Contract No. HY/2011/03

Hong Kong-Zhuhai-Macao Bridge

Hong Kong Link Road

Section between Scenic Hill and Hong Kong Boundary Crossing Facilities

 

 

 

 

 

 

Landscape and Visual Plan

Rev.14

December 2020

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Main Contractor                                                                                   Designer

 

 



Contents

1.         Introduction. 1

1.1      Project Description. 1

1.2      Background. 2

1.3      Environmental Permit Conditions. 4

1.4      Purpose and Scope. 4

2.         Design Considerations. 6

2.1      Landscape and Visual Design Measures Considered. 6

2.2      Landscape and Visual Mitigation Measures during Construction and Operation Phases. 7

2.3      Landscape Design Considerations. 8

2.4      Other Landscape Design Considerations. 10

3          Design Concept 11

3.1      Overall Landscape Design Concept 11

3.2      Overall Aesthetic Design to Highway Maintenance Area (HMA) 11

3.3      Tunnel Portal at Scenic Hill 12

3.4      Tunnel Portal for HAT Tunnel 12

3.5      Bridge A1 and A2 of the HKLR. 12

3.6      Roadside Areas within the Secure Area of the HKLR. 13

3.7      Detail Mitigation Measures. 13

4.         Adopted Design Measures. 14

4.1     Landscape and Visual Design Measures. 14

4.2     Landscape Recourses, Landscape Characters Areas and Visually Sensitive Receivers under this Project 15

4.3     Mitigation Measures during Detailed Design Stage. 16

4.4     Mitigation Measures during Construction Phase and Operation Phase. 23

4.5     Maintenance and Management 29

5          Summary. 32

 

 

 


 

List of Appendices

 

Appendix A ¡V Mitigation Measures Plan: Mitigation Measures During Detailed Design Stage

Appendix B ¡V Mitigation Measures Plan: Mitigation Measures During Construction and Operation Phases

Appendix C ¡V Detail Mitigation Measures Blow-up Plans during Detailed Design Stage and Compensation Plans

Appendix D ¡V Detail Mitigation Measures Blow-up Plans during Construction and Operation Phases

Appendix E ¡V Planting Requirements of the HKIA Approved Plant Species List (APSL)

Appendix F ¡V Scope of Works for Contract No. HY/2011/03

Appendix G ¡V Tree Preservation and Protection

Appendix H ¡V Recipient Locations of Transplanted Trees

Appendix I ¡V Maintenance Demarcation of Soft Landscape Works

Appendix J ¡V List of Landscape Resources (LRs) and Landscape Characters Areas (LCAs)

Appendix K ¡V List of Visually Sensitive Receivers (VSRs)

Appendix L ¡V Photomontages of Visually Sensitive Receivers (VSRs)

Appendix M ¡V AAHK¡¦s FEP No. FEP-01/352/2009/D

Appendix N¡V Implementation Schedule of Mitigation Measures on Landscape & Visual Impact

 

 


 

List of Tables

 

Table 4.1:         General Mitigation Measures

Table 4.2:        Mitigation Measures during Detailed Design Stage

Table 4.3:         Mitigation Measures during Construction Phase and Operation Phase

 

Table 4.4:        Landscape Works Schedule of Management and Maintenance Responsibilities

 

Table 4.5:     Hard Landscape Maintenance Principles

 

Table 4.6:     Soft Landscape Maintenance Principles

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nomenclature and Abbreviations

 

AAHK

Airport Authority Hong Kong

ACABAS

Appearance of Bridges and Associated Structures

CNAC

China National Aviation Corporation

EM&A

Environmental Monitoring & Audit

HKBCF

HKIA

HZMB Hong Kong Boundary Crossing Facilities

Hong Kong International Airport

HKLR

HZMB Hong Kong Link Road

HMA

Highway Operation and Maintenance Area

HyD

Highways Department

HyD/LU

HZMB

LandsD

Highways Department Landscape Unit

Hong Kong-Zhuhai-Macao Bridge

Lands Department

LCSD

Leisure and Cultural Services Department

TCSS

Traffic Control & Surveillance System

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


1.                Introduction

1.1       Project Description

1.1.1     The Works in Contract No. HY/2011/03 (hereunder referred as ¡§this Contract¡¨ are covered under two designated projects, namely ¡§Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road (HKLR)¡¨ and ¡§Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities (HKBCF)¡¨, under Schedule 2 of the Environmental Impact Assessment (EIA) Ordinance (Cap 499). Its construction and operation shall be governed by the relevant Environmental Permits (EPs) issued by the Director of Environmental Protection (DEP).

1.1.2     The Works under this Contract mainly comprises the design and construction of the following scopes:-

(a)    New reclamation along the east coast of the Hong Kong International Airport (HKIA), of approximately 23 hectares;

(b)    Tunnel SHT from Scenic Hill to the new reclamation, of approximately 1 km in length with 3 lanes for east bound carriageway heading to HKBCF and 4 lanes for westbound carriageway heading to the HZMB Main Bridge;

(c)    An abutment of the viaduct portion of the HKLR at the west portal of Tunnel SHT and associated roadworks at west portal of Tunnel SHT;

(d)    An at-grade road on the new reclamation along the east coast of the HKIA to connect with the HKBCF, of approximately 1.6 km along dual 3-lane carriageway with hard shoulder for each bound;

(e)    Roadlinks between the HKBCF and the HKIA including new roads and modification of existing roads in the HKIA, involving viaducts, at-grade roads and Tunnel HAT;

(f)     A highway operation and maintenance area (HMA) located on the new reclamation at south of Dragonair Headquarters Building, including construction of buildings, connection roads and other associated facilities;

(g)    Associated civil, structural, building, geotechnical, marine, environmental protection, landscaping, drainage and sewerage, tunnel and highway electrical and mechanical works, together with installation of street lightings, traffic aids and sign gantries, water mains and fire hydrants, provision of facilities for installation of traffic control and surveillance system (TCSS), reprovisioning works of affected existing facilities, implementation of transplanting, compensatory planting and protection of existing trees, and implementation of an environmental monitoring and audit (EM&A) programme.


 

1.2       Background

1.2.1    As this Contract are covered under two designated projects, i.e. HKLR and HKBCF, the current Environmental Permit Nos. EP-352/2009/D and EP-353/2009/K for HKLR and HKBCF were issued on 22 December 2014 and 11 April 2016 respectively. These documents are available through the EIA Ordinance Register. Please refer to Appendix F for the respective scope of Works under EP-352/2009/D (for HKLR) and EP-353/2009/K (for HKBCF).

