Welsh Government M4 Corridor around Newport Proof of Evidence – Construction Adran yr Economi a’r Seilwaith Department for Economy and Infrastructure The M4 Motorway (Junction 23 (East of Magor) to West of Junction 29 (Castleton) and Connecting Roads) and The M48 Motorway (Junction 23 (East of Magor) Connecting Road) Scheme 201- The M4 Motorway (Junction 23 (East of Magor) to West of Junction 29 (Castleton) and Connecting Roads) and The M48 Motorway (Junction 23 (East of Magor) Connecting Road) (Amendment) Scheme 201- The London to Fishguard Trunk Road (East of Magor to Castleton) Order 201- The M4 Motorway (West of Magor to East of Castleton) and the A48(M) Motorway (West of Castleton to St Mellons)(Variation of Various Schemes) Scheme 201- The M4 Motorway (Junction 23 (East of Magor) to West of Junction 29 (Castleton) and Connecting Roads) and the M48 Motorway (Junction 23 (East of Magor) Connecting Road) and The London to Fishguard Trunk Road (east of Magor to Castleton) (Side Roads) Order 201- The Welsh Ministers (The M4 Motorway (Junction 23 (East of Magor) to West of Junction 29 (Castleton) and Connecting Roads) and the M48 Motorway (Junction 23 (East of Magor) Connecting Road) and the London to Fishguard Trunk Road (East of Magor to Castleton)) Compulsory Purchase Order 201- The M4 Motorway (Junction 23 (East Of Magor) to West of Junction 29 (Castleton) and Connecting Roads) and The M48 Motorway (Junction 23 (East Of Magor) Connecting Road) (Supplementary) Scheme 201- The Welsh Ministers (The M4 Motorway (Junction 23 (East Of Magor) to West of Junction 29 (Castleton) and Connecting Roads) and The M48 Motorway (Junction 23 (East Of Magor) Connecting Road) and The London to Fishguard Trunk Road (East of Magor to Castleton)) Supplementary Compulsory Purchase Order 201- Proof of Evidence Barry Woodman, BSc (Hons) MBA CEng FICE FIHE MCIHT (Construction) Welsh Government, Construction Document Reference: WG 1.6.1 January 2017 Page 1 Welsh Government M4 Corridor around Newport Proof of Evidence – Construction CONTENTS 1. AUTHOR ................................................................................................... 7 Personal Profile and Qualifications .................................................................. 7 Personal Role in the Scheme........................................................................... 8 2. SCOPE OF PROOF OF EVIDENCE ......................................................... 9 Links with Other Evidence ............................................................................. 10 Terminology and Guidance ............................................................................ 11 3. CONTRACTOR’S ROLE ......................................................................... 13 Introduction .................................................................................................... 13 Design Development ...................................................................................... 14 Severed Land................................................................................................. 16 Construction Budget and Risk........................................................................ 17 4. CONSTRUCTION PROGRAMME ........................................................... 18 Introduction .................................................................................................... 18 Overall Duration ............................................................................................. 18 Programme Constraints ................................................................................. 19 Sequencing of Operations ............................................................................. 20 Castleton Interchange .................................................................................... 22 Wentlooge and Caldicot Levels ...................................................................... 23 River Ebbw Bridge, River Usk Crossing and Approach Viaducts ................... 25 Magor Interchange ......................................................................................... 26 Introduction .................................................................................................... 28 Safety, Health and Environmental .................................................................. 29 Construction Noise and Vibration ................................................................... 34 Dust and Air Pollution .................................................................................... 35 January 2017 Page 2 Welsh Government M4 Corridor around Newport Proof of Evidence – Construction Contaminated Land ........................................................................................ 35 Sustainable Construction. .............................................................................. 36 Section 28 of the Wildlife and Countryside Act 1981 ..................................... 37 Sustainability .................................................................................................. 37 Quality Control ............................................................................................... 40 Public Relations and Stakeholder Management ............................................ 40 6. TEMPORARY LAND INTRODUCTION ................................................... 43 Site Office compounds ................................................................................... 44 Borrow Pits..................................................................................................... 45 Temporary Works, Works Access and Safe Working Area ............................ 47 7. SCHEME LOGISTICS ............................................................................. 48 Introduction .................................................................................................... 48 Plant, Materials and Workforce on Site Movement ........................................ 49 Inbound Construction Vehicle Movements via the Local Road Network ........ 50 Site Accesses ................................................................................................ 51 8. TRAFFIC MANAGEMENT ....................................................................... 53 Existing M4 at Castleton ................................................................................ 55 Existing M4 at Magor ..................................................................................... 55 SDR at Maesglas ........................................................................................... 56 SAR at Glan Llyn ........................................................................................... 56 Side Roads .................................................................................................... 56 Permanent Road Closures ............................................................................. 56 Temporary Side Road Closures ..................................................................... 57 St Brides Underpass ...................................................................................... 58 Knollbury Lane Overbridge ............................................................................ 58 January 2017 Page 3 Welsh Government M4 Corridor around Newport Proof of Evidence – Construction Rockfield Lane Underbridge........................................................................... 58 Other Side Road Works ................................................................................. 58 Footpaths, Cycle Ways and Bridleways ......................................................... 59 9. CONSTRUCTION APPROACH .............................................................. 61 Introduction .................................................................................................... 61 Working Hours ............................................................................................... 61 Enabling Works .............................................................................................. 63 Statutory Undertakers and Private Service Diversions and Protection .......... 64 Earthworks and Associated Ground Treatment ............................................. 66 Excavation in Rock ........................................................................................ 69 Piling .............................................................................................................. 73 Drainage ........................................................................................................ 77 River Usk Bridge and Approach Viaducts ...................................................... 78 Other Structures ............................................................................................. 84 Highways ....................................................................................................... 88 10. RESPONSES TO OBJECTIONS ......................................................... 89 Introduction .................................................................................................... 89 General Construction Noise, Dust and Vibration (OBJ0003, 0022, 0330, 0150, 0096, 0279, 0234, 0239) ................................................................................ 90 Castleton Interchange Area, Access to Properties South of A48 Stopping up of the existing access to Tyn-y-Brwyn Farm (OBJ0003 and 0330) ................ 90 Access to Old Rectory Barn (OBJ0022) ........................................................