Final Environmental Impact Assessment Report

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2 NON-TECHNICAL SUMMARY... I 1 INTRODUCTION BACKGROUND PROJECT IMPLEMENTATION SCHEDULE COST ESTIMATE KEY LEGISLATIVE, REGULATORY AND INSTITUTIONAL FRAMEWORK Introduction Requirement for undertaking an EIA Exemption from EIA Other environmental and other relevant legislation, regulations and guidelines Occupational Health & Safety INSTITUTIONAL RESPONSIBILITIES THE PROJECT PROJECT LOCATION PROPOSED ALIGNMENT General Description of the proposed alignment GEOMETRIC DESIGN PROPOSED DRAINAGE DESIGN CONCEPT MAJOR STRUCTURES JUNCTIONS TRAFFIC FORECAST CONSTRUCTION MATERIALS LAND ACQUISITION CONSTRUCTION ORGANISATION METHODOLOGY STUDY CORRIDOR INITIAL SCREENING OF POTENTIAL IMPACTS STAKEHOLDER CONSULTATIONS BASELINE DATA Desk Studies Field surveys ALTERNATIVES RDA ALIGNMENT ALTERNATIVE ALIGNMENTS AND PREFERRED SOLUTION NO-PROJECT ALTERNATIVE ENVIRONMENTAL BASELINE PHYSICAL ENVIRONMENT Topography and Land Use Geology and Hydrogeology Soils Climate and Climate Change i

3 P a g e ii Hydrology, drainage & Surface water resources Groundwater resources Ambient Air Quality Ambient Noise BIOLOGICAL ENVIRONMENT General Flora Fauna PROTECTED AREAS UNPROTECTED SENSITIVE AREAS SOCIO-ECONOMIC BASELINE INTRODUCTION BENEFICIARIES DEMOGRAPHY SETTLEMENTS SECTORS OF ECONOMIC ACTIVITIES AND OCCUPATION OF THE POPULATION LAND USE RECREATIONAL VALUES AND CULTURAL ASSETS PLANNED DEVELOPMENTS ENVIRONMENTAL IMPACTS AND THEIR MITIGATION INTRODUCTION DESIGN IMPACTS ON CLIMATE AND AMBIENT AIR QUALITY AND THEIR MITIGATION IMPACTS ON SOILS AND THEIR MITIGATION IMPACTS ON WATER RESOURCES AND THEIR MITIGATION IMPACTS ON FLORA AND FAUNA AND THEIR MITIGATION IMPACTS ON SENSITIVE AREAS AND THEIR MITIGATION NOISE IMPACTS AND THEIR MITIGATION VISUAL IMPACTS AND THEIR MITIGATION IMPACTS ON ROAD / TRAFFIC SAFETY AND THEIR MITIGATION INDUCED IMPACTS BENEFICIAL ENVIRONMENTAL IMPACTS BENEFICIAL SOCIO-ECONOMIC IMPACTS POTENTIAL CUMULATIVE IMPACTS WITH OTHER PROJECTS RESIDUAL IMPACTS SOCIO-ECONOMIC IMPACTS AND THEIR MITIGATION GENERAL ECONOMIC IMPACTS Beneficial socio-economic impacts Adverse socio-economic impacts SOCIAL IMPACTS CONCLUSIONS AND RECOMMENDATIONS ENVIRONMENTAL MANAGEMENT PLAN INTRODUCTION INSTITUTIONAL ARRANGEMENTS AND REPORTING COST ESTIMATE Cost of Environmental Mitigation Measures during Construction Phase... 81

4 P a g e iii Monitoring Cost IMPLEMENTATION SCHEDULE REFERENCES APPENDIX A GEOTECHNICAL INVESTIGATIONS APPENDIX B BIODIVERSITY REPORT APPENDIX I ENVIRONMENTAL MANAGEMENT PLAN (EMP) APPENDIX II ENVIRONMENTAL MONITORING PLAN ANNEX 1 NOTE OF MEETING AT FORESTRY SERVICE ANNEX 2 NOTE OF MEETING AT WATER RESOURCES UNIT ANNEX 3 LIST OF PEOPLE MET