Scope of Works for Contract HY/2011/03 covered under EP-352/2009/D (EP for HKLR)

Scope of Works for Contract HY/2011/03 covered under EP-353/2009/K (EP for HKLR) (Area in Pink)

 

1.2.2     To facilitate AAHK¡¦s future development, AAHK has undertaken a portion of landscape area at Kwo Lo Wan Road via Further Environmental Permit No. FEP-01/352/2009/D issued by EPD on 29 March 2018.  The associated EM&A requirements on landscape monitoring originally required under HyD¡¦s EP no. EP-352/2009/D would be transferred to AAHK via this FEP.  A copy of FEP-01/352/2009/D issued by EPD is attached in Appendix M.

 

1.2.3  AAHK has also undertaken another portion of landscape area (including hard paving) along Tung Wing Road and Chek Lap Kok Road for the construction of AAHK¡¦s Primary Access Road Dynamic Signs (PARDS) and Car Park Availability Display (CPAD) system. The associated EM&A requirements on landscape monitoring originally required under HyD¡¦s EP no. EP-352/2009/D would be transferred to AAHK under the same FEP No. FEP-01/352/2009/D as mentioned in Para. 1.2.2 above.

 

1.2.4  Please refer to Appendix A and Appendix B showing the locations of the concerned landscape areas handed over to AAHK under Further Environmental Permit FEP-01/352/2009/D mentioned in above Para. 1.2.2 and Para. 1.2.3.

 

 

 

1.3       Environmental Permit Conditions

1.3.1     According to EP, Landscape and Visual Plan should be submitted to fulfil the EP conditions:

a)  Condition from EP No. EP-352/2009/D (EP for HKLR):

Item 2.11 Landscape and Visual Plan

The Permit Holder shall deposit with the Director, at least one month before the commencement of the construction of each relevant part of the Project, three hard copies and one electronic copy of a landscape and visual plan incorporating measures, including aesthetic design on the viaduct, tunnel portals, at-grade roads and reclamation and visually neutral/recessive colour scheme for construction of offshore structures and night-time lighting control.

 

b)   Condition from EP No. EP-353/2009/K (EP for HKBCF):

Item 2.9 Landscape and Visual Plan

The Permit Holder shall deposit with the Director, at least 1 month before the commencement of  construction of relevant part of the Project, three hard copies and one electronic copy of a landscape and visual plan incorporating aesthetic architectural design on buildings structures and related infrastructure of the Project, streetscape elements, planting proposals and other measures including night-time lighting control.

 

1.3.2    The overall design is based on the Employer¡¦s Requirements, HKIP Approved Plant Species List (APSL) and the approved EIA Report Section 14.3 Landscape and Visual Impact Assessment. The relevant mitigation measures accordingly need to comply with the Employer¡¦s Requirements, HKIA APSL and the approved EIA Report.

1.4       Purpose and Scope

1.4.1    The Landscape and Visual Plan (LVP) for this Contract aims to illustrate the fulfilment of the mitigation measures during the detail design stage, construction phase and operation phase in accordance to Section 14 of the approved EIA Report and associated EM&A Manual.

           

            The mitigation measures stated in the LVP are based on the following items of the approved EIA Report:

 

Ø  Item 14.3.3.1 Minimization and avoidance as Mitigation Measures During Detailed Design Stage

Ø  Item 14.3.3.2 Design Measures as Mitigation Measures During Detailed Design Stage

Ø  Item 14.3.3.3 Mitigation Measure / Strategies to be applied in the Construction Phase and the Operation Phase

 

 

1.4.2    The LVP will demonstrate the relevant mitigation measures implemented under this Contract which are indicated in the below figures:

 

a) Mitigation Measures during Detailed Design Stage ¡V Drawing No. 001M Mitigation Measures Plan: for measures stated in Approved EIA Report - Section 14.3.3.2 (Appendix A);

 

b) Mitigation Measures during Construction Phase and Operation Phase ¡V Drawing No 002M Mitigation Measures Plan: for measures stated in Approved EIA Report - Section 14.3.3.3 (Appendix B); and

 

c) Recommended Landscape and Visual Mitigation Measures for visually sensitive receivers (VSRs) (Appendix L).

 

            The proposed mitigation measures for each of the landscape resources (LRs) and landscape character areas (LCAs) are described Tables 4.2 and 4.3 in Section 4.2.

 

1.4.3      With respect to the requirements of Environmental Permit, the LVP has been organised to present the following particulars under this Contract:

Chapter 2 ¡V Design Consideration:

-      Provides an update of the Design Codes, Design Parameters and Assumptions.

Chapter 3 ¡V Design Conceptual Approach:

-      Provides design descriptions of the works incorporating mitigation measures during construction and operation phases for the works required to construct the landscape areas including woodland buffer zone, roadside planters,  maintenance access paths, irrigation and drainage systems for landscape works.

Chapter 4 ¡V Adopted Mitigation Measures:

-      The proposed mitigation measures are indicated in Table 4.2 and Table 4.3, which follow the recommended mitigation measures stated in the Approved EIA Report.

Chapter 5 ¡V Summary

 


 

2.                Design Considerations

2.1       Landscape and Visual Design Measures Considered

2.1.1      The design requirements for the landscape and visual mitigation measures during detailed design stage were stated in Section 14.3 of the approved EIA Report and Section 14.2.4 of the EM&A Manual. These mitigation measures are considered during the detailed design stage and will be adopted during construction as far as practicable.

 

2.1.2      The relevant design concept will be discussed in Section 3 of this LVP, while the mitigation measures during construction and operation phases will be elaborated in Section 4 of this LVP. The design measures extracted from Section 14.3.3.2 of the approved EIA Report are listed below for easy reference:

 

 

2.1.3    During Detailed Design Stage:

 

Ø  Item 1: Roadside planting and planting along the edge of the reclamation is proposed;

 

Ø  Item 2: Transplanting of mature trees in good health and amenity value where appropriate and reinstatement of areas disturbed during construction by compensatory hydro-seeding and planting;

 

Ø  Item 3: Protection measures for the trees to be retained during construction activities;

 

Ø  Item 4: Optimizing the sizes and spacing of the bridge columns;

 

Ø  Item 5: Fine-tuning the location of the bridge columns to avoid visually-sensitive locations;

 

Ø  Item 6: Aesthetic design of the bridge form and its structural elements for HKLR, e.g. parapet, soffit, columns, lightings and so on;

 

Ø  Item 7: Considering the decorative urban design elements for HKLR, e.g. decorative road lightings;

 

Ø  Item 8: Maximizing new tree, shrub and other vegetation planting to compensate tree felled and vegetation removed;

 

Ø  Item 9: Providing planting area around peripheral of HKLR and HKBCF for tree planting screening effect;

 

Ø  Item 10: Providing salt-tolerant native trees along the planter strip at affected seawall and newly reclaimed coastline;

 

Ø  Item 11: For HKBCF, providing aesthetic architectural design on the related buildings (e.g. similar materials for PCB building facade to Airport buildings, roof planting and subtle materials for other facilities buildings and so on), and the related infrastructure (e.g. parapet planting and transparent cover for elevated footbridges) to provide harmonic atmosphere of the HKBCF; (Remark: Not applicable to this Contract)

 

Ø  Item 12: Fine-tuning the sizes of the structural members to minimize the bulkiness of buildings and adjustment of building arrangement to minimise disturbance to surrounding vegetation in the HKBCF; (Remark: Not applicable to this Contract)

 

Ø  Item 13: For HKLR, providing aesthetic design on the viaduct, tunnel portals, at grade roads and reclamation (e.g. subtle colour tone and slim form for viaduct to minimize the bulkiness of the structure and to blend the viaduct better with the background environment, featured form of tunnel portals, roadside planting along at-grade roads and landscape berm on & planting along edge of reclamation area) to beautify the HKLR alignment.

