Anaklia Deep Water Black Sea Port
Dredging and Reclamation
Method Statement for Dredging and Reclamation
Issued For Construction Use
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Method Statement for Dredging and Reclamation
Anaklia Deep Water Black Sea Port – Dredging and Reclamation
Document number Contractor:
Document number Client:
223083-VO-VO-E-MS-0002
VO-P1-DR00-CM-MS-0002
01
Issued for
Construction /
Issued for Use
27-10-2018
S2R
JAB
JAB
Revision
Description
Date
VO
Originator
VO Checked
VO Approved
Revision record
Revision Number
00
01
Description
Issued for Construction / Issued for Use
Issued for Construction / Issued for Use
Date
01-10-2018
27-10-2018
© Copyright Van Oord N.V. 2018
Copyright by Van Oord N.V. or any of its subsidiaries ("Van Oord Group").
This document is the property of Van Oord Group. This document or any part thereof is CONFIDENTIAL and may not be made
known, copied, multiplied, or used in any other way without the permission of Van Oord Group.
VO-P1-DR00-CM-MS-0002 # Rev. 01
Anaklia Deep Water Black Sea Port
Dredging and Reclamation
Method Statement for Dredging and Reclamation
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Table of contents
Content
1
2
3
4
5
Introduction ....................................................................................................................................... 4
1.1
Introduction .............................................................................................................................. 4
1.2
Abbreviations and Definitions .................................................................................................. 4
1.3
Area Plan ................................................................................................................................. 4
1.4
Scope of Work ......................................................................................................................... 5
Organization ..................................................................................................................................... 5
2.1
Organogram............................................................................................................................. 6
2.2
Responsibilities ........................................................................................................................ 6
Mobilization and site preparation ................................................................................................... 11
3.1
General .................................................................................................................................. 11
3.2
Site preparation works ........................................................................................................... 11
Activities ......................................................................................................................................... 12
4.1
Marine Equipment ................................................................................................................. 12
4.2
Land Based Equipment ......................................................................................................... 13
4.3
Survey.................................................................................................................................... 13
4.4
Dredging of marine basin and reclamation using CSD ......................................................... 15
4.4.1
Introduction ........................................................................................................................ 15
4.4.2
Dredging Suitable Material ................................................................................................ 15
4.4.3
Cutting Principle................................................................................................................. 15
4.4.4
Dredging Process .............................................................................................................. 16
1.1.1
Positioning and moving of the CSD ................................................................................... 16
1.1.2
Dredging Control................................................................................................................ 16
1.1.3
Cutting and discharging of the material ............................................................................. 17
4.4.5
Work Method – Reclamation ............................................................................................. 19
Working Cutting Plan...................................................................................................................... 19
5.1
Volumes ................................................................................................................................. 20
5.2
Activities ................................................................................................................................. 21
5.2.1
Dredging ............................................................................................................................ 21
5.2.2
Reclamation Preparations ................................................................................................. 21
5.2.3
Reclamation Sequence ..................................................................................................... 23
6
Quality ............................................................................................................................................ 24
7
Health and Safety ........................................................................................................................... 24
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Dredging and Reclamation
Method Statement for Dredging and Reclamation
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7.1
Risk Assessment ................................................................................................................... 24
7.2
Personal Protective Equipment ............................................................................................. 25
Environment ................................................................................................................................... 25
Appendix A – Equipment Specifications................................................................................................ 26
Appendix B – Bund Construction details ............................................................................................... 30
Appendix C – Template Inspection and Test Plan ................................................................................ 32
Appendix D – Risk Assessment and Work order form .......................................................................... 34
Figures
Figure 1 – Reclamation Work Area
..................................................... ……………………………….. 05
Figure 2 – Preliminary Drain Plan ......................................................................................................... 11
Figure 3– Floating Pipeline assembling area ........................................................................................ 12
Figure 4 - Cutter Suction Dredger ......................................................................................................... 12
Figure 5 - Land based equipment on the reclamation ........................................................................... 13
Figure 6 - Survey vessel ........................................................................................................................ 14
Figure 7 – Preconstruction survey ………………………………………………………………………….. 15
Figure 8 - Dredging cut .......................................................................................................................... 16
Figure 9 – Detail of screen dredge computer ........................................................................................ 17
Figure 10 – Ladder and cutter-head ...................................................................................................... 18
Figure 11 - Box Cut Method .................................................................................................................. 19
Figure 12 - Reclamation Process .......................................................................................................... 19
Figure 13 – Cutting plan
..................................................................................................................... 20
Figure 14 - Dredging area ..................................................................................................................... 21
Figure 15 - Typical bund cross section .................................................................................................. 21
Figure 16 – Water boxes & water flow .................................................................................................. 22
Figure 17 - Stage 1 ................................................................................................................................ 23
Figure 18 - Stage 2 ................................................................................................................................ 23
Tables
Table 1 - Area plan .................................................................................................................................. 4
Table 2 - Reclamation Volumes ............................................................................................................ 20
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Dredging and Reclamation
Method Statement for Dredging and Reclamation
1
Introduction
1.1
Introduction
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The Anaklia Development Consortium (ADC) has been appointed by the Government of Georgia to develop
a deep-sea port in Anaklia, Georgia. The Anaklia Port property is located just south of the Enguri River and
the village of Anaklia on the Black Sea, and just north of Kolkheti National Park in the Samegrelo-Zemo
Svaneti Region of the Republic of Georgia.
