Trees and Vegetation Delivery

Auckland City Rail Link In association with:

TREES AND VEGETATION DELIVERY WORK PLAN Connectus Document Ref: 025-Y033-2719 Revision: 06 1st June 2016

COMMERCIAL IN CONFIDENCE

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CONNECTUS PROJECT NO. 2719 CITY RAIL LINK LIMITED

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DOCUMENT INFORMATION Organisation:

Connectus

Document Title:

Trees and Vegetation Delivery Work Plan

Connectus Document Number

025-Y033-2719

Client:

City Rail Link Limited

Project:

CRL Enabling Works Contract 2

Location:

Auckland CBD

Project No:

2719

REVISION HISTORY Rev

Date

Details

Author

1

16/10/15

1ST Draft for Connectus

T. Lepper

C. Hind

01

21/10/15

2nd Draft sent as Rev 01 to AT

T. Lepper

C. Hind

02

30/10/15

Draft for Consultation

T. Lepper

C. Hind

03

26/11/15

Draft for peer review

T. Lepper

C. Hind

04

25/02/15

For AT and Connectus Revi ew, incorporating peer review comments and updated methodology

T. Lepper

C Hind

05

21/03/16

Final

T. Lepper

C Hind

06

01/06/16

Final – Review to incorporate Auckland Council comments

T. Lepper

C Hind

15/08/17

Annual Review – No Change

Reviewer

Approver

M. KerrRidge J. Suphlis

This document remains the property of Connectus. Its contents are confidential and shall not be reproduced, destroyed or given away without the express, written permission of Connects. The electronic version of this document in iTWOcx Database on designated server(s) is the Master Copy and is a controlled document. Unless specifically noted thereon, other copies of this document are uncontrolled.

CONNECTUS PROJECT NO. 2719 CITY RAIL LINK LIMITED

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CONNECTUS PROJECT NO. 2719 CITY RAIL LINK LIMITED

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GLOSSARY Term

Definition

ASR

Arboricultural Site Review

CEMP

Construction Environmental Management Plan

CEP

Construction Execution Procedure

CFA

Continuous Flight Auger

CLG

Community Liaison Group

CRL

City Rail Link

CSA

Construction Support Area

ESM

Environment and Sustainability Manager

IPR

Independent Peer Review

NoR

Notice of Requirement

TPZ

Tree Protection Zone

TV DWP

Trees and Vegetation Delivery Work Plan

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-2016

Table of Contents 1

2

INTRODUCTION ........................................................................................................................ 9 1.1

Objective of Trees and Vegetation DWP ............................................................................ 11

1.2

Designation Condition Requirements ................................................................................. 11

PROJECT DESCRIPTION........................................................................................................ 12 2.1

Summary of Methodolgy .................................................................................................... 12

3

ROLES AND RESPONSIBILITIES ............................................................................................ 13

4

AFFECTED TREES AND VEGETATION .................................................................................. 14 4.1

Trees Required to be Removed ......................................................................................... 14

4.1.1 5

6

Transplanting or Removal of Trees .............................................................................. 15

MITIGATION MEASURES ........................................................................................................ 18 5.1

Trees that are Required to be Removed ............................................................................ 18

5.2

Trees that are not Required to be Removed....................................................................... 18

5.2.1

Arboricultural Monitoring .............................................................................................. 18

5.2.2

Tree Specific Measures ............................................................................................... 19

CONSULTATION ..................................................................................................................... 22

APPENDIX A: RECORD OF CLG AND INDEPENDENT PEER REVIEW COMMENTS ................... 23

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-2016

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 in the vicinity of Mt Eden station. The works relating to this Trees and Vegetation Delivery Work Plan (TV DWP) constitute part of the enabling works for the CRL. The works (the Project) involve the construction of twin rail tunnels within the Albert Street road corridor from Customs Street West to Wyndham Street. The tunnels will be constructed using a staged cut and cover method and are expected to take 33 months to complete. Figure 1 outlines the extent of works for the Project.

This TV DWP has been prepared by AECOM New Zealand Limited (AECOM) and forms part of the Construction Environmental Management Plan (CEMP) for the Project. The majority of the trees within the Project area are required to be removed with the exception of one stand of trees on Lower Albert Street, three trees along Customs Street west, and one tree near Wolfe Street.