2.2       Landscape and Visual Mitigation Measures during Construction and Operation Phases

2.2.1      The landscape and visual design measures during construction and operation phase extracted from Section 14.3.3.3 of the approved EIA Report are listed in below for easy reference.

 

2.2.2    During Construction Phase:

Ø  G1: Grass-hydroseed bare soil surface and stock pile areas.

Ø  G2: Add planting strip and automatic irrigation system of appropriate at some portions of bridge or footbridge to screen bridge and traffic.

Ø  G3: For HKLR, providing aesthetic design on the viaduct, tunnel portals, at-grade roads and reclamation (e.g. subtle colour tone and slim form for viaduct, aesthetic design of the bridge form and its structural elements including the parapet, soffit, columns and so on and decorative urban design elements and lightings for the HKLR; featured form of tunnel portals, roadside planting along at-grade roads and landscape berm on & planting along edge of reclamation area) to beautify the HKLR alignment.

Ø  G4: For HKBCF, providing aesthetic architectural design on the related buildings (e.g. similar materials for PCB building facade to Airport buildings, roof planting and subtle materials for other facilities buildings and so on), and the related infrastructure (e.g. parapet planting and transparent cover for elevated footbridges) to provide harmonic atmosphere of the HKBCF (Remark: Not applicable to this Contract)

Ø  G5: Vegetation reinstatement and upgrading to disturbed areas.

Ø  G6: Maximize new tree, shrub and other vegetation planting to compensate tree felled and vegetation removed.

Ø  G7: Provide planting area around peripheral of and within HKBCF and HKLR for tree screening buffer effect.

Ø  G8: Plant salt tolerant native tree and shrubs etc along the planter strip at affected seawall.

Ø  G9: Reserve of loose natural granite rocks for re-use.  Provide new coastline to adopt ¡§natural-look¡¨ by means of using armour rocks in the form of natural rock materials and planting strip area accommodating screen buffer to enhance ¡§natural-look¡¨ of the new coastline

Ø  V1: Minimize time for construction activities during construction period.

Ø  V2: Provide screen hoarding at the portion of the project site / works areas / storage areas near VSRs who have close low-level views to the Project during HKLR & HKBCF construction.

 

2.2.3  During Operation Phase:

Ø  G10: Provide proper planting maintenance on the new planting areas to enhance the aesthetic degree.

Ø  V3: Lighting design to minimize glare at night.  Decorative road lighting to be considered during detailed design stage.

 

2.3       Landscape Design Considerations

2.3.1        Since HKLR is located adjacent to the Hong Kong International Airport (HKIA) and underneath the air-flight route, the landscape design for this Contract shall be designed in accordance to the HKIA Approved Plant Species List (APSL) (Revision 4.0.1: October 2015) (Appendix E).

 

2.3.2        According to the zoning plan of the Airport Island shown in Figure 1 of the HKIA APSL (Revision 4.0.1: October 2015), the works areas under this Contract fall within Zone 1, Zone 2 and Zone 3.

 

2.3.3        During the detailed design stage, the landscape designs of this Contract are required to comply with the aforesaid planting restrictions and the relevant planting limitations are extracted below for easy reference:-

 

Zone 1:

Only grass and ground cover of less than 200mm in height; climbers that do not produce fleshy fruit and should be planted in areas not exceeding 25m2 and regularly pruned shrubs that do not produce fleshy fruit and are of less than 1.5m in height and 25m2 in area size are allowed.

NB (It was agreed during various interface meetings between HyD, CAD and AAHK that the height requirement for shrubs in Zone 1 and Zone 2 covered by the HKBCF and associated link road projects can be relaxed from 1.5m to 2m in height).

 

Zone 2:

Climbers, palms, cycad, trees or shrubs are acceptable only if they do not produce fleshy fruit.  As a precautionary measure, height restriction of newly planted palms, cycad and tree is normally 5-10m, and trees that could produce a spreading crown and/or develop into a tall structure shall be avoided. Hence, selection of small trees is preferred as a long-term management and maintenance approach. For all existing, planted palms, cycad and trees, their suitability and horticultural maintenance practice will be regularly reviewed by AAHK, and will be monitored for bird activities and potential hazard to aircraft by AA¡¦s Wildlife Hazard Consultant. Given that the mature size of certain existing tree species (such as Casuarina equisetifolia and Delonix regia) is up to 10-15m, close monitoring on their bird attractiveness of these particular trees would be carried out. Height restriction of existing and newly-planted shrubs is 1.5m.

For initial planting, palm / cycad / ravenala / bamboo / tree should be in groups of 50 individuals or fewer. The area of each tree group should not exceed 150m2 and shrubs / climbers should be planted in areas of no more than 500m2. Routine horticultural maintenance should be carried out to maintain vegetation groups of smaller sizes as far as practical.

For all existing, planted palm / cycad / ravenala bamboo / trees as well as shrubs are monitored by AA¡¦s Wildlife Hazard Consultant for usage by birds, and by AAHK. The planted area can be no more than 500 m2 for palm / cycad / ravenala / bamboo / trees and 1,000m2 for shrubs / climbers. The linear segregation for adjacent groups of palms / cycad / ravenala / bamboo / trees / shrubs should be at least 50m; however, this segregation restriction can be relaxed if the plantation is assessed as not creating significant or hazardous attraction to birds by AA¡¦s Wildlife Hazard Consultant. Spread of tree crowns should be pruned to less than 3m for initial planting, and 6m for mature plants on the condition that the tree species does not produce fleshy fruits and that bird usage is monitored by AA¡¦s Wildlife Hazard Consultant.

 

Zone 3:

In general, there is no restriction on the species planted in this zone. Trees, shrubs and palms are allowed. Large trees with complex structure encouraging birds¡¦ foraging and perching should be monitored for bird visitation. Existing plant species with fleshy fruits should also be monitored for bird attraction. In addition to streamline long-term management and maintenance, planting of large groups of trees/ palms/ cycad/ ravenala that set fleshy fruits in the planting areas close to Zone 2 should be avoided.