The Anaklia Deep Water Black Sea Port will have the capacity to accept vessels of 10,000 TEU and will be
able to handle mixed cargo containers, dry bulk and liquids.
1.2
1.3
Abbreviations and Definitions
CLIENT
Anaklia Development Consortium
VOG
Van Oord Georgia LCC
CSD
Cutter Suction Dredger
HSE
Health, Safety and Environment
PVD
Prefabricated Vertical Drains
MS
Method Statement
RA
Risk Assessment
PPE
Personal Protective Equipment
QA/QC
Quality Assurance / Quality Control
EIA
Environmental Impact Assessment
Area Plan
Reclamation Areas
Area A
Area B
Area C
Area D
Level
+6.0m
+6.0m
+8.5m
+8.5m
Table 1 - Area plan
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Dredging and Reclamation
Method Statement for Dredging and Reclamation
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Scope of Work
The dredging works scope consists of dredging the foreshore of the Anaklia development with the main
goal to supply sand for the onshore reclamation works. The volume required for the reclamation is
5.000.000 m3, and is to be dredged from a borrow pit, predominantly in future basin and channel of the
Port .





Pre / Post Bathymetric and Topographical Survey(s)
Dredging from borrow pit
The slopes of the dredged area are natural “as is”. It is noted slopes will be dredged using the “Box
cut” method.
Reclamation works at Area A, B, C and D to levels as indicated in project drawings (see Fig.1)
Install PVD’s in Area B, C, D (ref. VO-P1-DR00-CM-MS003 Method Statement Supply and Dry
Installation of PVDs)
Figure 1 – Reclamation Work Area
2
Organization
This chapter describes the personnel involved in the realization of the scope of works covered under this
method statement and provides information on the organization, roles and responsibilities.
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Dredging and Reclamation
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Organogram
Project
Manager
Secretary
QHSE
Purchase
Liaison Officer
Project
Controller
Works
Manager
Accountant
Drivers
2.2
Superintendent
Vessels
Reclamation
Chief surveyor
Technical
department
Surveyor
Survey vessel
Vessels
Responsibilities
The specific tasks and responsibilities of the project staff, crew and labor directly involved in the activities
covered under this method statement are described below and in the appendix Work Instruction in case
applicable.
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Dredging and Reclamation
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Roles and Responsibilities Project Manager



Ensure the execution of work in accordance with the Contract;
Responsible for the designation of personnel;
Maintain close liaison with the Client in relation to planning and safe
execution of the Project under his control;
 Approve project related procedures / method statements;

Ensure that work is carried out in accordance with approved drawings,
procedures, specifications and method statements;

Ensure implementation of the QHSE plans and procedures.
 Overall Responsibility for Quality on site.
 To supervise and approve Quality Plan and Inspection and Test Plans.
 To approve project related procedures / method statements.