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-2016

Figure 1 Extent of Project Works

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-2016

1.1

OBJECTIVE OF TREES AND VEGETATION DWP

The purpose of this TV DWP is to manage adverse effects resulting from the removal of trees and vegetation during construction of the Project. Under CRL Designation condition 55.2 the objective of the TV DWP is to avoid the removal of scheduled trees as far as practicable. While there are no scheduled trees within the Project area, construction works will require the removal of trees and it is necessary to mitigate the adverse effects of construction on trees.

This TV DWP identifies: •

Trees that will require removal within the Project area;

•

Trees requiring protection from construction works;

•

Mitigation and planting plans; and

•

Monitoring and reporting requirements.

This TV DWP has been prepared in consultation with a Community Liaison Group (CLG) and has undergone Independent Peer Review (IPR) prior to submission to Auckland Council (as per designation conditions 7 and 11). A record of consultation outcomes (CLG and IPRP) is included in Appendix A.

1.2

DESIGNATION CONDITION REQUIREMENTS

Table 1 identifies the CRL designation conditions that specify what is to be addressed by the TV DWP, and in turn which sections of the TV DWP address these conditions.

Table 1 TV DWP conditions and the relevant sections of this document Condition Number

Condition

55.1

A Trees and Vegetation DWP shall be prepared to manage the adverse effects from the removal of trees and vegetation during the construction of the City Rail Link or any part of it.

55.2

The objective of the Trees and Vegetation DWP is to avoid the removal of scheduled trees as far as practicable. Where trees are identified for removal in surface works the Requiring Authority will remedy or mitigate the adverse effects of construction on trees and vegetation.

Relevant Section

1.1

To achieve the above objective the following shall be included in the Trees and Vegetation DWP and implemented as required: (a) Confirmation of the trees to be removed due to surface construction works and whether it is appropriate and feasible to relocate or store these trees for replanting. The removal of schedule trees which form a significant group should only be undertaken as a last resort; (b) A list of trees, which due to being located in proximity to construction works, have root systems and / or foliage within and / or overhanging the surface designation footprint, and the methods to be used, where practicable, to protect these trees from construction works; 55.3

(c) Cross references to the Urban Design DWP and the proposed mitigation of any tree / vegetation removal through replanting trees at a 1:1 ratio, re-instatement of the area, and other methods. In preparing the Trees and Vegetation DWP, the Requiring Authority shall seek input from the Auckland Council Parks Department with regard to tree species / vegetation selection, tree pit construction where deemed necessary, and the positioning of replacement trees, and from directly affected land owners with regards to preferences for any replacement planting for vegetation / trees removed from private property or for any replacement planting on private property;

CONNECTUS PROJECT NO. 2719 CITY RAIL LINK LIMITED

4.1

4.1

5

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-2016

Condition Number

Condition

Relevant Section

(d) Other methods to be used to monitor and report on the management of the adverse effects from tree / vegetation removal; and

5

(e) Cross references to the specific sections in the Communication and Consultation Plan which detail how the Auckland Council Parks Department, mana whenua (see condition 8) are consulted, and communication with the general public on the management of the adverse effects relating to the removal of trees and vegetation.

6

2 PROJECT DESCRIPTION This section presents a summary of the Project in relation to the matters required to be addressed by the TV DWP. A detailed description of the construction works in provided in the CEMP.

2.1

SUMMARY OF METHODOLGY

Connectus will use a cut and cover method to construct two parallel rail tunnels within the Albert Street road corridor between Customs Street and Wyndham Street. The total length of the tunnel for the Project will be 340m. A number of utilities are required to be removed, relocated, or supported prior to and during construction.

Generally, the Project works will consist of:

1. Piling and Capping Beam Construction within Albert Street Piling is required as the initial stage of construction for the Project. It includes the installation of cased continuous flight auger (CFA) piles and the construction of a pilecap on the western side of Albert Street. Figure 2 shows the location and staging of the piling.