 

2.4       Other Landscape Design Considerations

2.4.1    According to the HKIA APSL, trees are not allowed for planting within Zone 1, for those landscape areas fall within Zone 2 and Zone 3, the following constraints should be observed:-

Ø   The limitations of space afforded between the Hong Kong Link Road and the other maintenance and access roads.

Ø   The design and aesthetics strategy approved by the ACABAS.

Ø   The existing planting structure and aesthetic of land within the HKIA lot.

Ø   The location and disposition of significant underground structures and utilities.

Ø   The limitations of space afforded between the HK Link Road and the seawall.

Ø   Limited accessibility for maintenance and waterfront access.


 

3       Design Concept

3.1       Overall Landscape Design Concept

3.1.1     To cater the aforesaid constraints, the overall landscape design concept aims to achieve and resolve the constraints with the following goals:-

Ø   Develop a localised and differentiated landscape aesthetics strategy for the project with a strong ¡¥gateway¡¦ design theme which unifies the development.

Ø   Seamlessly blend the new development within the context of both the existing urbanised airport fabric and the naturalised environment of Scenic Hill.

Ø   Marry with the aesthetics of the Administration Building whilst relating to other surrounding buildings, particularly CNAC Tower.

Ø   Consider and implement international solutions in developing pragmatic, sensitive and sustainable design that achieves the best social, economic and environmental fit.

Ø   Address the difficulties of site location and microclimate.

Ø   Incorporate sustainable water management practices.

Ø   Minimise long term maintenance implications in additional to reducing capital costs.

3. 2      Overall Aesthetic Design to Highway Maintenance Area (HMA)

3.2.1    The collection of buildings at the HMA takes on various scales, with the Administration Building and the Workshops being the largest. The architectural design approach for these buildings reflects a high awareness of their utilitarian nature and functions. The connection of the 3 cities, Hong Kong, Zhuhai, and Macau is symbolized by 3 feature walls apparently slicing through the Administration Building, providing accents and articulation for a long massive building.

3.2.2    The building mass organized around these 3 walls is simply clad in curtain wall or louver panels, an expression responsive to the CNAC/Dragonair Tower further north of the HMA. The setback at ground floor level not only breaks down the massing, but also provides a much needed covered service footpath for all the plant rooms.

3.2.3     This simplicity in form is also applied to the entrance canopy, car park covers, and etc.  Simple lines, walls and roof slabs express the utilitarian nature of the Workshop Building, while the articulation helps bring down the scale. Finishes and materials on building exterior are generally be sprayed textured coating in a combination of cream and earth tones, in appropriate patterns, to enhance a visual harmony between the entire HMA and the green surroundings.

 

 

3. 3      Tunnel Portal at Scenic Hill          

3.3.1     Given the relative modest scale and gentle gradient of Scenic Hill, the building mass would inevitably be relatively imposing. Unfortunately, the volume and configuration of the building is largely determined by the required building services accommodation, and restricted by the lot boundary stipulated in the project brief.

3.3.2     The building configuration has been made as compact as possible in order to achieve a more pleasant visual integration between Scenic Hill and the building mass. The architectural articulation on the facades, the choice of finishes and colours are conscious efforts in further breaking down the building scale.

3.3.3     Design of the West Portal Ventilation Building has undergone the vetting process by the Design Advisory Panel of ArchSD. The building design has been developed in the following aspects:

Ø    Optimized building height and maximized greening façade so that the building will be visually better integrated with its surroundings;

Ø    Horizontal screen feature wrap dynamically around the main building bulk, soften the building and suggest a light weight outlook

Ø    Different colour shades at the horizontal screen to imitate complex shadow and line relationship, such that the building is more dissolved into the green knoll when viewing at a far distance.

 

3. 4      Tunnel Portal for HAT Tunnel      

3.4.1     The design of the east and west portals of HAT is similar to that of the east portal of Tunnel SHT.  The formation of the tunnel portal and approach will be by retaining walls with fair face concrete and ribbed concrete finish in a pattern.  The general colour scheme and textures of finishes are in line with those used at the HMA.

 

3. 5      Bridge A1 and A2 of the HKLR   

3.5.1     The proposed Bridges A1 and A2 under this Contract have been designed with minimal visual impact to the surrounding environment.

3.5.2     Bridge A1 forms part of the re-aligned East Coast Road with 4 continuous span (25m-35m-35m-25m) to span over a roundabout. It is designed as a reinforced concrete deck which is supported on single monolithic piers at intermediate supports and on mechanical bearings at both ends.

3.5.3     Bridge A1 sits within Zone 1 of the HKIA Approved Plant Species List. There are significant restrictions in terms of the amount and type of greening that can be carried out in this area.

3.5.4     Bridge A2, it is an elevated viaduct proposed to be bifurcated from the existing East Coast Road ramp structure and link with the Airport Road.  It composes of two 4-span continuous deck structures carrying one traffic lane with hard shoulders at both sides. The span arrangements of the two decks are 35-45-45-35m and 35-47-65-50m.

3.5.5     Both decks are designed as a pre-stressed deck, most of the piers are monolithically connected to the deck soffit to minimize the number of bearings and create a flush profile. Concrete rib profile is provided at the piers and abutments as before to create similar appearance as compared to the existing bridge structures nearby.

3.5.6     Bridge A2 sits within Zone 2 of the HKIA Approved Plant Species List. There are limitations in terms of the amount and type of greening that can be carried out in this area, which it currently devoid of plant material and includes just grass surfaces and occasional decorative feature shrubs. Further screen tree planting has been proposed where possible to meet the EIA requirements in this regard.

3.5.7     The details of mitigation measures for minimization and avoidance of potential impacts and the design measures as mitigation measures on the proposed Bridges A1 and A2 are incorporated in Section 4.3 Table 4.2 ¡V Items 4 to 6.

 

3. 6      Roadside Areas within the Secure Area of the HKLR

3.6.1     These newly formed areas on reclaimed land are essentially planted for visual amenity where thin strips of land are contained as both a central median and between the road margin and the security fence. This planting are required to conform to the requirements of the HKIA APSL and further requirements noted by AAHK regarding flight safety, whilst improving the visual outlook of the road and encouraging sea views. The margins are generally drained away from the roadside in order to act as natural swales, encouraging storm water to slow and be absorbed within the planter areas. Planting design varies over the length of the road according to the parameters set by AAHK however it is designed to fit into the overall theme and respond to viewing from vehicles travelling at high speed.

3. 7      General Mitigation Measures

3.7.1     General mitigation measures for minimization and avoidance of potential impacts are incorporated and presented below Section 4 in tabulated form.