 To ensure implementation of the Quality plans and procedures
 To ensure implementation of corrective / preventive actions
 To ensure implementation of audits in coordination with the QHSE
Manager
Roles and Responsibilities Works Manager
Responsibilities:
Responsibilities:
 Is responsible for his/her team including planning the aims, objectives and
priorities of their work area and communicating this to the team members and to
colleagues as appropriate
 To control and assign supervision to areas of work
 To control and report construction activities including progress against the
program
 To control and report actual cost of work done against budgeted cost of work
 To approve time sheets
 Leads by example; gets people to do what is necessary by having them to follow
his/her example
 Ensures that project personnel is aware of their duties as stated in the project
plans
 To ensure that work is carried out in accordance with approved drawings,
procedures, specifications and Method Statements
 To ensure that equipment on site is in proper condition and maintained during the
construction and that inspection log books are maintained
 To ensure all supervisors and foremen have received the required work
instructions or method statements
 Prepare work programs for forthcoming operations
 Liaising with Superintendents (onshore and near-shore) and Package Manager /
Project Manager
Quality, Health, Safety and Environment
 To assess subcontractors / vendors
 To ensure that work is carried out in accordance with approved drawings,
procedures, specifications and method statements
 To assess Subcontractors/vendors
 To ensure supervisors and foremen have received the required work instructions
or method statements
 To ensure work is conducted in safe manner, in accordance with the company
safety policy
 To ensure implementation of toolbox meetings and safe working practices
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 To execute site inspections
 To organize daily and weekly progress meetings
 To prepare incident reports
 Review of RAs which are part of Method Statements
 Review of Job Safety Analyses (JSA)
 Maintain HAZID/RA and where applicable JSA documentation
 Promote and ensure that all employees develop HSE awareness
Roles and Responsibilities Superintendent
Responsibilities:
 To ensure that the safety policies are implemented on the project
 To ensure that the highest standards of performance are maintained according to
the safety program on their job sites
 Is accountable for the safe performance of personnel and equipment on their
project sites Responsibilities
 To monitor the quality workmanship of site works
 To monitor Quality, Engineering, planning activities are as per the project and
Company requirements, thus providing necessary resources and guide
 To plan and co-ordinate the engineering process
 To plan and co-ordinate technical information as input for planning and production
of the work
 To monitor work and report on progress
 To evaluate actual test results records against the requirements
 To compile the required quantities and progress documentation
 To compile the required quantities and progress documentation;
 To implement a site HSE plan and develop a clear understanding of safety
responsibilities and specific duties for each foreman or supervisor
 To be knowledgeable about and responsible for complying with all legislation,
laws, and codes
 To hold at least one safety meeting bi-weekly with foremen to review safety
conditions and general safety policies
 To ensure sub-contractors and foremen conduct weekly toolbox meetings. Where
there are only a few employees, Superintendents shall conduct a weekly toolbox
meeting with all project personnel in attendance.
 To make daily observations of safety activities on the project
 To make themselves aware of the hazards that exist for the short-term, temporary
and new worker who is new to construction activities
 To ensure new employees (visitors) receive detailed safety instructions before
they are allowed to start work
 To assign new employees to work with other employees who are familiar with the
project and are aware of any specific safety rules and legislation that are in force
 To formulate for all new employees a detailed hiring route, which includes a
review of the project safety rules and legislation before the employees start to
work
 To ensure work is conducted in a safe manner, in accordance with the Client HSE
Policy
 To ensure efficient use of land and marine equipment and manpower
 To prepare the daily / weekly / monthly progress reports
 To conduct bi-weekly safety inspections
 To perform toolbox talk meetings as deemed necessary
 To define the weather criteria when to stop working with / starting up marine
equipment in consultation with Works Manager and master(s) of marine
equipment
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Roles and Responsibilities Project Surveyor
 To provide technical assistance in co-ordination matters regarding surveying with
the Company whenever required by the Works Manager
 To coordinate the surveying team providing suitable survey checks and setting
out information for installation
 To check dimensional information on drawings for consistency
Responsibilities:
 To ensure only suitably calibrated inspection and measuring equipment is used
for survey check, setting out and measuring activities
 To perform internal equipment calibration where necessary in accordance with
the calibration requirements / technical notes
 To prepare as-built drawings where required
Roles and Responsibilities Safety Officer
Responsibilities:
General
 To monitor compliance with legal requirements, company policy and manuals
during operations with regards to HSE
Quality, Health, Safety and Environment
 To relay any HSE information
 To assist project management and supervisors in providing regular toolbox talks
or induction courses with personnel on site
 Prepare communication support for personnel awareness on HSE matters
 To conduct regular site inspections and audits ensuring that the HSE program
and/or requirements of the projects HSE plan are adhered to
 To investigate accidents, dangerous occurrences and near misses and make
recommendations to prevent recurrence
 To ensure Health, Safety and Environmental recommendations are properly
communicated
 To perform visual inspections
 To advise the workforce on safe execution of the works
Roles and Responsibilities Foreman
Responsibilities:
 Provide safe working conditions for all workers under their supervision.
 Provide workers with instruction in safe work procedures. Supervisors shall
require employees to use personal protective equipment, as appropriate, as part
of their routine duties, e.g., hard hats, goggles, masks, respirators, safety glasses
or other items deemed necessary.