Figure 2 Location of piling

2. Piling and road deck construction within the Customs Street Intersection; Piling and construction of a temporary deck structure at the Customs Street/Albert Street intersection will permit traffic to cross over, while tunnel construction occurs underneath. The deck will be constructed in four stages over approximately 10 months.

3. Trench Excavation The trench excavation will be carried out in layers, temporary struts and ground anchors will be installed as the depth increases. Excavation will occur within the extent of the Albert Street Road reserve from Customs Street to Wyndham Street. Spoil will be removed by trucks using a constructed steel traffic deck along the length of Albert Street.

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-2016

4. Construction of the rail tunnels The construction of the rail tunnels will be a rolling process with multiple work faces progressing simultaneously. The tunnel works will start at the southern end of Albert Street when the excavation plant is clear of the base of the tunnel.

5. Backfill of the trench As the construction of the tunnels progresses, back filling of the cut and cover excavation in the Custom Street Intersection and Albert Street trench will occur. Works to complete new utility routes or reinstate existing utilities will be co-ordinated with the filling operation as it reaches the upper layers.

Finally, the construction of the new permanent road pavement will occur in stages after the trench backfill has been completed.

6. Temporary Pavement Where required in order to maintain traffic movements, it will be necessary to put down a temporary pavement. Temporary pavements will consist of unbound granular material with a bituminous seal, concrete panels, or steel plates on the surface.

7. Public Realm Works On completion of the Project construction works, the Customs Street/Albert Street public realm will be re-established in accordance with the Urban Design Delivery Work Plan (Urban Design DWP) for the CRL enabling works. These works are covered under a separate Outline Plan process.

An appropriate urban design treatment is still being developed, and the Urban Design DWP will be finalised and submitted to AC prior to the Customs Street/Albert Street re-instatement works commencing. Amongst other things, the re-instatement works will include replacement planting to mitigate the effects of tree removal required by the CRL construction. Mitigation for tree removal will be provided by replanting trees at a ratio of at least 1:1, as required by the CRL designation conditions.

3 ROLES AND RESPONSIBILITIES The key personnel responsible for this TV DWP are identified in Table 2. However, all site personnel are responsible for following the requirements of the TV DWP. Table 2 TV DWP responsibilities

Organization

Title

Roles & Responsibilities

Connectus

Project Director

Overall responsibility for site environmental management.

Review and approve CEMP, including TV DWP and other sub-plans.

Cut and Cover Construction Manager

Reviewing and reporting on environmental performance.

Assess the requirement for odour monitoring.

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-2016

Organization

Subcontractors

Title

Roles & Responsibilities

Environment and Sustainability Manager (ESM)

Inspections, auditing and checking of environmental management practices and procedures.

On-site compliance with TV DWP, consent conditions and other requirements and tracking compliance information.

Inspection of works using Tree Management Checklist to assess tree health and compliance with the TV DWP. Report to Auckland Transport changes to construction techniques or natural environmental changes which require alterations to existing consents or new resource consents.

Prepare, review and update of CEMP, including TV DWP and other sub-plans.

Facilitate and oversee environmental monitoring. Update and maintain the environmental portion of the Project Risk Register.

Training of all staff including subcontractors.

Key contact for monitoring compliance. Attendance at monthly meetings with Connectus ‘Key contact’ and Auckland Council Consent Monitoring Officers.

Project & Site Engineers

Development, management and monitoring of Construction Execution Procedures (CEPs). Including sustainability incorporating environmental and requirements into the detailed CEPs developed on site.

Overseeing subcontractors.

Site Managers

Adherence to the CEMP and sub-plans, including TV DWP.

Site Arborist

Prepare Site Management Checklist for site use.

Undertake periodic Arboricultural Site Reviews. Provision of ad hoc advice as required.

4 AFFECTED TREES AND VEGETATION A Tree Assessment1 was prepared in August 2012 and formed part of the Notice of Requirement (NoR) for the CRL designations. The report found that while the Project will affect a number of trees that are located within the surface designation area, most of the affected trees are exotic street trees.

There are no scheduled trees within the Project footprint, or in proximity. Within the Project area, Albert Street is primarily planted as an evergreen magnolia lined-avenue. The report states that some of the smaller of these evergreen magnolia trees may be transplanted or relocated to temporary storage during construction, due to the ability of the evergreen magnolias to tolerate transplantation.

