Smart Motorways Programme Environmental Assessment Report
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Smart Motorways Programme Environmental Assessment Report M62 Junctions 20 to 25 (Preliminary Design – PCF Stage 3) HE551534-WSP-EGN-SG-RP-LE-00025 July 2020 Notice This document and its contents have been prepared and are intended solely for Highways England’s information and use in relation to the Smart Motorways Programme. Environmental Assessment Report January 2020 Smart Motorways Programme M62 Junctions 20 to 25 Environmental Assessment Report Revision history Job number: HE551534 Document ref: HE551534-WSP-EGN-SG-RP-LE- 00025 Revision Purpose description Originated Checked Reviewed Approved Date P01 S4 – Issue for final 01/07/20 sign-off P02 S4 – Issue for final 03/07/20 sign-off Client signoff Client Highways England Project M62 Junctions 20-25 Document title Environmental Assessment Report Job no. HE551534 Document HE551534-WSP-EGN-SG-RP-LE-00025 reference Environmental Assessment Report July 2020 Table of Contents Executive Summary i 1. Introduction 1 1.1 Background to the Smart Motorway Programme 1 The Proposed Scheme 2 Purpose of this Environmental Assessment Report 2 Reporting 4 Regulation and Guidance 4 Expertise used to undertake the assessment 7 Stakeholder Engagement 9 2. The Proposed Scheme 10 Need for the Proposed Scheme 10 Existing Motorway 11 Description of the Proposed Scheme 14 Rectification, mitigation and enhancement 34 Construction Works 40 Forecast Traffic Characteristics 52 3. Alternatives Considered 64 Programme Level Alternatives 64 Scheme Specific Alternatives 64 4. Approach to Assessment 66 Introduction 66 Screening 66 Methodology 74 5. Air Quality 78 Introduction 78 Methodology 79 Baseline Conditions 89 Assessment of Effects 95 Residual Effects 99 Summary 99 Recommendations 100 6. Biodiversity 101 101 Introduction 101 Scoping 102 Methodology 103 Baseline Conditions 115 Assessment of Effects 125 Design, Mitigation and Enhancement Measures 132 Environmental Assessment Report July 2020 Smart Motorways Programme M62 Junctions 20 to 25 Environmental Assessment Report Residual Effects 139 7. Landscape and Cultural Heritage 140 Introduction 140 Scoping 141 Methodology 144 Baseline Conditions 156 Assessment of Effects 184 Design, Mitigation and Enhancement Measures 193 Residual Effects 196 Summary 197 8. Noise and Vibration 199 Introduction 199 Scoping 200 Methodology 201 Baseline Conditions 208 Assessment of Effects 214 Design, Mitigation and Rectification Measures 229 Residual Effects 250 Summary 251 Cumulative Impacts 252 9. Road Drainage and the Water Environment 254 Introduction 254 Scoping 255 Methodology 257 Baseline Conditions 266 Assessment of construction effects 287 Assessment of operational effects 290 Design, mitigation and enhancement measures 294 Residual effects 295 Summary 295 10. Assessment of Combined and Cumulative Effects 296 10.1 Introduction 296 Scoping 297 Methodology 298 Potential Effects 303 11. Abbreviations 315 Environmental Assessment Report July 2020 Smart Motorways Programme M62 Junctions 20 to 25 Environmental Assessment Report List of Tables Table 1-1 - Report Structure ......................................................................................................... 4 Table 1-2 - Fulfilment of the amended EIA Directive (2014/52/EU) ............................................... 5 Table 1-3 - Professional Competency ........................................................................................... 8 Table 2-1 - Existing Structures.................................................................................................... 12 Table 2-2 - Proposed Carriageway Configurations ..................................................................... 17 Table 2-3 - Proposed and Existing Rigid Concrete Barrier Locations .......................................... 19 Table 2-4 - Proposed New Emergency Area Locations .............................................................. 22 Table 2-5 - Gantry and Signing Provision ................................................................................... 23 Table 2-6 - Roadside Devices..................................................................................................... 27 Table 2-7 - Proposed Signs and Signals ..................................................................................... 28 Table 2-8 - Proposed Works to Overbridges .............................................................................. 29 Table 2-9 - Proposed Works to Underbridges ............................................................................. 31 Table 2-10 - Potential Locations for New or Upgrade Power Supply ............................................. 31 Table 2-11 - Priority Outfalls and Culvert Locations (High Priority or Above) ................................ 