Port of Durban Entrance Channel Widening & Deepening Project Completion Function 31 March 2010 Presented by: Theunis Steenkamp Project Director Natcor 1
The saying goes.. THE JOB IS NOT OVER UNTILL THE FAT LADY SINGS 2
The (Fat) Lady arrived on 23 March.. 3
The Lady arrived on 23 March.. The Fat Lady has sung 4
The Lady arrived on 23 March.. So I guess the job is complete. 5
CONTENTS 1 2 Historical Background Reasons for Widening 3 Design Considerations 4 5 Project Team 6 7 Project Statistics 8 9 Repairs: South Bank Access Road 10 11 Dredging 12 13 Revetments 14 15 Pre-Cast Operations & Rock Storage 16 17 Temporary Sand Supply 18 Project Elements Contract Particulars Detailed Scope Demolition North Bank & North Groyne South Breakwater Old Sub-Aqueous Tunnel Removal Aids to Navigation 6
HISTORICAL BACKGROUND 1860 1885 1850 7
HISTORICAL BACKGROUND 8
HISTORICAL BACKGROUND 9
MAIN PROJECT OBJECTIVES - SAFETY Primary Objective : Safe Navigation Channel Grounding Incidents 3.5 3 2.5 Number 2 1.5 1 0.5 0 Year 10
MAIN PROJECT OBJECTIVES INCREASE CAPACITY Improve the safety of navigation for ships currently using the channel Provide for future generation of ships Design ships : 6600 TEU L = 347m, B= 42.8m, Dr = 14m (Post Panamax) 99% availability 9200 TEU L = 350m B = 45.6m, Dr = 14.5m (Super Post Panamax) 95% availability 11
DESIGN CONSIDERATIONS Sand ingress control Wave energy penetration control Life cycle cost Environmental compliance Constructability Allowance for traffic during construction Protection and rerouting of services 12
PROJECT SAFETY RECORD Total manhours worked 6.5 million 1 million injury free hours achieved in Jul 2009 Project ended on approx 600 000 injury free hours Project now 6-months without any incidents 13
PROJECT ELEMENTS Elements completed prior to DHEW Project Caissons removed Municipality constructed new services tunnel Elements completed as part of DHEW Project Removal of redundant services tunnel Strengthening of south breakwater Demolition of buildings on north bank Demolition of structures on north bank Demolition of existing north breakwater Construction of new north groyne Construction of new north bank revetment Provision of aids to navigation (temporary and permanent) Undertaking dry excavation and dredging Maintenance of shipping movements Provision of a temporary sand bypassing facility 14
PROJECT TEAM Employer Transnet Capital Projects, acting on behalf of Transnet National Ports Authority EPCM Contractor HMG Joint Venture : Hatch (Pty) Ltd, Mott MacDonald, Goba (Pty) Ltd PRDW (Design of Entrance Works and involvement in construction supervision with HMG JV) Main Contractor (Entrance Widening Contract) Dredging International / Group 5 Consortium Primary Subcontractor Subtech T&T Marine Holcim Batch plants and concrete 15
ENTRANCE WIDENING CONTRACT PARTICULARS Overall Project Current Total Forecast Final Cost : Approx. R 2.85 billion (excluding new Sand Bypass Scheme) Budget : R 3.255 billion Entrance Widening and Deepening Form of Contract NEC 3 ECC Contract Option B, Priced Bill of Quantities Entrance Widening Contract Details Main Contract Value : Approx. R 2.23 billion Contract Duration : 150 weeks (Entrance Widening component only) Completion due March 2010 Actual Completion end-february 2010 16
PROJECT STATISTICS North Breakwater and Revetment Breakdown & rebuild 150 580 m 3 Buildings demolished 12 buildings 20t dolosse fabrication 550 units 5t cubes fabrication 1 400 units 10t cubes fabrication 2 400 units South Breakwater Breakdown and refurbish 12 500 m 3 30t Antifer cubes fabrication 1 000 units 45t Antifer cubes fabrication 3 500 units Dredging Total dredged quantity 10 200 000 m 3 Main channel 8 200 000 m 3 New North Groyne 215 000 m 3 South Breakwater 365 000 m 3 Sand Trap 1 400 000 m 3 Sub Aqueous Tunnel 5 000 m 3 17
DETAILED SCOPE North Side Demolition of existing buildings Removal of the old services tunnel Removal of existing Quay and Jetty structures Excavation of ±140m behind the structures Removal of existing breakwater Construct new breakwater using demolished/graded/sorted materials and imported quarry rock South Side Raising height of existing breakwater by 2m Increasing the cap width from 9,5m to 11,5m to accommodate construction/maintenance crane Reinforcing sea side with 30t & 45t Antifers Reinforcing and shaping the lee side 18