4.1

TREES REQUIRED TO BE REMOVED

The tree numbering system used in this plan is consistent with the Tree Assessment1 completed previously, however two trees are considered in this plan that were not considered in the tree assessment. These have been labelled X1 and X2. Figure 3 shows the existing trees within or in

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-2016

proximity to the Project footprint. Due to the nature of the Project, all trees that are within the construction footprint are required to be removed, including: trees G3, G4, T8, and T10, T11, T12, and T14-T26. In addition, trees G3 and G4 are in planter boxes which will be removed by the adjacent Precinct Properties Project.

Trees T6, G5, G7, X1, X2, T9, and T13 are within proximity of the Project works but do not need to be removed for the Albert Street Cut and Cover Works. Whilst G5, T6 and T13 will be unaffected, Trees T9, G7, X1 and X2 will need pruning and or protection from works. Table 3 summarises the requirements for each identified tree.

4.1.1

Transplanting or Removal of Trees

Where trees are in the path of construction works, consideration has been given to transplanting the trees to a new location instead of cutting them down. However, site investigations have shown that the root balls of many trees are tangled with underground utilities (power, water, communications, sewage etc.). As a result, it is impractical and unsafe to attempt to extract an intact root ball. Therefore, all trees scheduled for removal in Table 3 are required to be cut down to allow careful excavation and relocation of underground utilities.

Figure 3 Trees within or in close proximity to the project. Those circled red are to be removed.

1

Boffa Miskell, (2012). City Rail Link Tree Assessment. Report prepared for Auckland Transport, dated August 2012.

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Table 3 Trees affected by the Project

Tree ID

Common Tree Name

G3 Pohutukawa (4 trees)

Botanical Name

Scheduled

Tree Conditio n

Metrosideros excels

No

None – but removed by Precinct Properties Project None – but removed by Precinct Properties Project

Mitigation Properties

by

Precinct

Cordyline Australia

No

Good

Mitigation Properties

by

Precinct

G5 Queensland (4 trees) Box Gum

Lophostemon confertus

No

Good

No effect on trees

See Section 5.2.2

T6

Pohutukawa

Metrosideros excels

No

Good

No effect on tree

See Section 5.2.1

G7

Honey Locust

Gleditsia triacanthos

No

Good

Remove

X1

Honey Locust

Gleditsia triacanthos

No

Good

Remain; require pruning and protection from work in CSA5

Temporary fencing See Section 5.2.3

X2

Honey Locust

Gleditsia triacanthos

No

Good

Remain; require pruning and protection from work in CSA5

Temporary fencing See Section 5.2.3

T8

Evergreen Magnolia

Magnolia grandiflora

No

Good

Remove

No

Good

Remain; pruning will be required Remove

Transplant not possible (Interferes with vehicle tracking on Wolfe Street) Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remain

See Section 5.2.5

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Cabbage G4 (3 trees) Tree

T9 Italian Alder

Good

Mitigation Measures Project Effect

Alnus cordata

T10

Evergreen Magnolia

Magnolia grandiflora

No

Good

T11

Evergreen Magnolia

Magnolia grandiflora

No

Good

T12

Evergreen Magnolia

Magnolia grandiflora

No

Good

T13 Elm (6 trees) T14 Evergreen Magnolia

Ulmus sp.

No

Good

Magnolia grandiflora

No

Fair to Good

CONNECTUS PROJECT NO. 2719 CITY RAIL LINK LIMITED

Transplant not possible. Tree to be cut down and replaced through urban redesign

Transplant not possible. Tree to be cut down and replaced through urban redesign Temporary fencing See Section 5.2.4