35 Table 2-12 - Drainage Works at Flooding Hotspots ...................................................................... 38 Table 2-13 - Works to Noise Barriers ............................................................................................ 38 Table 2-14 - Estimated Vegetation Clearance Requirements ....................................................... 42 Table 2-15 - Site Clearance Assumptions ..................................................................................... 44 Table 2-16 - Estimated Number of Portal and Cantilever Structures Requiring Removal .............. 46 Table 2-17 - Potential Total Traffic Flows 2300-0500 .................................................................... 49 Table 2-18 - Estimate of number of carriageway or full motorway closures................................... 50 Table 2-19 - RIS Schemes – Likely Region of Influence ............................................................... 52 Table 2-20 - Local Authority Schemes – Likely Region of Influence .............................................. 54 Table 2-21 - Summary of Developments ...................................................................................... 56 Table 3-1 - Principal Design Changes between DF1 to DF3 ....................................................... 65 Table 4-1 - Scoping Conclusions ................................................................................................ 66 Table 5-1 - Magnitude of Change Criteria for Local Air Quality ................................................... 87 Table 5-2 - Guideline to Number of Receptors Constituting a Significant Effect ........................... for Air Quality............................................................................................................ 88 Table 5-3 - AQMA within the Proposed Scheme’s Study Area .................................................... 91 Table 5-4 - Local Authority Diffusion Tubes in Exceedance within the ........................................... Proposed Scheme’s Study Area ............................................................................... 93 Table 5-5 - Highways England Diffusion Tubes in Exceedance within the Proposed Scheme’s Study Area ............................................................................................... 94 3 Table 5-6 - Summary of Modelled Annual Mean NO2 at Worst Case Receptors (μg/m ) ............. 96 Table 5-7 - Number of Receptors with Perceptible Changes in Air Quality Above the Objective Value ........................................................................................................ 99 Table 5-8 - Overall Evaluation of Local Air Quality Significance .................................................. 99 Table 6-1 - Study Area and EZol for Each Ecological Receptor ................................................ 103 Table 6-2 - Results of Second Run of the Natural England Rapid Risk Assessment ................ 107 Table 6-3 - Resource Valuation, Adapted from IAN 130/10 ..................................................... 109 Table 6-4 - Magnitude of Impact for Biodiversity ...................................................................... 111 Table 6-5 - Significance of Effects (IAN 130/10) ....................................................................... 112 Table 6-6 - Significance of Effects Matrix for Biodiversity Categories........................................ 112 Table 6-7 - Summary of Assumptions and Limitations .............................................................. 113 Table 6-8 - Sites of Biological Importance within 1km of the Proposed Scheme ....................... 117 Table 6-9 - Phase 1 Habitats within the study area and their listing as Habitats of.......................... Principal Importance and Local Biodiversity Action Plan Habitat ............................. 119 Table 6-10 - Potential for Bat Roots in Structures, 2018 Surveys ............................................... 120 Table 6-11 - Summary of Baseline Conditions and Value of Ecological Features ....................... 124 Table 6-12 - Loss of Habitats of Principal Importance ................................................................. 128 Table 6-13 - Design, Mitigation and Enhancement Measures ..................................................... 133 Environmental Assessment Report July 2020 Smart Motorways Programme M62 Junctions 20 to 25 Environmental Assessment Report Table 7-1 - Change to Potentially Susceptible Visual Receptors Recorded in Environmental Scoping Report ............................................................................... 142 Table 7-2 - Landscape and Visual Sensitivity Criteria ............................................................... 147 Table 7-3 - Magnitude of Impact – Landscape