CONTENTS

1....... Introduction. 1

1.1        Background. 1

1.2        Objectives of the Pipeline Construction Plan. 1

2....... Sequence and Programme and Detailed Schedule for BPPS pipeline and Cofferdam Construction Works. 3

2.1        Overall Approach for Minimising Impact to Marine Ecology. 3

2.1.1        Work Front Management and Sequence of Work Programme. 3

2.1.2        Mitigation Measures and Precautionary Measures for Marine Mammals. 4

2.1.3        Considerations to Minimise Impact to Chinese White Dolphins (CWD) 6

2.1.4        Considerations to Minimise Impact to Finless Porpoises (FP) 6

2.1.5        Summary. 7

2.2        Detailed Schedule. 7

2.2.1        Preparation Phase. 7

2.2.2        Construction Phase. 7

 

Annex

Annex A         Environmental Review Report for the BPPS Pipeline Construction Options

 

List of Tables

Table 2.1       Mitigation Measures for the BPPS Pipeline Construction Works. 8

 

List of Figures

Figure 1.1      Indicative Location of Key Project Components

Figure 1.2      BPPS Pipeline Route and the Indicative Location of the Cofferdam

Figure 2.1      Detailed Schedule of Pipeline Construction Works

 

 

1.                  Introduction

1.1             Background

To support the increased use of natural gas in Hong Kong from 2020 onwards, Castle Peak Power Company Limited (CAPCO) and The Hongkong Electric Co., Ltd. (HK Electric) have identified that the development of an offshore liquefied natural gas (LNG) receiving terminal in Hong Kong using Floating Storage and Regasification Unit (FSRU) technology (‘the Hong Kong Offshore LNG Terminal Project’) presents a viable additional gas supply option that will provide energy security through access to competitive gas supplies from world markets.  The Hong Kong Offshore LNG Terminal Project will involve the construction and operation of an offshore LNG import facility to be located in the southern waters of Hong Kong, a double berth jetty, and subsea pipelines that connect to the gas receiving stations (GRS) at the Black Point Power Station (BPPS) and the Lamma Power Station (LPS).

The Environmental Impact Assessment (EIA) Report for the Hong Kong Offshore LNG Terminal Project was submitted to the Environmental Protection Department (EPD) of the Hong Kong Special Administrative Region Government in May 2018.  The EIA Report (EIAO Register No. AEIAR-218/2018) was approved by EPD and the associated Environmental Permit (EP) (EP-558/2018) was issued in October 2018.  An application for Further Environmental Permits (FEP) was made on 24 December 2019 to demarcate the works between the different parties.  The following FEPs were issued on 17 January 2020 and the EP under EP-558/2018 was surrendered on 5 March 2020:

§   the double berth jetty at LNG Terminal under the Hong Kong LNG Terminal Limited, joint venture between CAPCO and HK Electric (FEP-01/558/2018/A) ([1]);

§   the subsea gas pipeline for the BPPS and the associated GRS in the BPPS under CAPCO (FEP-03/558/2018); and

§   the subsea gas pipeline for the LPS and the associated GRS in the LPS under HK Electric (FEP-02/558/2018/A) ([2]). 

The location plan for the works associated with the subsea gas pipeline for the BPPS and the associated GRS in the BPPS (‘the Project’) is provided in Figure 1.1.  As the BPPS Pipeline design progresses and in further discussion with relevant Subsea Cable Owners on subsea pipeline / cable crossings as mentioned in Section 2.3.3 and Section 3.4.3 of the approved EIA Report, the construction methods of the BPPS Pipeline have been reviewed and an environmental review has been carried out to assess the potential environmental impacts associated with the latest construction options of selected sections of the BPPS Pipeline to confirm the environmental acceptability of these options making reference to the approved EIA Report (see Annex A for details).   The latest construction methods at different sections of the BPPS pipeline route is shown in Figure 1.2. 

1.2             Objectives of the Pipeline Construction Plan

This Pipeline Construction Plan for the Project has been prepared in accordance with Condition 2.8 of the Further Environmental Permit FEP-03/558/2018.