 


 

4.      Adopted Design Measures

4.1      Landscape and Visual Design Measures

4.1.1    Corresponding mitigation measures are proposed to avoid and reduce the identified impacts. Furthermore, mitigation measures to remedy and compensate unavoidable impacts will be proposed to minimize the magnitude of change caused to sensitive receivers during detailed design stage.

 

Table 4.1  General Mitigation Measures

Item

Recommended Mitigation Measures as stated in the Approved EIA Report ¡V Section 14.3.3.1

Mitigation Measures Adopted

in the Design

Compliance with EIA Requirement (Y / N)

1

Minimize the footprint of project and that the quantity of landscape character units and landscape resources affected

 

The project footprint has been adopted according to gazette. Impacts to valuable landscape resources including trees and natural rocks have been have been avoided where possible, protected and targeted for transplantation and reuse.

 

Y

2

Minimize temporary works areas for construction works

 

All temporary works area for construction works will always keep to minimum required. The proposed extent of temporary works area would also be reviewed and approved by relevant parties as to ensure the visual and environmental impact to the public is kept to minimum.

 

Y

3

Undertaking good site practices by applying hydroseeding on temporary stockpiles and reclamation areas

 

Good site practices such as hydroseeding will be implemented on temporary stockpiles, where applicable to actual site conditions. For instance, hydroseeding was applied to suppress the dust from ground after site clearance at the site formation area at West Portal of SHT Tunnels.

 

Y

4

Conservation of topsoil for reuse

 

All soil including the top soil is temporarily stockpiled for future reclamation and surcharging works.

Good quality existing topsoil shall be reused on the project. Poor quality, uncontaminated soil may be treated to improve its quality before re-use.

 

Y

5

Waste limitation by recycling of felled trees into woodchip mulch for use in landscaped areas

Part of the felled trees was transported to tree recycling workshop. Felled trees, clear dimensional and untreated wood shall be recycled to mulching materials and composting material. Mulching shall be provided to all planting areas at 50-70mm thick.

Y

4.2      Landscape Recourses, Landscape Characters Areas and Visually Sensitive Receivers under this Project

 

4.2.1        List of the identified Landscape Resources (LRs) and Landscape Characters Areas (LCAs) and Visually Sensitive Receivers (VSRs) extracted from EIA report are summarized in Appendix J and Appendix K for easy reference.

4.2.2        With reference to the approved EIA Report, 12 out of 32 identified Visually Sensitive receivers (VSRs) are relevant to this Project (see Key Plan of VSRs in Appendix L) Hence, only relevant photomontages with mitigation measures for these 12 VSRs are shown in Appendix L.

4.2.3        Implementation of mitigation measures for each EP conditions under this Project are further elaborated in Section 4.3 and 4.4.

 


4.3      Design Measures as Mitigation Measures during Detailed Design Stage

The identification of the landscape and visual impacts has highlighted the potential primary and indirect sources of impacts and their magnitude of change caused to sensitive receivers. Some design measures will be developed during detailed design stage.  Design mitigation measures are incorporated in the following Table 4.2.  Please refer to Appendix A for the location of mitigation measures implemented on this project.

Table 4.2 ¡V Mitigation Measures during Detailed Design Stage

Mitigation Code

Recommended Mitigation Measures as stated in the Approved EIA Report ¡V Section 14.3.3.2

Mitigation Measures Adopted in the Design

Related document and Reference Drawing no.

Mitigation Measure of impact of LR, LCA, and VSR

Item 1

Roadside planting and planting along the edge of the reclamation is proposed;

 

Roadside planting and planting along the edge of the reclamation is proposed where feasible.

 

 

Appendix C ¡V Mitigation Measures during Detailed Design Stage

 

Design Measures for LR and LCA

LR2, LR5, LR8, LR9, LR15, LCA4, LCA6, LCA12, LCA13

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

Item 2

 

Transplanting of mature trees in good health and amenity value where appropriate and reinstatement of areas disturbed during construction by compensatory hydro-seeding and planting;

 

A specialist subcontractor was hired to carry out all landscaping and arboriculture works for ensuring the health and amenity value of the tree is properly maintained, and the reinstatement is carried out at good standard. Compensatory hydro-seeding and planting will be provided during construction, where applicable to site conditions.

Appendix G ¡V Tree Preservation & Protection

 

Appendix H

Recipient Locations of Transplanted Trees

 

Appendix C ¡V Mitigation Measures during Detailed Design Stage

 

Design Measures for LR and LCA

LR3, LR9, LCA4, LCA12

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

 

Item 3

Protection measures for the trees to be retained during construction activities

 

Preservation and protection of trees will be implemented and follow the site procedure for protecting retained trees within and in the vicinity of the works areas.

Appendix G ¡V Tree Preservation & Protection

 

Appendix C ¡V Mitigation Measures during Detailed Design Stage

 

Design Measures for LR and LCA

LR3, LR9, LCA4, LCA6

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

Item 4

Optimizing the sizes and spacing of the bridge columns

 

Bridge A1 ¡V The two parallel deck structures at Bridge A1 was combined to a wide multi-box deck which reduces the total number of piers by half.  The pier size was optimized to provide sufficient space for bearings and shear keys.

 

Bridge A2 ¡V The pier spacing was optimized with a maximum intermediate span of 63m, which is close to the maximum span that a 2.5m deep box section can take.  A reduced pier section with flared top was adopted to minimise the pier size as far as possible.

 

Appendix C ¡V Mitigation Measures during Detailed Design Stage

Design Measures for LR and LCA

LR5, LR9, LCA4, LCA6

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18


 

Item 5

Fine-tuning the location of the bridge columns to avoid visually-sensitive locations

Both Bridge A1 and A2 were located at existing land which was far away from the new coastline.  Both decks were not situated at visually sensitive locations.

 

Appendix C ¡V Mitigation Measures during Detailed Design Stage

Design Measures for LR and LCA

LR5, LR9, LCA4, LCA6

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

Item 6

Aesthetic design of the bridge form and its structural elements for HKLR, e.g. parapet, soffit, columns, lightings and so on.

 

The bridge layout including the deck profile, parapet shape and concrete rib features at piers and ramp structures were referenced from existing vehicular bridges nearby.  Standard highway lightings were used to ensure they match with the existing lightings in the vicinity.

 

Appendix C ¡V Mitigation Measures during Detailed Design Stage

Design Measures for LR and LCA

LR5, LR9, LCA4, LCA6

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

Item 7

Considering the decorative urban design elements for HKLR, e.g. decorative road lightings.

The non-glare materials will be used for highways and associated structures in order to provide visual relief and blend in well with the surrounding environment. Road lighting will be provided in general along the central divider of HKLR to provide lighting to both carriageways.