5 P a g e iv LIST OF FIGURES Figure 1-1: Geographical location of proposed link road... 1 Figure 2-1: Proposed Main axis of road alignment (A1 drawing provided at end of this report) Figure 2-2: Overall alignment of proposed road (Google Image Sheet 1/5 ) Figure 2-3 : Typical Cross Section of road in FILL & CUT sections Figure 2-4 : Typical Cross Section of road in CUT sections with RETAINING WALLS Figure 2-5: Locations of stations for manual traffic counts Figure 2-6 (a) : Locations of Automatic Count Stations (Figures (b) (d) hereunder) Figure 2-7 : Locations of stations for O D surveys Figure 2-8 : Sub-division of road alignment into 6 sections Figure 5-1 : Office of Médine Sugar Estate (left) and prayer site on Rivière du Rempart (right) Figure 5-2 : Surficial Geology along project road alignment Figure 5-3 : Location of trial pits Figure 5-4 : Map of the Aquifers of Mauritius, extract Figure 5-5 : Soil Map of Mauritius, extract Figure 5-6: Isohyetal Map of Mauritius, Period Figure 5-7 : IDF Curves Figure 5-8: CWA abstraction points for domestic water supply from streams and rivers Figure 5-9 : Location of existing DWS boreholes in vicinity of road alignment Figure 5-10 : Groundwater Protection: Overview of Sensitive Zones and Catchment Boundaries Figure 5-11 : Aspects of forest belts in the reserves of River Cogliano (a) and Papayes (b) Figure 5-12 : Monvert Protected Forest Figure 6-1 : Residential morcellements at Beaux Songes Roundabout Figure 6-2 : Henrietta Village, Morcellement Pousson, La Marie Village Figure 6-3 : Cultural Site on Riviere du Rempart at the Beaux Songes Roundabout Figure 6-4 : Planned morcellement development at Beard Figure 7-1 : Variation of emission factor with vehicle speed for various air pollutants Figure 7-2 : Filtering Role of Roadside Vegetation Figure 7-3 : Decibel Scale of Commonly Encountered Sounds Figure 7-4 : Effect of Increasing Distance on Road Noise Levels Figure 7-5 : Logarithmic Decrease of Noise Levels Over Growing Distance from the Source Figure 7-6 : Effects of Noise Barrier Height on Noise Levels at Receptor Figure 7-7 : Wall, Berm and Combination Noise Barriers... 73

6 P a g e v LIST OF TABLES Table 2-1 : Proposed Geometric Standards... 6 Table 2-2 : List of hydraulic structures... 8 Table 2-3 : Description of Project Road Sections... 9 Table 2-4 : ANNUAL Traffic (PCUs) Forecast Eastbound Table 2-5: ANNUAL Traffic (PCUs) Forecast Westbound Table 5-1 : Annual Rainfall Projections Table 5-2: Intensity Duration Frequency Values Table 5-3 : List of boreholes along / in vicinity of proposed road alignment Table 5-4 : Overview of observed ranges of ambient air pollutants Table 5-5 : Prescribed levels for neighbourhood noise (Mauritius) Table 5-6 : Overview of traffic noise measurements along different roads in Mauritius Table 5-7 : Noise Level Patterns at Increasing Distance from Source Table 6-1 : Estimated Resident Population as at 1 st July Table 6-2 : Distance between the proposed alignment and settlements along the said alignment Table 6-3 : Distribution of the Mauritian labour force per Activity Table 6-4 : Major occupational group Table 7-1 : Summary of Observed Ranges of Ambient Air Pollutants at Selected Sites Table 7-2 : Summary of other socio-economic benefits Table 9-1 : Responsibilities for implementing the Environmental Management Plan Table 9-2 : Environmental Mitigation and Monitoring Cost (Construction Phase) Table 9-3 : Implementation Schedule for Environmental Measures... 81

7 P a g e vi ACRONYMS ADT Average Daily Traffic am ante meridies (before noon) amsl above mean sea level BoQ Bill of Quantities CH chainage CSO Central Statistics Office, Mauritius CWA Central Water Authority db decibel DoE Department of Environment EIA Environmental Impact Assessment EHS Environment Health and Safety Manager EMP Environmental Management Plan EPA Environmental Protection Act 2002 FS Feasibility Study GHG Greenhouse gas GN Government Notice GoM Government of Mauritius h hour HGV heavy goods vehicle km/h kilometer per hour M Million mg/l milligram per litre MoE Ministry of Environment, Sustainable Development, and Disaster and Beach Management MoHL Ministry of Housing and Lands MMS Mauritius Meteorological Services MRU Mauritian Rupees NA not available N.T.S. not to scale O/D survey origin/destination survey p.a. per annum p.m. post meridies (after noon) PCU Passenger Car Unit RDA Road Development Authority RoW Right of Way SE Supervising Engineer s second TDS Total Dissolved Solids TMRSU Traffic Management Road Safety Unit UNFCCC United Nations Framework Convention on Climate Change VOC vehicle operation cost WHO World Health Organisation WRU Water Resources Unit

8 P a g e vii This report was prepared by POERSCHMANN Melanie MOWLABUCUS Mohammad Farook LUXCONSULT (Mtius) Ltd., Environment Specialist LUXCONSULT (Mtius) Ltd., Environment Specialist With contributions from The Design Team; & Yousouf Mungroo, Biodiversity Expert