 

FEP No. FEP-03/558/2018, Condition 2.8: “The Permit Holder shall, no later than 1 month before the commencement of construction of the Project, submit 3 hard copies and 1 electronic copy of a pipeline construction plan of the Project to the Director for approval. The pipeline construction plan shall include but not limited to a detailed schedule, sequence and programme of different work fronts for carrying out the dredging and jetting works and cofferdam construction works for laying the subsea gas pipeline of the Project. The programming of the dredging and jetting works shall take into account the peak calving season of Chinese White Dolphin and peak occurrence season of Finless Porpoise, with a view to minimizing the impacts to marine ecology as far as practicable. The dredging and jetting works shall be carried out in accordance with the information as contained in the approved pipeline construction plan.”

The key objective of this Pipeline Construction Plan is to include a detailed schedule, sequence and programme of different work fronts for carrying out the dredging and jetting works and cofferdam construction works for laying the subsea gas pipeline of the Project.

The Pipeline Construction Plan will be reviewed and updated as appropriate, throughout the course of the construction works to confirm that it remains current with the latest detailed information.

 

2.                  Sequence and Programme and Detailed Schedule for BPPS pipeline and Cofferdam Construction Works

2.1             Overall Approach for Minimising Impact to Marine Ecology

In developing the sequence and programme for the dredging and jetting works of the BPPS Pipeline as presented in Figure 2.1, EIA recommendations, conditions of the FEP, the peak calving season of Chinese White Dolphin (CWD) and peak occurrence season of Finless Porpoise (FP) have been taken into account, with a view to minimizing the impacts to marine ecology, in particular marine mammals, as far as practicable.  It is also important to take into account the overall construction programme of the other components of the Project, including the construction of the LPS Pipeline, GRSs at the BPPS and the LPS and the LNG Terminal, such that the connections between each component could be made at the required time for operation of the Project in 2022 to support the HKSAR Government’s 2020 emission initiatives and contribute to achieving Hong Kong’s commitment to improving air quality and reducing carbon emissions.  The following paragraphs present the considerations made in developing the detailed schedule for the BPPS Pipeline to minimise impact to marine ecology, in particular CWD and FP.

2.1.1       Work Front Management and Sequence of Work Programme

Generally for marine construction activities, it is important to reduce the number and size of works areas and total duration of marine works to limit potential short-term behavioural disturbance and / or displacement of marine mammals.  The construction of the BPPS Pipeline will involve pre-trenching, pipe-laying, post-trenching and rock armour placement.  Each activity is scheduled to take place within a period of about three to nine months as presented in Figure 2.1.  In order to minimise potential short-term behavioural disturbance and / or displacement of marine mammals, the construction works for the BPPS Pipeline is planned to work 24 hours a day in some areas of the pipeline routes to shorten the total duration of marine works, such that marine mammals that have avoided the vicinity of the works areas can return to the area sooner.  Also, although some locations to be impacted may have moderate to high ecological importance (e.g. the waters at the west of Lantau Island, the waters between Soko Islands and Shek Kwu Chau), the pipeline construction works for the BPPS Pipeline are planned to be undertaken at discrete work fronts, e.g. the pre-trenching works will be conducted at Jetty Approach (KP 0.0 – 0.1), at subsea cable sterile corridors (KP 1.49 – 2.75 & KP 3.55 – 4.43) and at Urmston Road (KP 41.1 – 42.9) in Q1 to Q2 2021 while the pipeline laying works will be conducted afterwards in Q1 to Q3 2021 upon completion of the pre-trenching works at the corresponding sections of the BPPS Pipeline (see Figure 2.1 for the detailed schedule).  The work activities will also be carried out in sequence, i.e. phased.  The pre-trenching works will be conducted in Q1 to Q2 2021, followed by pipeline laying works in Q1 to Q3 2021, then post-trenching works in Q2 2021 to Q3 2022 and finally rock armour placement activities in Q3 2021 to Q3 2022 (see Figure 2.1 for the detailed schedule).  These activities will generally be conducted from the direction of Hong Kong Link Road (HKLR) (i.e. KP 25.1) towards the two ends of the BPPS Pipeline (i.e. BPPS GRS and the LNG Terminal) such that discrete work fronts will be maintained throughout the construction period.  Therefore, not the entire lengths of the pipeline route would be disturbed at any one time because pipeline pre-trenching, pipe-laying, post-trenching and rock armour placement activities would be undertaken in sequence.    Considering the temporary nature of the disturbance and with management of work fronts/sequence and the optimised works programme, impacts on marine mammals are expected to be of minor significance, except for sections of the BPPS Pipeline (between North of Tai O to Fan Lau, and between South of Soko Islands to LNG Terminal) where impact of minor to moderate significance is expected hence requiring mitigation.  Upon cessation of the disturbance, no significant long-term change in marine mammal distribution, abundance and usage pattern in the wider Hong Kong waters is expected.