 Correct work site conditions, which are liable to cause or have caused accidents.
 Undertake the investigation of accidents, incidents, or near misses to determine
the underlying causes. Report in detail to the Superintendent and complete the
required report forms on a timely basis.
 Provide a good example for employees by always directing and performing work
in a safe manner.
 Conduct regular inspections for unsafe practices and conditions and ensure
prompt corrective action to eliminate causes of accidents.
 Work in cooperation with other project supervisory personnel to determine safe
practices, enforce their observance, develop procedures for dealing with
violations and develop other general safety and accident prevention measures.
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 Provide each employee with information about the hazards of his/her job and
how to avoid them.
 Maintain housekeeping standards and assign definite cleaning and organizing
responsibilities to individuals.
 Enforce all established safety legislation and work methods. Provide a minimum
of one toolbox meeting a week with their crew and record minutes on the
prescribed form
Roles and Responsibilities Master
Responsibilities:
General
 Overall command over the vessel (overriding authority)
 Manage the vessel and crew on behalf of the owner/ operator in an efficient and
economical manner, taking in account safety and environmental issues for all
operations.
 Ensure an efficient execution of the contractually agreed work in such a way that
the requirements are met
 Compliance with the shipping rules and regulations, local legislation and company
procedures.
 Plan, prepare and execution of marine operations and navigation
 Verifies and delegates required activities
 In emergencies situations the Master is overall in charge
 Responsible for providing competent persons for operation of the vessels
 Responsible for providing vessel familiarization / vessel induction
 Responsible for providing specific vessel information to the marine coordinator
 Responsible for adherence to Standing Instructions
 Responsible for making decisions based on reasonable workability to allow
transfer to and from his vessel
Quality, Health, Safety and Environment
 Final responsibility for the safety of the ship, it’s crew and all personnel on board
 Implement and maintain the QHSE system on board
 Has the authority to stop all operations which are not executed in a safe manner
and/or endangering the vessel and its crew.
 Report incidents to the Project Manager
 Responsible for understanding and complying with the applicable procedures,
applicable regulations and Risk Assessments
 To perform visual inspections
 Maintaining the vessel specific HAZID/RA
 Maintaining vessel specific JSA documentation
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Dredging and Reclamation
Method Statement for Dredging and Reclamation
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Mobilization and site preparation
3.1
General
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The vessels will be mobilized to Poti Port where the custom and immigration formalities will be performed.
After the documentation is finalized the marine equipment will sail to the Anaklia work site. Some auxiliary
equipment (pipelines, containers, spares etc) will be mobilized to Poti by vessel and transported by road to
site, and some equipment will be transported directly over the road to site from the Netherlands.
3.2
Site preparation works
The site needs to be drained to start the PVD’s installation and therefore pumps will be mobilized, and the
existing channel will need to be dammed off to prevent further water flow entering the reclamation area.
The water will be drained into the existing drain channel to the south which is discharging through the pump
station into the river (see Figure 2 – Preliminary Drain ).
Figure 2 – Preliminary Drain Plan
The dredging and the reclamation area will be cleared of obstructions by the client so the Contractor will
be able to start the construction work for the bunds and the installation of the PVD’s.
The floating pipeline will be assembled on the beach near Anaklia and will be installed on the site prior to
the arrival of the dredging vessel.
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Figure 3– Floating Pipeline assembling area
4
Activities
4.1
Marine Equipment
The following marine equipment or similar will be used for the execution of the works:
(Equipment details attached in Appendix A)



Cutter Suction Dredger (CSD) Athena – Self-propelled vessel that uses a rotating cutter head to
loosen the material in the seabed (‘cutting’). The Athena is 130 m long, with a total installed power
of 24,650 kW. Along with its sister vessel the Artemis, it's among the most modern and powerful
self-propelled cutter suction dredgers in the world.
The Cronus or similar. This multicat will act as an assistance vessel to the primary marine
equipment: fulfilling duties such as crew transfer, delivery of stores and spares. Furthermore the
vessel will install the floating pipelines and anchors.
The Rijnstroom and Midyia. This workboats will act as an assistance vessel to the primary marine
equipment: fulfilling duties such as crew transfer and delivery of stores. The workboats may be
deployed in other operations as dictated by the project: inspection of buoys, conducting survey,
towing of pipelines/barges.
Figure 4 - Cutter Suction Dredger
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Dredging and Reclamation
Method Statement for Dredging and Reclamation
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All marine based equipment will have communication equipment covering the requirements under
Section 35 20 23 3.01 A Bridge-to-Bridge Communication.