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Common Tree Name

Botanical Name

T15

Evergreen Magnolia

Magnolia grandiflora

T16

Evergreen Magnolia

Magnolia grandiflora

No

Good

T17

Evergreen Magnolia

Magnolia grandiflora

No

Good

T18

Evergreen Magnolia

Magnolia grandiflora

No

Good

T19

Evergreen Magnolia

Magnolia grandiflora

No

Good

T20

Evergreen Magnolia

Magnolia grandiflora

No

Good

T21

Evergreen Magnolia

Magnolia grandiflora

No

Good

T22

Evergreen Magnolia

Magnolia grandiflora

No

Good

T23

Evergreen Magnolia

Magnolia grandiflora

No

Good

T24

Evergreen Magnolia

Magnolia grandiflora

No

Good

T25

Evergreen Magnolia

Magnolia grandiflora

No

Good

T26

Evergreen Magnolia

Magnolia grandiflora

No

Good

Tree ID

CONNECTUS PROJECT NO. 2719 CITY RAIL LINK LIMITED

Scheduled No

Tree Conditio n Good

Mitigation Measures Project Effect Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

Remove

Transplant not possible. Tree to be cut down and replaced through urban redesign

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5 MITIGATION MEASURES Due to the requirement to remove trees throughout the Project footprint, an adverse effect on the local treescape would result if no mitigation measures are implemented. In addition, mitigation measures will be put in place to protect trees labelled G5, G7, X1, X2 and T9 which are not required to be removed.

5.1

TREES THAT ARE REQUIRED TO BE REMOVED

Replacement planting will be required for all trees that are required to be removed, as identified in Figure 3. A replanting plan will be identified in the Project Urban Design DWP and will include (but may not be limited to) the following: •

Replanting of trees at least 1:1 ratio. Trees to be 4-5m height in ground, with single clear trunk to minimum 1.6m, trunk to be no less than 50mm in diameter at 300mm above ground, in good robust health with suitably sized root ball.

•

Area reinstatement.

•

The opportunity to include appropriate native species in the replacement and landscape plantings.

•

Documentation of the input from the Auckland Council Parks Department with regard to tree species / vegetation selection, tree pit construction and positioning of replacement trees.

•

An outline of the maintenance periods and responsibilities (i.e. the Requiring Authority for a period of five years for specimen trees and 3 years for all other landscape planting).

•

Consultation outputs (refer Section 6 of this TV DWP).

5.2

TREES THAT ARE NOT REQUIRED TO BE REMOVED

5.2.1

Arboricultural Monitoring

A suitably qualified and experienced arborist will be engaged to act as the Site Arborist for the Project.

The Site Arborist will be available (as required) to address any ad hoc issues that may arise in relation to tree health. The Site Arborist shall also undertake regular Arboricultural Site Reviews (ASR) at a period of no less than once every two months during any period for which works are to take place within 4 metres of the dripline of any tree(s) which will not be removed as part of the construction works. The ASR shall provide an opportunity to assess tree health of each of the trees which are to be retained, assess tree protection measures where provided, as well as providing general guidance to direct the preservation of tree health during the course of works.

The initial ASR should be undertaken at least 10 working days prior to the first commencement of work within 10 metres of any tree which is to be retained. The Site Arborist will prepare a Tree Management Checklist to be issued to the Environmental and Sustainability Manager (ESM) during the initial arboricultural site review to enable continuous monitoring of tree health in the intervals between each arboricultural site review. The Tree Management Checklist should include (but may not be limited to): •

Direction for assessing general tree health.

•

Direction to identify deterioration of tree health.

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•

Contact details for the Site Arborist.

The ESM will undertake periodic monitoring of tree health as prescribed by the Tree Management Checklist at periods of no less than once every 14 days, and evidence of this monitoring should be provided to the Site Arborist during each ASR. If the ESM identifies evidence of declining tree health, the Site Arborist should be engaged to provide assistance in determining the cause of such deterioration and provide direction where appropriate.

5.2.2

Tree Specific Measures

The following sections outline the proposed mitigation measures to be employed for the trees identified as remaining in Figure 3 and Table 3.

5.2.2.1

ID T6

The Pohutukawa Tree identified at T6 (Figure 4) is not expected to be affected by the Project and therefore will require no additional protection. It will remain in a public pedestrian space.

Tree health will be monitored regularly during construction. This will be undertaken in accordance with the periodic ASR and the regular tree health monitoring undertaken by the ESM. Figure 4 ID T6

5.2.2.2

ID G5

The group of trees identified as G5 (Figure 5) are not expected to be affected by the Project and therefore will require no additional protection. They will remain in a public pedestrian space.