2.1.2       Mitigation Measures and Precautionary Measures for Marine Mammals

Findings from the EIA and the Review Report on Finless Porpoise Peak Occurrence Season ([3]) showed that FP exhibited the tendency for greater activity in late hours at night and very early hours at surveyed locations compared to daylight hours.  Consequently to mitigate potential disturbance to FP especially in waters of moderate ecological importance between South of Soko Islands and LNG Terminal along the BPPS Pipeline (KP 0.0 – 8.9), pipeline dredging/ jetting works are scheduled to take place for 12 hours during daytime period (0700-1900) with marine mammal exclusion zone monitoring.  Furthermore, as the peak calving season of CWD is found to be in May and June, pipeline dredging/ jetting works between North of Tai O and Fan Lau (KP15.6 – 21.3) in May and June will be avoided to minimise potential disturbance to CWD.  Pipeline dredging/ jetting works for the remainder of the BPPS Pipeline would proceed with marine mammal exclusion zone monitoring for 24 hours a day to minimize the total works duration.  With the implementation of such work arrangement during daytime period in waters of moderate ecological importance between South of Soko Islands and LNG Terminal along the BPPS Pipeline (KP 0.0 – 8.9), avoidance of pipeline dredging/ jetting works between North of Tai O and Fan Lau (KP15.6 – 21.3) in May and June and the effective implementation of marine mammal exclusion zone monitoring as precautionary measure over the duration of dredging / jetting works, no unacceptable impact to FP and CWD is expected.

The following mitigation measures have been considered in the development of sequence and programme for the BPPS Pipeline and will be implemented during the construction of the BPPS Pipeline to minimise impacts to marine ecology, in particular marine mammals.

§   Pipeline dredging/ jetting works between North of Tai O and Fan Lau (KP15.6 – 21.3) will avoid the peak months of CWD calving (May and June);

§   Pipeline dredging/ jetting works between South of Soko Islands and the LNG Terminal (KP0.0 – 8.9) will be restricted to a daily maximum of 12 hours with daytime (0700 – 1900) operations;

§   The vessel operators of this Project will be required to use predefined and regular routes (that do not encroach into existing and proposed marine parks), make use of designated fairways to access the works areas, and would avoid traversing sensitive habitats such as existing and proposed marine parks.  Predefined and regular routes will become known to FP and CWD using these waters.  This measure will further serve to minimise disturbance to marine mammals due to vessel movements;

§   Any anchoring/ anchor spread requirements during Project construction will avoid encroachment into the existing and proposed marine parks, unless otherwise agreed by the Director of Environmental Protection;

§   Silt curtain deployment during Project construction will avoid encroachment into the existing and proposed marine park;

§   No stopping over or anchoring activity of vessels related to the Project should be conducted within existing and proposed marine parks even before, during and after typhoon, unless otherwise agreed by the Director of Environmental Protection;

§   Use of appropriate dredging and jetting rates with the use of silt curtain where needed as recommended in the Pipeline Laying Method Plan ([4]) to reduce potential water quality impacts from elevated SS due to the proposed marine works; and

§   Silt curtain will be checked and maintained to ensure its effectiveness in mitigating water quality impacts on existing, planned and potential marine parks.

Apart from the mitigation measures above, the following precautionary measures have been considered in the development of sequence and programme for the BPPS Pipeline and will be implemented during the construction of the BPPS Pipeline to further reduce potential impacts on marine mammals:

§   All vessel operators working on the Project will be given a briefing, alerting them to the possible presence of dolphins and porpoises in the marine works areas, and the guidelines for safe vessel operation in the presence of these animals.  The vessels will avoid using high speed as far as possible.  By observing the guidelines, vessels will be operated in an appropriate manner so that marine mammals will not be subject to undue disturbance or harassment;

§   All vessels used in this Project will be required to slow down to 10 knots around the Project’s marine works areas and areas with high dolphin and porpoise usage, including existing and proposed marine parks.  With implementation of this measure, the chance of vessel strike resulting in physical injury or mortality of marine mammals will be extremely unlikely; and