Appendix C ¡V Mitigation Measures during Detailed Design Stage

Design Measures for LR and LCA

LR5, LR9, LCA6

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18


 

Item 8

Maximizing new tree, shrub, and other vegetation planting to compensate tree felled and vegetation removed;

 

The overall planting works has been designed in accordance with the HKIA APSL and the constraints therein. It has been designed to maximize the planting of trees and shrubs in all landscape areas.

 

Compensatory tree planting is in accordance with the approved tree removal applications and the follow-on discussions with the relevant maintenance authorities, e.g. AAHK, LCSD & HyD/LU.

 

Tree removal applications were approved by LandsD / DLO for the following:-

-    TRA-01 for Tree Areas 1-3

-    TRA-02 for Tree Areas 4-17

 

The tree removal application TRA-04 for whole site was submitted on 27 April 2019.

 

Appendix C ¡V Mitigation Measures during Construction and Operation Phases

 

Design Measures for LR and LCA

LR5, LR9, LR15, LCA4, LCA6, LCA12, LCA13

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

Item 9

Providing planting area around peripheral of HKLR and HKBCF for tree planting screening effect;

 

All opportunities to maximise shrubs / vegetation planting have been adopted along the central median and edges of HKLR within closed area.  

 

The Highway Operation and Maintenance Area sits within an area of constructed natural woodland which will develop to fully screen the compound. The road margins are greened in all areas and tree planting maximized. The seawall amenity area along the edge of the reclamation also maximizes use of tree and shrub planting in accordance with the HKIA APSL.

 

Appendix C ¡V Mitigation Measures during Detailed Design Stage

 

 

Design Measures for LR and LCA

LR2, LR5, LR8, LR9, LR11, LR15, LCA4, LCA6, LCA12, LCA13

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

Item 10

Providing salt-tolerant native trees along the planter strip at affected seawall and newly reclaimed coastline.

 

Specific tree species have been selected for resistance to salt spray for planting along newly reclaimed coastline, including the following:

 

PALM

Phoenix loureiroi (PL)

Ravenala madagascariensis (RM)

Strelitzia Nicolai (SN)

Caryota mitis (CO)

 

SMALL TREES

Tabebuia chrysantha (TC)

Callistemon viminalis (CV)

Grevillea robusta (GR)

Plumeria rubra (PR)

 

MEDIUM TREES

Thespesia populnea (TP)

 

LARGE TREES

Albizia lebbek (AL)

Senna siamea (SS)

Terminalia mantaly (TM)

Appendix C ¡V Mitigation Measures during Detailed Design Stage

 

 

 

Design Measures for LR and LCA

LR2, LR4, LR8, LR9, LCA3, LCA6, LCA13

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

Item 11

For HKBCF, providing aesthetic architectural design on the related buildings (e.g. similar materials for PCB building façade to Airport buildings, roof planting and subtle materials for other facilities buildings and so on), and the related infrastructure (e.g. parapet planting and transparent cover for the elevated footbridges) to provide harmonic atmosphere of the HKBCF.

 

Not Applicable to this Contract.

Not Applicable to this Contract.

Not Applicable to this Contract.

Item 12

Fine-tuning the sizes of the structural members to minimize the bulkiness of the buildings and adjustment arrangement to minimize disturbance to surrounding vegetation in the HKBCF.

Not Applicable to this Contract.

Not Applicable to this Contract.

Not Applicable to this Contract.

Item 13

For HKLR, providing aesthetic design on the viaduct, tunnel portals, at-grade roads and reclamation (e.g. subtle color tone and slim form for viaduct to minimize the bulkiness of the structure and to blend the viaduct better with the background environment, featured form of tunnel portals, roadside planting along at-grade roads and landscape berm on & planting along edge of reclamation area) to beautify the HKLR alignment.

 

Aesthetic design on the tunnel portals:

 

The building configuration of the West Portal of Scenic Hill Tunnel (SHT) has been made as compact as possible in order to achieve a more pleasant visual integration between Scenic Hill and the building mass. The architectural articulation on the facades, the choice of finishes and colours are conscious efforts in further breaking down the building scale. Details of the building design are described in Section 3.3 above.

 

Profile of the SHT East Portal, east and west portals of HAT are similar and are kept very simple. Retaining walls with fair face and ribbed concrete finish in a pattern. Design of the portals are vetted and accepted by the ACABAS.

 

Aesthetic design on the viaduct, at-grade road and reclamation shall be referred to Section 3.5 and 3.6 respectively.

 

Roadside planting along at-grade roads and edge of reclamation area are provided to beautify the HKLR alignment.

Appendix C ¡V Mitigation Measures during Detailed Design Stage

Design Measures for LR and LCA

LR5, LR9, LCA4, LCA6, LCA12, LCA13

Design Measures for VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18


4.4       Mitigation Measures during Construction Phase and Operation Phase

Implementation details of mitigation measure during Construction Phase and Operation Phase are summarized in Table 4.3 and please refer to Appendix B for the location of mitigation measures implemented on this project.

                                                                                                                   

Table 4.3 - Mitigation Measures during Construction Phase and Operation Phase

 

Recommended Mitigation Measures as stated in the Approved EIA Report ¡V Section 14.3.3.3

Mitigation Measures Adopted in the Design

Mitigation Measures Adopted in the Design Reference Drawing No.

Recommended Mitigation Measure of Residual impact of LR, LCA, and VSR

G1

Grass-hydroseed bare soil surface and stock pile areas.

Good site practices such as hydroseeding will be implemented on temporary stockpiles and bare soil surface (such as temporary cut slopes), where applicable to actual site conditions. For instance, hydroseeding was applied to suppress the dust from ground after site clearance at the site formation area at West Portal of SHT Tunnels.

Appendix D ¡V Photomontages of Mitigation Measures during Construction and Operation Phases

 

Construction Phase of LR and LCA:

LR2, LR3, LR8, LR9, LCA4, LCA5, LCA6

Construction Phase of VSR

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

G2

Add planting strip and automatic irrigation system of appropriate at some portions of bridge or footbridge to screen bridge and traffic.

Planting is to be undertaken in accordance with HKIA APSL and the requirements therein. Bridge A1 lies within zone 1 and tree planting is not possible in this zone. Furthermore, adequate space does not exist for such planting.

Bridge A2 and the footbridge are within Zone 2 and restrictions apply to the quantity and location of planting.

Grass, shrubs, palms are planted beneath Bridge A2 to maximize the planting area.

