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Environmental Assessment Volume E
Tailings Facility Table of Contents
Ambatovy Project iii January 2006
R:\Active\2003\03-1322\03-1322-172_Dynatec\5300 Documentation\Final EA\Volume A
TABLE OF CONTENTS
SECTION PAGE
1 ALTERNATIVES CONSIDERED ................................................................................ 1
1.1 SELECTION OF PREFERRED ALTERNATIVE .............................................................6
1.2 DESIGN OPTIONS..........................................................................................................6
1.3 PREFERRED OPTION....................................................................................................8
2 PROJECT DESCRIPTION.......................................................................................... 9
2.1 DESIGN STANDARDS....................................................................................................9
2.2 GENERAL DESIGN CRITERIA.......................................................................................9
2.3 PHASED DEVELOPMENT............................................................................................10
2.4 LAND ACQUISITION.....................................................................................................12
2.5 EARTHWORKS DESIGN ..............................................................................................12
2.5.1 Construction Materials ...................................................................................12
2.5.2 Embankment Cross Section ..........................................................................12
2.6 TAILINGS DELIVERY AND DEPOSITION ...................................................................13
2.6.1 Tailings Delivery System................................................................................13
2.6.2 Tailings Distribution System...........................................................................13
2.7 WATER MANAGEMENT DESIGN ................................................................................14
2.7.1 Operational Flows ..........................................................................................14
2.7.2 Effluent Treatment .........................................................................................14
2.8 OPERATION OF THE TAILINGS FACILITY.................................................................16
2.8.1 Embankment Raising.....................................................................................16
2.8.2 Tailings Deposition Plan ................................................................................17
3 PHYSICAL ................................................................................................................ 19
3.1 TOPOGRAPHY AND GEOMORPHOLOGY .................................................................19
3.1.1 Introduction ....................................................................................................19
3.1.2 Study Area .....................................................................................................19
3.1.3 Baseline Summary.........................................................................................19
3.1.4 Issue Scoping.................................................................................................19
3.1.5 Impact Assessment........................................................................................20
3.1.6 Conclusions....................................................................................................24
3.2 GEOLOGY AND GEOCHEMISTRY..............................................................................25
3.2.1 Introduction ....................................................................................................25
3.2.2 Baseline Summary.........................................................................................25
3.2.3 Impact Assessment........................................................................................27
3.2.4 Conclusions....................................................................................................28
3.3 SOILS ............................................................................................................................29
3.3.1 Introduction and Study Area ..........................................................................29
3.3.2 Baseline Summary.........................................................................................29
3.3.3 Impact Assesssment......................................................................................30
3.3.4 Conclusions....................................................................................................37
3.4 CLIMATE AND AIR QUALITY .......................................................................................38
3.5 NOISE............................................................................................................................39
3.6 NATURAL RISKS ..........................................................................................................40
3.6.1 Introduction ....................................................................................................40
3.6.2 Study Area .....................................................................................................40
3.6.3 Baseline Summary.........................................................................................40
3.6.4 Issue Scoping.................................................................................................41