§   During marine dredging or jetting operations, a marine mammal exclusion zone within a radius of 250m from dredger or jetting machine will be implemented.  Qualified observer(s) will scan an exclusion zone of 250m radius around the work area for at least 30 minutes prior to the start of dredging or jetting.  If cetaceans or other megafauna are observed in the exclusion zone, dredging or jetting will be delayed until they have left the area.  This measure will ensure the area in the vicinity of the dredging or jetting work is clear of marine mammals prior to the commencement of works and will serve to reduce any disturbance to marine mammals.  When a marine mammal is spotted by qualified personnel within the exclusion zone, dredging or jetting works will cease and will not resume until the observer confirms that the zone has been continuously clear of the marine mammal for a period of 30 minutes.  This measure will ensure the area in the vicinity of the works is clear of the marine mammal during works and will serve to reduce any disturbance to marine mammals.  If necessary, for night-time works, exclusion zone monitoring for FP by underwater acoustic means would be explored to supplement the exclusion zone monitoring by trained observers.   A site trial will be conducted to demonstrate its practicability/ effectiveness before actual implementation during the night-time works.

Marine mammal exclusion zone monitoring has been demonstrated to be effective in reducing disturbance to marine mammals and has been adopted in marine construction activities in Hong Kong.  It is considered that the implementation of marine mammal exclusion zone monitoring will be effective in further reducing the disturbance of marine mammals during construction works at both daytime and night-time.  Marine mammal exclusion zone monitoring has been adopted in marine construction activities in Hong Kong during both daytime and night-time, in particular the north Lantau waters where CWD is more abundant ([5]) ([6]) ([7]) ([8]).  Marine mammal exclusion zone monitoring has been demonstrated to be technically feasible, and also effective in reducing disturbance to marine mammals and there is no reported case of marine mammal injury / behavioural change due to marine construction works with the implementation of marine mammal exclusion zone monitoring. 

It is important to note that in Hong Kong, many similar subsea pipelines and cables have been installed or permitted in marine mammal habitats.  There is no evidence of significant residual impacts on marine mammals due to pipeline installation activities. This Project has adopted similar construction methodology and mitigation measures and with appropriate mitigation, potential impacts to marine mammals are deemed environmentally acceptable.

2.1.3       Considerations to Minimise Impact to Chinese White Dolphins (CWD)

CWD generally sighted in West Lantau waters, especially the waters between Tai O and Fan Lau ([9])([10]) and the peak calving season of CWD is found to be in May and June.  In developing the detailed schedule for the BPPS Pipeline, such considerations of the avoidance of pipeline dredging/ jetting works between North of Tai O and Fan Lau (KP15.6 – 21.3) in May and June and reducing overall duration of exposure to marine construction works by marine mammals have been applied to effectively minimize impacts on marine mammals.  As presented in the detailed schedule (Figure 2.1), dredging works at North of Tai O and Fan Lau (KP15.6 – 21.3) are not required for the BPPS Pipeline while jetting works at North of Tai O and Fan Lau (KP15.6 – 21.3) will be conducted in Q4 2021 to Q1 2022, avoiding the peak calving season of CWD in May and June.  The pipeline construction works will be conducted in Q1 2021 for completion by Q4 2022 following the construction sequence and discrete work fronts as discussed in Section 2.1.1 to limit potential short-term behavioural disturbance and / or displacement of marine mammals.  The construction works for the BPPS Pipeline is planned to work 24 hours a day in some areas of the pipeline routes to shorten the total duration of marine works, such that marine mammals that have avoided the vicinity of the works areas can return to the area sooner.  In addition, marine mammal exclusion zone monitoring will be implemented over the duration of dredging / jetting works to further reduce the disturbance of CWD, including the period of CWD peak calving season in May and June, during construction works at both daytime and night-time.  Given the work activities are scheduled to avoid pipeline dredging/ jetting works between North of Tai O and Fan Lau (KP15.6 – 21.3) in May and June and they will be conducted in discrete work fronts and in sequence as discussed in Section 2.1.1 with the implementation of the mitigation measures and precautionary measures as discussed in Section 2.1.2, including marine mammal exclusion zone monitoring, unacceptable impacts to CWD, including the period of CWD peak calving season in May and June, are not anticipated.  Thus, potential impacts to CWD are deemed environmentally acceptable.