Transfer of personnel and materials will take place by using the jetty in front of area A and/or Palm
Beach Docking. Fendering will be placed in front of the jetty. In the event of high wave conditions
an alternative might be the use of a small boat sailing from the estuary for boat to boat transfer.
For all personnel transfer using either jetty or boat lifejackets must be used during transfer.
Bunkering of marine equipment will take place by bunker barge. A bunker barge will arrive on site
from Turkey and the Athena will be supplied with fuel and fresh water while all dredging operations
are stopped. It might be necessary to conduct these operations inside International Waters.
Bunkering of Cronus, Rijnstroom and Midyia will take place alongside the Athena or in Port / Jetty.
Land Based Equipment
The following land based equipment will be used for the execution of the works:



Hydraulic excavators – CAT 330 to CAT 349 or similar – The excavators will be used for the moving
and placement of the reclamation pipelines and for the placement and control of sand whilst the
discharge process is underway.
Wheel loaders – CAT 966 to 980 or similar – The wheel loaders will transport the reclamation
pipelines around the site. They will also tidy the work area, levelling off of the sand and providing
general assistance where needed onsite.
Bulldozers – CAT D6 to D8 or similar – The bulldozers will be used on the reclamation for the
spreading and levelling of the discharge material and for the construction of the bunds.
Figure 5 - Land based equipment on the reclamation
4.3
Survey
During the fieldwork of the Feasibility phase, survey monuments (benchmarks) have been installed around
the site that are well documented, coordinated and agreed upon between parties.
Horizontal Control is UTM Zone 37 based on WGS’84 and Vertical Control is BZ (Baltic Zero).
A survey team will ensure that both reclamation and dredging activities will be performed to the lines and
levels indicated on the Drawings.
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The main survey equipment that will be installed on both ships and land based equipment are GNSS (GPS)
rover receivers, that make will use of a base station which will be installed close to the working areas. This
combination provides both horizontal and vertical centimeter level accuracies.
Monitors or displays will present the location and height of the working units with respect to the lines and
levels (design).
Following units will be fitted with survey equipment:




CSD Athena included Multicat Cronus
The two workboats which will assist the Dredger
Selected Land based equipment
PVD installation units.
Rijnstroom or Midyia will be used as survey vessel to perform the hydrographic surveys. A bathymetric
survey system including a multibeam, motion sensor, heading device system will be installed on the vessel.
Figure 6 - Survey vessels
Topographic surveys will be performed by GNNS (GPS) rover receivers. Depending on the terrain a
combination of survey techniques with the GNSS antenna on a pogo stick, placed on a backpack or
mounted on a vehicle (quad) will be used.
Various types of surveys can be identified:
Preconstruction Surveys:
Prior to commencement reclamation works topographical surveys will be carried out to determine the actual
status of reclamation areas. This survey will be witnessed by an independent surveyor. Prior to
commencement of the dredging, bathymetric lanes of the borrow pit will be checked to verify that the
Bathymetry from 2016 is still applicable.
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Figure 7 – Preconstruction survey
Progress surveys:
Progress surveys will be executed at a regular basis on request of the Operation team, and are used to get
an overview of the progress of the works both on land and on water.
Post Surveys:
To demonstrate compliance with the Drawings and Specifications and as base for interim payments, Post
surveys will be executed. Post surveys of the final levels will be used in the As-Built drawings. Post surveys
of the reclamation will be witnessed by an independent surveyor.
4.4
Dredging of marine basin and reclamation using CSD
4.4.1
Introduction
Cutter Suction Dredger (CSD) Athena will be used as one of the main vessels for dredging, reclamation
and disposal of material. A CSD is a stationary dredger and consists of a pontoon, which is positioned with
spud-poles at the back and two anchors at the front; a CSD is equipped with an axially driven cutter head
mounted on the cutter ladder.
4.4.2
Dredging Suitable Material
In the basin suitable dredge material is present, this will be dredged by the CSD Athena and directly pumped
into the reclamation. The borrow pit area will be monitored and periodically evaluated that enough suitable
material is available otherwise the dredge area will need to be amended.
4.4.3
Cutting Principle
The soil is loosened by rotating a so-called “cutter head” or “the cutter”. The cutter head, which may be
electrically or hydraulically driven, is mounted at the extremity of a fabricated steel structure, named the
“ladder”, which is attached to the main hull by heavy hinges, that allows rotation in the vertical plane. The
cutter is axially driven. The cutter head is usually equipped with pick points or chisels -depending on the
governing soil conditions, mounted on the blades of the cutter head.
