designation 2500-6 is governed by the CRL designation conditions, whereas construction in the existing railway corridor is governed by the NAL designation conditions. Because the construction activities in both CRL Designation 2500-6 and NAL Designation 6300 are often continuous or occur so closely to one another, any affected noise and vibration receivers could not tell them apart.

As a consequence, a pragmatic management approach has been adopted. The same triggers and management methodologies under the CRL designation conditions will be applied to works within the existing railway corridor, to ensure a consistent approach to managing all CRL construction noise and vibration effects at Mt Eden.

1.5 Sustainability

The Link Alliance is seeking an Infrastructure Sustainability Council of Australia (ISCA) Infrastructure Sustainability (IS) Rating for the main works. Further details can be found in the CEMP and Sustainability Management Plan. Main works sustainability requirements that relate directly to this CNV DWP are included in Appendix D. These requirements are imbedded within the Delivery Work Plans and Management Plans 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.

1.6 DWP Review and Updates

This CNV DWP is a live document that will be reviewed at least annually, or:

as a result of a material change to the main works to address unforeseen adverse noise and vibration effects arising from construction or unresolved complaints

Refer to sections 1.9 and 6.7 of the CEMP for further detail on the review and updating process.

Page 8 Mt Eden Main Works CNV DWP