Tree health will be monitored regularly during construction. This will be undertaken in accordance with the periodic ASR and the regular tree health monitoring undertaken by the ESM.

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Figure 5 ID G5

5.2.2.3

ID X1 and X2

The trees identified as X1 and X2 (Figure 6) sit on the periphery of the Project footprint. Pruning or tying back of branches that could interact with passing traffic and site offices is necessary. Any tree pruning will be kept to a minimum and will be undertaken by a qualified and experienced Arborist.

Whilst not envisaged to occur, should extensive pruning be required to remove the tree canopy of X1 or X2 that negatively affects their visual character, replacement planting may be provided as outlined in Section 4.1.

A protection fence will be erected between the construction works and the trees, however the trees will not be totally ring fenced as they remain in a public pedestrian area.

Tree health will be monitored regularly during construction. This will be undertaken in accordance with the periodic ASR and the regular tree health monitoring undertaken by the ESM. Figure 6 ID (right to left) X1 and X2

5.2.2.4

ID T9

The tree identified as T9 (Figure 7) sits on the periphery of the Project footprint and therefore will be mainly unaffected by construction works. However, pruning will be required to remove overhanging branches that could interact with passing construction vehicles. Any tree pruning required will be kept to a minimum and will be undertaken by a qualified and experienced Arborist.

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Tree health will be monitored regularly during construction. This will be undertaken in accordance with the periodic ASR and the regular tree health monitoring undertaken by the ESM. Figure 7 ID T9

5.2.2.5

ID T13

The six Elm trees identified as T13 are located between Swanson Street and Mills Lane and are within a long planter box (Figure 8). These trees sit on the periphery of the Project footprint and therefore will be mainly unaffected by construction works.

Tree health will be monitored regularly during construction. This will be undertaken in accordance with the periodic ASR and the regular tree health monitoring undertaken by the ESM. Figure 8 ID T13 – Six Elm trees (located in background of photo)

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6 CONSULTATION A Communication and Consultation Plan has been prepared for the Project works (Appendix O of the Project CEMP). Section 6 of this plan outlines the procedure undertaken in order to ensure that Connectus undertakes consultation with the Auckland Council Parks Department and Mana Whenua. It also details the general communication that will be undertaken with the general public on the management of the adverse effects relating to the removal of trees within the Project area. Where agreed, the feedback from this consultation process will be incorporated into the Project Urban Design Delivery Work Plan.

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APPENDIX A: RECORD OF CLG AND INDEPENDENT PEER REVIEW COMMENTS

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CLG COMMENTS No comments were received from the Community Liaison Group (CLG) regarding the Trees and Vegetation Delivery Work Plan.

Comment ID

Date

Time

Forum

Commenter Comment

Resolution

-

-

-

-

-

-

CONNECTUS PROJECT NO. 2719 CITY RAIL LINK LIMITED

-

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INDEPENDENT PEER REVIEW Peer Reviewer: Andrew Benson (Arborlab Consultancy Services Limited) th Date: 12 January 2016

Page 13

14-16

2

DWP Section 4.1

Table 3, and Figure 3

Paragraph/Sentence

Comment

"…all trees that are within the construction footprint are required to be removed, including trees G7, T8 and T10T26"

Fig 3, Table 1 and Sec 5.2.2 state that G7 is being retained.

-

Some trees have been omitted from the document.

Resolution 2 Error in text. G7 is to be retained . Text changed to read: “…all trees that are within the construction footprint are required to be removed, including: trees G3, G4, T8, and T10-T26.”

•

T13 is included in Table 3 as a single tree; there are six in total.

•

There is a mature pohutukawa a little to the south of G5 at the Customs St / Albert St intersection. The tree can be seen in Figure 4 on Page 18.

Text changed in Table three to indicate six elm trees identified as T13: “T13 (Six trees)” Table 3 and Figure 3 updated to include Pohutukawa tree (identified as T6 in Tree Assessment (2012) by Boffa Miskell). This tree will not be removed, but is far enough away from Project works to be unaffected.