A CSD is equipped with powerful side winches mounted either side at the bow of the dredger. This enables
sideways dredging movement of the CSD.
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Dredging Process
The CSD is a stationary dredger. It is a floating pontoon or vessel that is able to dredge continuously in a
wide range of soil types. The CSD Athena is a so-called mega cutter dredger and capable of working at
sea and is mainly used for hard soils or large volume placement of materials.
The activities by the CSD consist of the following:





Positioning and moving of the CSD
Cutting and discharging of the material
Dredging in future quay wall area
Discharging material through pipelines
Repositioning of dredger
1.1.1 Positioning and moving of the CSD
A starting point will be chosen on the survey map. This starting point will be at the center of the so called
dredging cut (figure 7). The CSD will be positioned with its spud pole (working spud) near the starting point.
On either side of the CSD an anchor will be placed and the CSD will swing with its ladder from one side to
the other using the force of the winches and pulling at the anchors. At the same time the cutter head will be
rotating so the soil can be cut.
Once a full swing is completed an hydraulic cylinder will push the CSD forward by 1.0 – 1.5 mtr and the
next swing can be made. This hydraulic cylinder is fixed to the CSD and pushes against the spud pole.
Figure 8- Dredging cut
1.1.2 Dredging Control
Dredging control of the cutter suction dredger is maintained by means of the following systems and
equipment in order to control the position and depth by computer during the dredging process.
-
Cutter position monitoring system
Survey and positioning system
Dredge computer
The cutter position monitoring system works with angle transducers measuring the angle of the ladder to
determine the depth of the cutter head relative to the pontoon. A pressure transducer provides the depth of
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the pontoon at that location. A computer calculates the relative x, y and z coordinates of the cutter head
and makes it available to the survey system and dredge computer.
The survey computer determines that actual pontoon position with input from a gyrocompass, DGPS/RTK
system and tide level in combination with information from the cutter position monitoring system. The results
are presented on displays for the dredge operator.
The information on the displays include a top view with the outline and position of the dredger and the cutter
head on a background of bathymetric data. Centre lines, slope lines, obstacles such as buoys and cables
are shown in this view. Also a cross profile of the cut with the actual seabed, dredged depth and cutter
position will be shown. Further, the survey computer determines and displays variables such as the actual
offset of the cutter from the centerline, the depth of the cutter head amongst others.
Most operations such as dredge depth and swing speed of the cutter, rpm’s of the cutter head and pumps
can be controlled by the dredge computer. An interface between the survey computer and the dredge
computer enables control of the dredge process to pre-defined levels.
Figure 9 – Detail of screen dredge computer
1.1.3 Cutting and discharging of the material
At the end of the ladder a cutter head is fixed. The cutter head is driven by an hydraulic motor and rotates
around its own axis. A cutter head can be fixed with teeth in order to loosen the soil.
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Figure 10 – Ladder and cutterhead
At the back of the cutter head a pipeline is placed that is connected to the dredge pumps located inside the
dredger. While the cutter head is cutting the soil the suction power of the pumps will suck the material away
that falls inside the cutter head. The soil will be mixed with water and the mixture will be around 25% soil
and 75% water. The pump will generate enough velocity to suck the material away from the cutter head
and pump it towards the shore. A total of three pumps are installed.
The dredging works will commence deepening the basin to a depth up to -8m BZ to create enough water
depth for the dredger to freely dredge the area till final depth.
The “Box cut” method will be applied and subsequently natural slopes will develop.
Figure 11 – Box Cut Method
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Work Method – Reclamation
At the connection point, floating pipelines are connected to transport dredged material to its final position.
Dredged material will be pumped from CSD to the allocated reclamation areas utilizing a floating pipeline
connected to the dredger, which is connected to a submerged pipeline and a pipeline on shore.
Winds, waves and currents may affect the floating pipeline during dredging and pumping operations. It may
then be necessary to utilize anchors to restrain the area of occupancy of the floating pipeline and to keep
it reasonably stretched to prevent the pipe line from snapping. The anchoring set will be a number of Delta
Flipper anchors. They will be set out at both sides of the floating pipeline. The length of wire will be
approximately 35 meters.
The shore pipeline consists of 12 meter long steel pipes with flanges. Bolts through these flanges connect
the pipes. On the reclamation area the pipeline will be extended each time the required level is reached
within the relevant area; as appropriate the pipeline can be diverted in order to raise the neighboring areas.