Appendix D ¡V Photomontages of Mitigation Measures during Construction and Operation Phases

 

 

 

 

 

 

Construction Phase of LR and LCA:

LCA4, LCA6

Construction Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

G3

For HKLR, providing aesthetic design on the viaduct, tunnel portals, at-grade roads and reclamation (e.g. subtle colour tone and slim form for viaduct, aesthetic design of the bridge form and its structural elements including the parapet, soffit, columns and so on and decorative urban design elements and lightings for the HKLR; featured form of tunnel portals, roadside planting along at-grade roads and landscape berm on & planting along edge of reclamation area) to beautiful the HKLR alignment.

Roadside planting is maximised in all areas of HKLR in accordance with HKIA APSL. Landscape berms and screen planting are provided in Zones 2 and 3 in accordance with HKIA APSL. Grass and groundcovers in Zone 1 are also planted in accordance with HKIA APSL.

 

The building configuration of the West Portal of SHT has been made as compact as possible to achieve a more pleasant visual integration between Scenic Hill and the building mass. The architectural articulation on the facades, the choice of finishes and colours are conscious efforts in breaking down the building scale.

 

Landscape berms are also provided along the edge of reclamation area providing better screening.

 

Appendix D ¡V Photomontages of Mitigation Measures during Construction and Operation Phases

Construction Phase of LR and LCA:

LR13, LCA1, LCA2, LCA8

Construction Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

G4

For HKBCF, providing aesthetic architectural design on the related buildings (e.g. similar materials for PCB building facade to Airport buildings, roof planting and subtle materials for other facilities buildings and so on), and the related infrastructure (e.g. parapet planting and transparent cover for elevated footbridges) to provide harmonic atmosphere of the HKBCF (see Figure 14.3.1 for example)

 

 

Not Applicable to this Contract.

Not Applicable to this Contract.

Not Applicable to this Contract.

G5

Vegetation reinstatement and upgrading to disturbed areas.

All disturbed landscape areas of this Contract are reinstated in accordance with HKIA APSL with hydroseeding / turfing and planting to the satisfaction of AAHK.

 

Compensatory trees will be provided for all the felled trees within both AAHK land and Government land.  Please refer to the below Item G6 for further details.  

Appendix D ¡V Mitigation Measures during Construction and Operation Phases

Construction Phase of LR and LCA:

LR2, LR3, LR9, LCA5, LCA6

Construction Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18


G6

Maximize new tree, shrub and other vegetation planting to compensate tree felled and vegetation removed.

 

The overall planting works has been designed in accordance with the HKIA APSL and the constraints therein. It has been designed to maximize the planting of trees and shrubs in all landscape areas.

 

Compensatory tree planting is in accordance with the approved tree removal applications and the follow-on discussions with the relevant maintenance authorities, e.g. AAHK, LCSD & HyD/LU.

 

Tree removal applications were approved by LandsD / DLO for the following:-

-    TRA-01 for Tree Areas 1-3

-    TRA-02 for Tree Areas 4-17

 

The tree removal application TRA-04 for whole site was submitted on 27 April 2019.

 

Appendix D ¡V Mitigation Measures during Construction and Operation Phases

 

Construction Phase of LR and LCA:

LR2, LR3, LR8, LR9, LCA4, LCA5, LCA6,

Construction Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18


 

G7

Provide planting area around peripheral of and within HKBCF and HKLR for tree screening buffer effect.

 

All opportunities to maximise shrubs / vegetation planting have been adopted along the central median and edges of HKLR within closed area.  

 

The Highway Operation and Maintenance Area sits within an area of constructed natural woodland which will develop to fully screen the compound. The road margins are greened in all areas and tree planting maximized. The seawall amenity area along the edge of the reclamation also maximizes use of trees and shrubs planting in accordance with the HKIA APSL.

Appendix D ¡V Mitigation Measures during Construction and Operation Phases

Construction Phase of LR and LCA:

LR2, LR9, LCA3, LCA5

Construction Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

G8

Plant salt tolerant native tree and shrubs etc along the planter strip at affected seawall

.

Specific trees have been selected for resistance to salt spray for planting along newly reclaimed coastline, including the following:

 

PALM

Phoenix loureiroi (PL)      

Ravenala madagascariensis (RM)

Strelitzia Nicolai (SN)

Caryota mitis (CO)

 

SMALL TREES

Tabebuia chrysantha (TC)

Callistemon viminalis (CV)

Grevillea robusta (GR)

Plumeria rubra (PR)

 

MEDIUM TREES

Thespesia populnea (TP)

 

LARGE TREES

Albizia lebbek (AL)

Senna siamea (SS)

Terminalia mantaly (TM)

Appendix D ¡V Mitigation Measures during Construction and Operation Phases

 

Construction Phase of LR and LCA:

LR2, LR8

Construction Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

G9

Reserve of loose natural granite rocks for re-use.  Provide new coastline to adopt ¡§natural-look¡¨ by means of using armour rocks in the form of natural rock materials and planting strip area accommodating screen buffer to enhance ¡§natural-look¡¨ of the new coastline (see Figure 14.4.2 for example)

Natural rocks are removed from the existing coastline and stockpiled. These natural rock materials are to be reused in the seawall to provide a ¡§natural-look¡¨ of the new coastline.

Appendix D ¡V Mitigation Measures during Construction and Operation Phases

 

 

 

 

 

Construction Phase of LR and LCA:

LR2, LCA3

Construction Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

Mitigate Visual Impacts

V1

Minimize time for construction activities during construction period.

 

Close monitoring on progress, well-planned for the works and provide sufficient resources to ensure the construction period is kept to minimum.

 

Construction Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

V2

Provide screen hoarding at the portion of the project site / works areas / storage areas near VSRs who have close low-level views to the Project during HKLR & HKBCF construction.

Decorated hoarding will be erected at the works areas and temporary storage areas.

 

 

Appendix D ¡V Mitigation Measures during Construction and Operation Phases

Construction Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

 

 

 

Mitigate Both Landscape and Visual impacts

G10

Provide proper planting maintenance on the new planting areas to enhance the aesthetic degree.

 

All planted areas at HKLR will be handed over to the relevant maintenance authorities following agreement of the design and maintenance requirements and procedures.

 

Appendix D ¡V Mitigation Measures during Construction and Operation Phases

 

Appendix I ¡V Maintenance Authorities for Soft Landscape Works

 

 

Operation Phase of LR and LCA:

LR2, LR3, LR8, LR9, LCA4, LCA5, LCA6

Operation Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

V3

Lighting design to minimize glare at night.  Decorative road lighting to be considered during detailed design stage.

The non-glare materials will be used for highways and associated structures in order to provide visual relief and blend in well with the surrounding environment. Road lighting will be provided in general along the central divider of HKLR to provide lighting to both carriageways. No decorative road lightings are specified in Employer¡¦s Requirements.