DETAILED SCOPE Dredging Dredge to new depth in inner channel, main channel and outer channel Dredge to expose toe of South Breakwater Dredge footprint of New North Groyne Dredge to expose old sub-aqueous tunnel Sand Trap dredging Continued supply of sand to beaches Channel bottom width increased to approx 220 m Navigation Aids New Breakwater Lights to North Groyne and South Breakwater New 205 deg Marker Temporary and Permanent PEL Light Towers and optics Fairway buoys Old Sub Aqueous Tunnel Removal of old Sub Aqueous Services Tunnel (possible world first) 19
REPAIRS TO SOUTH BREAKWATER ACCESS ROAD Storm and resulting damage March 2007 View of South Breakwater Access Road required to be re-constructed following storm damage in March 2007 20
DEMOLITIONS OCTOBER 2007 21
DEMOLITIONS 22
DREDGING OVERVIEW 23
DREDGING TSHD MARIEKE TSHD dredger Marieke was mobilised and arrived on site in June 2007 Built in 2006 stateof-art vessel Hopper capacity 5,600 m 3 Used to dredge the bulk of the 5,000,000 m 3 in the main channel 24
DREDGING UNEXPLODED ORDINANCE Approximate line of new revetment Unexploded ordinance recovered in the drag-head of the dredger Marieke on 24 June and 08 July 07 25
DREDGING UNEXPLODED ORDINANCE Approximate line of new revetment 26
DREDGING SAND TRAP ON OUTSIDE OF SOUTH BREAKWATER (TSHD Orwell) 27
DREDGING EXCAVATION OF NORTH BANK Approximate line of new revetment 28
DREDGING EXCAVATION OF NORTH BANK 29
DREDGING - BACKHOE DREDGER PINOCCHIO AND BARGES 30
DREDGING BARGES TRANSPORTING DREDGED MATERIAL TO DUMP SITE 31
DREDGING DISPOSAL AT OFFSHORE DUMP SITE 32
DREDGING OSPREY TRANSPORT SHIP 33
DREDGING OSPREY TRANSPORT SHIP 34
DREDGING DEPARTURE OF DREDGERS ON OSPREY 35
DREDGING OFFSHORE DUMP SITE 36
DREDGING MAGNETIC ANOMALIES 37
DREDGING MAGNETIC ANOMALIES 38
DREDGING MAGNETIC ANOMALIES Approximate line of new revetment 39
DREDGING - ENVIRONMENTAL MONITORING Initial monitoring sites Plume characterisation sites during New North Groyne pre-dredging 40
DREDGING CROSS SECTION OF CHANNEL EXISTING CHANNEL NEW CHANNEL 41
OLD NORTH GROYNE Approximate line of new revetment 42
OLD NORTH GROYNE - DEMOLITION AND REMOVAL 1. Demolition of concrete cap (approx. Jan 08) 2. Attempted blasting of North Groyne Approximate line of new revetment 43
OLD NORTH GROYNE - DEMOLITION AND REMOVAL 3. Removal of root of groyne and armouring (Jul 08) 4. Removal of remaining portion underwater (Aug 08) 44
NEW NORTH GROYNE 45
New North Groyne 46
47
NORTH BANK REVETMENT CONSTRUCTION 48
NORTH BANK DEMOLITIONS & REVETMENT CONSTRUCTION TUG JETTY FERRY WHARF REPAIR QUAY FUTURE REVETMENT LINE REVETMENT ARMOURING 49
NORTH BANK DECEMBER 2007 50
NORTH BANK JULY 2008 51
NORTH BANK OCTOBER 2008 52
NORTH BANK DECEMBER 2008 53
NORTH BANK FEBRUARY 2009 54
NORTH BANK JUNE 2009 55
REVETMENTS SIDE STONE DUMPING VESSEL POMPEII 56
REVETMENTS STONE DUMPING Placing 53mm Filter @ -4.0m CD Approx = 1,375m3 57
SOUTH BREAKWATER ANTIFER CUBE STOCKPILE JET PROBES RAISING CAP SAND TRAP DREDGING 58
SOUTH BREAKWATER VOID FILLING Large cracks Cap settlement 59
SOUTH BREAKWATER VOID FILLING Measurement of voids under cap foundation 60
SOUTH BREAKWATER RAISING & WIDENING CAP 61
Existing breakwater profile Seabed level Area to be dredged to be able to place units 62
SOUTH BREAKWATER ARMOUR PLACEMENT 63
SOUTH BREAKWATER ARMOUR PLACEMENT 64
SOUTH BREAKWATER ARMOUR PLACEMENT 65
SOUTH BREAKWATER WEATHER RISK Future Light to Moderate Overtopping Existing Light to Moderate Overtopping 66
SOUTH BREAKWATER WEATHER RISK 67
SOUTH BREAKWATER WEATHER RISK 68
SOUTH BREAKWATER WEATHER RISK 69
PRE-CAST OPERATIONS (SOUTH SIDE) 70
PRE-CAST OPERATIONS (NORTH SIDE) 71
ROCK STORAGE NORTH SIDE 72
OLD SUB-AQUEOUS TUNNEL REMOVAL 73
OLD SUB-AQUEOUS TUNNEL REMOVAL 74
OLD SUB-AQUEOUS TUNNEL REMOVAL 75
AIDS TO NAVIGATION CHANNEL SWITCHOVER PREVIOUS LEAD LIGHTS (STILL IN USE) FINAL PEL LIGHTS TEMPORARY PEL LIGHTS INTERIM CHANNEL CENTRELINE PREVIOUS CHANNEL CENTRELINE FINAL CHANNEL CENTRELINE 76
AIDS TO NAVIGATION PORT ENTRY LIGHT Fl R 3s R Alt R/W W Alt G/W G Fl G 3s 77
TEMPORARY SAND SUPPLY 78
DURBAN HARBOUR ENTRANCE VISIT BY THE QUEEN MARY 2 23 MARCH 2010 79
THANK YOU 80