Dredged material protruding above the water level will be spread and levelled with the assistance of a
suitable number of bulldozers. Pipelines will be extended when the area around the pipeline in use has
reached the required fill level. Extension of the pipeline will be done by connecting a new length of
pipeline with the assistance of an excavator and or wheel-loader.
Figure 12. Reclamation Process
Containment bunds (further partitioning the overall reclamation area) will be constructed using dredged fill
for flow direction and the transportation of the dredged material. The return water will freely drain off into
open water through a water box.
The (progress of the) reclamation works will be frequently monitored by means of a combination of
hydrographic surveys and topographic surveys (above water level). Results of these surveys will be
presented in bathymetric and topographic charts.
5
Working Cutting Plan
Prior to the start of dredging operations, a dredging plan is made in which the dredging area will be divided
into dredging zones. These zones are dependent on factors like design depth, characteristics of the soil,
local circumstances (current, tide, traffic, third party assets, etc.) and the dredger that we are using.
The dredging plan is prepared in such a way as to ensure that the dredging operation is executed in a
safe and controlled manner and to optimize productivity. The dredging plan will be adjusted during the
execution according with the circumstances .
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Figure 13. Cutting plan (tentatively)
5.1
Volumes
A dredging area of 91.4 ha has been defined by ADC in the near shore (fig.12) of the work area, and the
current seabed varies from -2m BZ until -8m BZ. A layer of average 6 to 6.5m needs to be dredged to have
sufficient reclamation material to supply the entire volume of the 4.500.000 m3. This layer can be dredged
in one time or in two times. There are some thin lenses of clayey material within the dredging area and
deeper from surface there is in general more fines in the borrow material. The required layer will be dredged
and during the dredging the material will be mixed to an homogeneous mixture and pumped ashore.
Reclamation Areas
Area A
Area B
Area C
Area D
Volume required
339.400 m3
1.083.500 m3
1.394.100 m3
1.684.500 m3
Table 2 - Reclamation Volumes as per Contract (Indicative)
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5.2
Activities
5.2.1
Dredging
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The CSD will dredge the area to at least -8m to create enough water depth for the vessel to move forward
towards the shore.
Figure 14 - Dredging area
5.2.2
Reclamation Preparations
The current situation of the work area is relatively low and requires proper bunds to be installed before
the reclamation works can commence. The area will be split in to two reclamation areas. Reclamation 1
consisting of Area A, B and C and Reclamation 2 will be Area D.
Figure 15 - Typical bund cross section
For further bund construction details see Appendix B.
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Furthermore the shore pipeline will be bolted together for the two areas, and water boxes will be installed
to let the excess water off the reclamation. The water boxes will be installed in the bunds and regulate the
water level inside the reclamation.
Figures 16 – Water boxes & water flow
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Reclamation Sequence
First the PVD installation will start in Reclamation area B/C, before the reclamation activities will
commence.
Stage 1:
Once the dredger arrived first Reclamation area A,B,C will be reclaimed to a level of approx. 2.5m to create
a base for the PVD installation in the inaccessible areas from area B and C. The pumping maximum
distance will be approx. 2,000m from the dredger to the reclamation.
Figure 17 - Stage 1
Stage 2:
Area D will be reclaimed to a level of approx. 2.5m to create a base for the PVD installation in that area.
The pumping maximum distance will be approx. 2,500m from the dredger to the reclamation.
Figure 18 - Stage 2
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Stage 3:
Reclamation areas A,B and C will be reclaimed to final level. So Reclamation Areas A,B and C will be
completed during this stage. While in Reclamation area D the PVD will be installed in the elevated area
(approx. +2.5m).
Stage 4:
In stage 4 Reclamation area D will be reclaimed till final level.
It should be noted that there will be overlap between the stages. This will mean that there will be relocation
between the areas frequently in order to guarantee continuity for the dredging vessel.
Weather forecast and wave measurements will be used for dredging workability.
Should dust become a problem than water will be sprayed on the reclamation in order to avoid dust or loss
of sand.
6
Quality
This chapter describes all quality aspects directly related to the scope of work covered under this method
statement.
For the overall project information on the quality aspects reference is made to the Project Quality Plan
As part of this method statement an Inspection and Test Plan (ITP) will be prepared in line with the
Project Quality Plan. Further reference is made to the ITP (VOMS-2.04-TE-03-09-03) in the
appendices.