Appendix D ¡V Mitigation Measures during Construction and Operation Phases

Operation Phase of VSR:

VSR6, VSR7, VSR8, VSR9,

VSR10, VSR11,

VSR12, VSR13, VSR14, VSR15,

VSR17, VSR18

4.5       Maintenance and Management

4.5.1        As specified in Section 14.2.10 of the EM&A Manual regarding to the Long Term Management, the planting works shall be monitored during the first 10 years of the operation phase of the Project.

 

4.5.2        The Environmental Teams engaged by individual contractors of HKLR will be responsible for the landscape and visual monitoring works as listed in the monitoring programme in Table 14.1 of the EM&A Manual during construction and establishment period. For trees to be planted by the contractors to be engaged by HKLR project under mitigation measure G6 and G8 in referring above section, the monitoring responsibilities will be taken up by the HKLR¡¦s landscape contractor during construction and establishment period. The landscape and visual monitoring works, including those by the Environmental Team under this project and those engaged landscape contractor shall make reference to this LVP once this LVP is endorsed by PlanD/EPD. For reporting and submission on landscape and visual monitoring, the ET will submit their inspection report to IEC for countersign at bi-weekly during construction period and bi-monthly basis during establishment period accordingly.

 

4.5.3        For the tree planting works to be implemented by this project, the Resident Site Staff (RSS) will be responsible for supervision and acceptance of the tree planting works, while the RSS of HKLR will be responsible for providing information on specifications of tree planting works which will ensure that the works will meet the requirements of this LVP.

 

4.5.4        After the establishment period, the monitoring of planting works in the remaining 9 years of the operation phase of the Project will be taken up by the HKLR MOM contractor.

 

4.5.5        The schedule of management and maintenance responsibilities for landscape works is shown in Table 4.4 to identify the long-term management and maintenance responsibilities after the establishment period. Such arrangement has been included in the overall Management and Maintenance Schedule for the Project, which has been agreed by the Project proponent.

 

Table 4.4 - Landscape Works Schedule of Management and Maintenance Responsibilities

Item

Detailed Description

Management Authority

Maintenance Agent

Hard Landscape

1

Paving works

HyD (Within Gov. Land) or

AAHK (Within AAHK Land)

HyD or AAHK

2

Street furniture

HyD (Within Gov. Land) or

AAHK (Within AAHK Land)

HyD or AAHK

3

At-grade planter

HyD (Within Gov. Land) or

AAHK (Within AAHK Land)

HyD or AAHK

4

At-grade irrigation system

 

LCSD

EMSD

5

Irrigation system for Roof Greening

 

Respective User of Buidlings

HyD

Soft Landscape

1

At-grade road side planting works (trees, shrubs, groundcovers, turf and hydroseeding)

LCSD (Within Gov. Land) or

AAHK (Within AAHK Land)

LCSD or AAHK

2

Roof Greening

 

Respective User of Buildings

HyD

3

Planting on SIMAR slopes

 

HyD

HyD

4

At-grade planting works along HKLR

 

HyD

HyD

5

At-grade planting works within Tunnel Area

TD

TD

 

4.5.6        A full Operations and Maintenance (O&M) Manual will be prepared describing in detail all routine and periodic maintenance inspections and operations to be carried out by the O&M agent and/or his contractors. Typical operations and scheduling are illustrated in Table 4.5 and Table 4.6, zoning plan for HKIA APSL can be found in Appendix E.

 

 

Table 4.5 - Hard Landscape Maintenance Principle

Irrigation

Operation

Oversee system and adjust timers as required

Adjustment

Adjust valve water flow rates in field twice a year March and October

Repairing

Repair and replace fittings and pipework as required

Hard Paving

Repair

Check and maintain all paving and repair as required

Clear

Remove debris from drains twice a year and routinely check monthly and after storms

 

 

Table 4.6 - Soft Landscape Maintenance Principles

Planting

Watering

Watering to all plantings to ensure satisfactory growth and health (manual and automatic irrigation)

Fertilizing

Twice yearly November and March with emphasis on March application

Fungicide/Insecticide

Spray as necessary or 3 times a year with approved non-toxic pesticides

Weeding

Use selective herbicide to reduce maintenance costs as required

Securing

Adjust tree stakes, guys and ties as required for safety and avoid chaffing of bark

Repairing

After exceptional weather condition replace dead plants, repair damaged plants, bed in all plants that have blown over, firm up all other plants and immediately thereafter, remove dead plants and plant debris from the site

Litter Removal

Remove all litter and debris

Pruning/

Shrubs/

Groundcovers

Prune shrubs and ground covers twice a year in March and November in accordance with HKIA APSL (Revision 4.0.1: October 2015) for respective zones (i.e. Zone 1 or Zone 2)

Pruning Trees

Prune trees overhanging branches in accordance with HKIA APSL (Revision 4.0.1: October 2015) for Zone 2, monthly and as required for safety to minimize usage by birds

Mowing

Mow grass twice a year in March and October in accordance with HKIA APSL (Revision 4.0.1: October 2015) for respective zones (i.e. Zone 1 or Zone 2)

Tree Risk Assessment

Undertake Tree Risk Assessment in accordance with the latest edition of Guidelines for Tree Risk Assessment and Management Arrangement promulgated by Greening, Landscape and Tree Management Section of Development Bureau.


5       Summary

 

5.1.1        This LVP submission is prepared in fulfilment of Condition 2.11 of EP-352/2009/D (Covering Hong Kong Link Road between Scenic Hill Section to BCF) and Condition 2.9 of EP-353/2009/K (Covering the associated road link between HKBCF to HKLR and the Airport).

 

5.1.2        The HKLR Project mainly involves the construction of 1.1 km of tunnel at Scenic Hill, 23 ha reclamation land along eastern coast of Airport Island to form new Hong Kong Link Road between Scenic Hill to HKBCF and associated roadlinks between HKBCF to HKLR and the Airport .

 

5.1.3        All relevant design measures listed in Section 14.3.3.2 of the approved EIA Report (Register No.: AEIAR-144/2009 and AEIAR-145/2009) and Section 14.2.4 of the EM&A Manual have been considered in the detailed design stage. These measures have been incorporated into the landscape design as far as practicable.

 

5.1.4        Since HKLR is located underneath the air-flight route, the planting species shall comply with the planting restrictions in respective Zones of HKIA as stipulated in HKIA APSL (Revision 4.0.1: October 2015).

 

5.1.5        To minimize potential landscape and visual impact, other than maximizing greening opportunities, aesthetic architectural design on all above-ground structures to provide a harmonized effect on HKLR, eastern coast line and the adjacent Airport Island is the key design consideration.

 

5.1.6        Landscape and visual mitigation measures for construction and operation phases as recommended in Section 14.3.3.3 of the approved EIA Report and Section 14.2.5 of the EM&A Manual will also adopted as far as possible. Implementation details of mitigation measures relevant to the HKLR Project are described in this LVP submission.