A sub-section in 5.2 created to describe Project effect and mitigation measures for this tree.

14-16, 18

5.2.3 and Table 3

T9 is identified as Magnolia grandiflora. It is actually Alnus cordata

Correct. Tree Assessment (2012) by Boffa Miskell identifies T9 as Alnus cordata.

Text changed in Table to read ‘Alnus cordata’ in Botanical Name column for T9, and ‘Italian Alder’ in Common Name column

17-19

5.2.1, 5.2.2, “Tree health will be monitored regularly…by 5.2.2

Will the site manager be qualified to make an accurate assessment of a tree’s health? It would be

Due to the location of the trees, there is no prospect of the project works causing any

Note: It has subsequently been confirmed that G7 will be removed. As such the document has been amended accordingly.

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-20166

Page

DWP Section

Paragraph/Sentence the Site Manager”

Comment more appropriate to have this done by an arborist.

Resolution disturbance to the roots of the trees to be retained (T6, G5, G7, X1, X2, T9, T13, T27-T30).

Damage to trees can therefore only occur above surface level. Damage caused to trees above surface level will be obvious such as broken branches. Therefore, a qualified arborist is not required the closest tree to the excavation works is T9, and there is at least 5m from the face of the trench excavation to the closest point of the T9 canopy.

No change to this TV DWP

14-16, 18, 19

Section 5.2.3, Table 3 and Figure 3

-

It is unclear from the TV DWP why the small magnolia (T10) needs to be removed but the much larger alder (T9) is capable of being retained.

T10 is required to be removed in order for vehicle tracking to be maintained on Wolfe Street. T9 does not interfere with vehicle tracking and can therefore remain.

Text updated in T10 Mitigation Measures column: “Transplant not possible (Interferes with vehicle tracking on Wolfe Street).

Tree to be cut down and replaced through urban redesign”

14-16, 18

5.2.2, Table 3 and Figure 3

-

The canopies of these trees encroach into the carriageway quite significantly. An understanding of the pruning requirement would be helpful. IF the trees need to be pruned back to the kerb line for example, their visual character will be compromised and their contribution in this setting would be in question. A good long-term outcome could be reached by removing them should extensive pruning be required and providing replacements. This would need to be undertaken through liaison with AC Parks.

Text changed in Section 5.2.3 ID G7, X1 and X2: “Whilst not envisaged to occur, should extensive pruning be required to remove the tree canopy of G7, X1 or X2 that negatively affects their visual character, replacement planting may be provided as outlined in Section 4.1.”

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TREES AND VEGETATION DELIVERY WORK PLAN Doc No: 025-Y033-2719 REVISION: 06 DATE 01-June-20166

Page 14-16

DWP Section Table 3 and Figure 3

General

Paragraph/Sentence

Comment

Resolution

-

Tree G3 (pohutukawa x4). Three of these trees are potentially suitable for relocation. One has rotated at its base and is unlikely to prosper.

The four Pohutukawa identified as G3 do not affect this Project (C2) but are being removed by Precinct Properties. As such, the potential relocation of these trees and mitigation is the domain of Precinct Properties.

No change to this TV DWP

-

There needs to be some comments / recommendations in relation to the elms (T13) and the requirements under The Biosecurity Act (1993). How will this material (wood and soil) be dealt with in order to comply with these provisions?

Connectus confirms that the six Elm trees identified at T13 are not required to be removed and therefore specific provisions to remove Elm trees as part of the Project are not necessary.

Section 5.2.5 added, detailing the mitigation measures required for T13

General

-

Aside from protective fencing, other tree protection measures such as caring for roots are absent from the TV DWP. Is this level of detail required at this stage? Appointing an arborist before construction begins to coordinate works around trees seems appropriate. He / she could most likely prepare a site- s p e c i f i c tree protection plan if required.

The trees to be retained (T6, G5, G7, X1, X2, T9, T27-T30) will not have their roots disturbed due to the sufficient distance between the trees and the Project works. As a result, appointing a qualified arborist will not add additional value.

Since damage to trees below ground cannot occur, the only protection required for trees is above ground i.e. Protective fencing.

No change to this TV DWP

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