Following are the activity which will be done to support reclamation work process:
-
7
Daily progress survey of the reclamation works
Daily dredging report
Health and Safety
This chapter describes all health and safety aspects including hazard identification, risk assessment and
applicable Personal Protective Equipment related to the specific scope of work covered under this method
statement.
For the overall project information on health and safety reference is made to the Project Health Safety and
Security Management Plan.
7.1
Risk Assessment
Prior to the start of an activity covered under this method statement a Risk Assessment (RA) will be carried
out in order to identify risks and if necessary mitigate risks to an acceptable level.
The Risk Assessment(s) will be discussed and communicated to persons involved prior to the start of works
and fully documented. Attending persons will be asked to sign the Risk Assessment to confirm their
attendance and understanding of the briefing.
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If compaction problems will occur we will deal with. If excessive fine layer will be found the impact will be
assessed on the final works.
Reference is made to the Risk Assessment form (VOMS-PR2.04-TE-03-09-03) related to the scope of work
covered under this method statement in the appendices.
7.2
Personal Protective Equipment
Mandatory Personal Protective Equipment (PPE) within Van Oord as a minimum are:
Mandatory PPE
Approved safety
footwear
Hard hat /
safety helmet
High visibility clothing
(jacket or coverall) with
long sleeves
Life jacket (when
working near or over
the water and during
boat transfer)
Certain specific tasks and activities covered under this Method Statement may require personnel to wear
job specific PPE.
The type of job specific PPE to be used will be indicated in the Risk Assessment and Work Instruction in
the appendices and/or the JSA prepared prior to the start of the work.
8
Environment
For the overall project environmental information reference is made to the Project Environmental
Management Plan.
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Appendix A – Equipment Specifications
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MIDYIA
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Appendix B – Bund Construction details
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Appendix C – Template Inspection and Test Plan
Inspection and Test Plan (ITP) for
……………… (Method Statement)
No.
Activity / description
1
2
Legend “Verification by”
WM – Works Manager
SI –
Superintendent
CS – Chief Surveyor
MV – Master of Vessel
QC – QC Inspector
Inspection method /
standard
Acceptance
Criteria
Legend “Inspection by”
HP – Hold point
WP – Witness point
MP – Monitor point
DR – Document review point
Frequency
Verification by1
Records
Inspection by 2
VO
Subcon
Client
……………………..
1.
2.
3.
4.
5.
6.
7.
8.
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Inspection and Test Plan (ITP) for
……………… (Method Statement)
No.
Activity / description
Issued For Construction Use
Page
1
2
Legend “Verification by”
WM – Works Manager
SI –
Superintendent
CS – Chief Surveyor
MV – Master of Vessel
QC – QC Inspector
Inspection method /
standard
Acceptance
Criteria
33 of 36
Legend “Inspection by”
HP – Hold point
WP – Witness point
MP – Monitor point
DR – Document review point
Frequency
Verification by1
Records
Inspection by 2
VO
Subcon
Client
9.
10.
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Appendix D – Risk Assessment and Work order form
Inspection and Test Plan (ITP) for
1 Legend “Verification by”
2 Legend “Inspection by”
……………… (Method Statement)
WM –
Works Manager
HP –
Hold point
SI –
Superintendent
WP –
Witness point
CS –
Chief Surveyor
MP –
Monitor point
MV –
Master of Vessel
DR –
Document review point
QC –
QC Inspector
No.
Activity / description
Inspection method /
standard
Acceptance
Criteria
Frequency
Verification by1
Records
Inspection by 2
VO
Subcon
Client
……………………..
1.
2.
3.
4.
5.
6.
7.
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Inspection and Test Plan (ITP) for
1 Legend “Verification by”
2 Legend “Inspection by”
……………… (Method Statement)
WM –
Works Manager
HP –
Hold point
SI –
Superintendent
WP –
Witness point
CS –
Chief Surveyor
MP –
Monitor point
MV –
Master of Vessel
DR –
Document review point
QC –
QC Inspector
No.
Activity / description
Inspection method /
standard
Acceptance
Criteria
Frequency
Verification by1
Records
Inspection by 2
VO
Subcon
Client
8.
9.
10.
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Template Work Instruction
Document No.
Version
Client
Date
Project
Location
Activity/Phase
Originator
Signature
Reviewed by
Signature
Approved by
Signature
1-Introduction
1.1 Task Objectives
Step by step activities for <name of task>
Procedure references: XXXXXXXXXXXXXXXXXXX
Job Safety Analysis no:
2-Procedure
Item
Task Description
Resp.
Check
1
1.1
2
2.1
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