2.1.4       Considerations to Minimise Impact to Finless Porpoises (FP)

FP generally sighted in South Lantau and western Lamma waters around the Project area ([11])([12]) and the peak occurrence season of FP has been reviewed and the period between January and June appears to be the peak months of porpoise occurrences for the waters in the vicinity of the LNG Terminal site ([13]).  In order to match with the overall construction programme with all the other components of the Project, it is unavoidable to carry out pipeline construction activities at the areas frequented by FP between South of Soko Islands and the proposed Jetty (i.e. KP0.0 – 8.9) during the FP peak occurrence season.  In developing the detailed schedule for the BPPS Pipeline, the consideration reducing overall duration of exposure to marine construction works by marine mammals have been applied to effectively minimize impacts on marine mammals.  As presented in the detailed schedule (Figure 2.1), the pipeline construction works will be conducted in Q1 2021 for completion by Q4 2022 following the construction sequence and discrete work fronts as discussed in Section 2.1.1 to limit potential short-term behavioural disturbance and / or displacement of marine mammals.  In addition, the construction programme for the BPPS Pipeline has been carefully considered to reduce the number and size of works areas by having discrete work fronts and phased work activities, optimised works programme by working 24 hours a day in some areas of the pipeline routes, as well as limiting pipeline dredging/ jetting works to take place for 12 hours during daytime period (0700-1900) at areas frequented by FP between South of Soko Islands and the proposed Jetty (i.e. KP0.0 – 8.9) and the implementation of marine mammal exclusion zone monitoring as explained in Section 2.1.1 and Section 2.1.2.  Thus, potential impacts to FP are deemed environmentally acceptable. 

2.1.5       Summary

Overall, reducing the overall duration of exposure to marine construction works by marine mammals is an effective approach to minimize impacts on these animals.  Scheduling construction programme with the consideration of the peak calving season of CWD in May and June and peak season of FP, restricting the daily maximum working hours, and implementation of a marine mammal exclusion zone by which marine works would cease temporarily whenever a marine mammal is sighted inside the zone are appropriate measures for the BPPS Pipeline to achieve the purpose of impact avoidance and minimization.  The detailed schedule for the construction of the BPPS Pipeline has been developed based on the above considerations, as well as the overall construction programme of the other components of the Project to support the HKSAR Government’s 2020 emission initiatives and contribute to achieving Hong Kong’s commitment to improving air quality and reducing carbon emissions.

2.2             Detailed Schedule

Taking into account the considerations as discussed in Section 2.1, the BPPS Pipeline and cofferdam will be constructed based on the sequences and procedures below for both preparation and construction phases.  The detailed schedule is outlined in Figure 2.1.  Key mitigation measures and working rates for construction of the BPPS Pipeline are summarized in Table 2.1.

2.2.1       Preparation Phase

§    Pre-survey;

§    Geological investigation works; and

§    Removal of obstructions.

2.2.2       Construction Phase

§    Pre-trenching, including deployment of silt curtain and pilot test to be conducted during the early stage of pre-trenching works – pre-trenching works will be conducted by grab dredger with the following planned sequences:

1.             Urmston Road (KP41.1 – 42.9);

2.             Subsea Cable Sterile Corridors (KP1.49 – 2.75 & KP3.55 – 4.43);

3.             Pipeline Riser (KP0.0 – 0.1);

§    Cofferdam and sheet pile construction – cofferdam will be constructed by inserting sheet piles to the seabed near the pipeline shore approach at BPPS as shown in Figure 1.2, grab dredging for pipeline shore approach at BPPS (KP44.9 – 45.0) will then be carried out;

§    Pipeline laying – pipeline laying will be conducted using two pipeline laying vessels.  One vessel will conduct pipeline laying from Hong Kong Link Road (HKLR) towards BPPS (KP 25.1 – 44.9) while the other vessel will conduct pipeline laying from HKLR towards the Jetty (KP25.1 – 0.0).  Riser installation at the Jetty will then be conducted;

§    Post-trenching, including deployment of silt curtain and pilot test to be conducted during the early stage of post-trenching works – post-trenching works will be conducted by jetting machine with the following planned sequences:

1.             HKLR to West of HKIA (KP25.1-31.5);

2.             Sha Chau to Lung Kwu Chau (KP31.5 – 37.5);

3.             Lung Kwu Chau to Urmston Anchorage (KP37.5 – 41.1);

4.             West of BPPS (KP42.9 – 44.9);

5.             HKLR to Southwest Lantau (KP25.1 – 15.6);

6.             Adamasta Channel to Southwest of Soko Islands (KP15.6 – 8.9);

7.             South of Soko Islands (KP5.0 – 8.9);

8.             Subsea Cable Sterile Corridors (KP1.49 – 2.75 & KP3.55 – 4.43);

9.             Jetty Approach (KP0.1 – 5.0), excluding Subsea Cable Sterile Corridors;

§    Rock armour placement – rock armour placement will be conducted using two vessels (derrick lighter or equivalent).  One vessel will place rock armour from HKLR towards BPPS (KP 25.1 – 44.9) while the other vessel will conduct pipeline laying from HKLR towards the Jetty (KP25.1 – 0.0); and

§    Pipeline hydrotesting – hydrotesting will be conducted at two stages:

1.             intermediate hydrotesting will be conducted and the hydrotest water will remain in the pipeline until completion of final hydrotesting; 

2.             final hydrotesting to be conducted upon completion of rock armour placement and the hydrotest water will be discharged at the end of pipe at the Jetty (KP 0.0).

Table 2.1    Mitigation Measures for the BPPS Pipeline Construction Works

Work Location	Types and No. of Plant Involved	Allowed Maximum Work Rate	Silt Curtain at Plants	Silt Curtain at Water Sensitive Receivers (WSRs)	Other Measures
Pipeline Riser (KP0.0 – 0.1)	1 Grab Dredger	8,000m3 day-1 for 24 hours each day	Yes	Not required	Daily maximum of 12 hours with daylight (0700 – 1900)
Jetty Approach (KP0.1 – 5.0), excluding Subsea Cable Sterile Corridors	1 Jetting Machine	1,000m day-1 for 24 hours each day	Yes	Not required for grab dredging; Two layers at Southern Boundary of the proposed South Lantau Marine Park (KP0.1 – 8.9) for jetting	Daily maximum of 12 hours with daylight (0700 – 1900)
Subsea Cable Sterile Corridors (KP1.49 – 2.75 & KP3.55 – 4.43)	2 Grab Dredgers, followed by 1 Jetting Machine	8,000m3 day-1 for 24 hours each day for each dredger 720m day-1 for 24 hours each day for jetting machine	Yes
South of Soko Islands (KP5.0 – 8.9)	1 Jetting Machine	1,000m day-1 for 24 hours each day	Yes
Southwest of Soko Islands (KP8.9 – 12.1)	1 Jetting Machine	1,000m day-1 for 24 hours each day	Yes	Not required
Adamasta Channel (KP12.1 – 15.6)	1 Jetting Machine	1,000m day-1 for 24 hours each day	Yes	Not required
Southwest Lantau (KP15.6 – 21.3)	1 Jetting Machine	1,500m day-1 for 24 hours each day	Yes	Not required	Avoid the peak months of Chinese White Dolphin (CWD) calving (May and June)
West of Tai O to West of HKIA (KP21.3 – 31.5)	1 Jetting Machine	1,500m day-1 for 24 hours each day from KP26.2 to 21.3 720m day-1 for 24 hours each day from KP31.5 to 26.2	Yes	Not required
Sha Chau to Lung Kwu Chau (KP31.5 – 36.0)	1 Jetting Machine	720m day-1 for 24 hours each day	Yes	Two layers at Western Boundary of the Sha Chau and Lung Kwu Chau Marine Park (KP31.5 – 36.0)
Sha Chau to Lung Kwu Chau (KP36.0 – 37.5)	1 Jetting Machine	720m day-1 for 24 hours each day	Yes	Two layers at Western Boundary of Sha Chau and Lung Kwu Chau Marine Park (KP36.0 – 37.5)
Lung Kwu Chau to Urmston Anchorage (KP37.5 – 41.1)	1 Jetting Machine	1,000m day-1 for 24 hours each day	Yes	Two layers at NW corner of Sha Chau and Lung Kwu Chau Marine Park (KP37.5 – 41.1)
Urmston Road (KP41.1 – 42.9)	1 Grab Dredger	8,000m3 day-1 for 24 hours each day	Yes	Not required
West of BPPS (KP42.9 – 44.9)	1 Jetting Machine	1,000m day-1 for 24 hours each day	Yes	Two layers at CR1, CR2 (Note 1)
Pipeline shore approach at BPPS (KP44.9 – 45.0)	1 Grab Dredger	1,500m3 day-1 for 24 hours each day	Yes	Two layers at CR1, CR2 (Note 1)
Note: (1) CR1 and CR2 denote the coral colonies identified at the artificial seawall at BPPS.