C1PSM 71-107R

Dry

Groundwater

U:\Jobs 1 to 400\PSM071 Macraes\Engineering\Round Hill East\Phase 2 - MEMO\[PSM71.R40- APPENDICES FIGURES.xls]Flac3d Proposed

Figure C2 Pells Sullivan Meynink PSM 71-107R

Oceana GoldRound Hill East

ANALYSIS OF ROUND HILL PIT STABILITY1996 MINING

TOTAL DISPLACEMENT

Dry

Groundwater

U:\Jobs 1 to 400\PSM071 Macraes\Engineering\Round Hill East\Phase 2 - MEMO\[PSM71.R40- APPENDICES FIGURES.xls]Flac3d Proposed

Figure C3 Pells Sullivan Meynink PSM 71-107R

Oceana GoldRound Hill East

ANALYSIS OF ROUND HILL PIT STABILITY1998 MINING

TOTAL DISPLACEMENT

Strength Reduction Factor (SRF) - 0.90

Strength Reduction Factor (SRF) - < 0.01

Dry

Groundwater

U:\Jobs 1 to 400\PSM071 Macraes\Engineering\Round Hill East\Phase 2 - MEMO\[PSM71.R40- APPENDICES FIGURES.xls]Flac3d Proposed

Figure C4 Pells Sullivan Meynink PSM 71-107R

Oceana GoldRound Hill East

ANALYSIS OF ROUND HILL PIT STABILITY

TOTAL DISPLACEMENTPROPOSED MINING STAGE 1

Strength Reduction Factor (SRF) - 1.30

Strength Reduction Factor (SRF) - 2.26

Dry

Groundwater

U:\Jobs 1 to 400\PSM071 Macraes\Engineering\Round Hill East\Phase 2 - MEMO\[PSM71.R40- APPENDICES FIGURES.xls]Flac3d Proposed

Pells Sullivan Meynink PSM 71-107R

Oceana GoldRound Hill East

ANALYSIS OF ROUND HILL PIT STABILITY

TOTAL DISPLACEMENTPROPOSED MINING STAGE 2

Figure C5

Strength Reduction Factor (SRF) - < 0.01

Strength Reduction Factor (SRF) - 1.03

Dry

Groundwater

U:\Jobs 1 to 400\PSM071 Macraes\Engineering\Round Hill East\Phase 2 - MEMO\[PSM71.R40- APPENDICES FIGURES.xls]Flac3d Proposed

Figure C6 Pells Sullivan Meynink PSM 71-107R

Oceana GoldRound Hill East

ANALYSIS OF ROUND HILL PIT STABILITY

TOTAL DISPLACEMENT1998 MINING

Strength Reduction Factor (SRF) - > 4.00

Strength Reduction Factor (SRF) - > 4.00

Dry

Groundwater

U:\Jobs 1 to 400\PSM071 Macraes\Engineering\Round Hill East\Phase 2 - MEMO\[PSM71.R40- APPENDICES FIGURES.xls]Flac3d Proposed

Pells Sullivan Meynink PSM 71-107R

Oceana GoldRound Hill East

ANALYSIS OF ROUND HILL PIT STABILITY

TOTAL DISPLACEMENTPROPOSED MINING STAGE 1

Figure C7

Strength Reduction Factor (SRF) - 2.48

Strength Reduction Factor (SRF) - > 4.00

Dry

Groundwater

U:\Jobs 1 to 400\PSM071 Macraes\Engineering\Round Hill East\Phase 2 - MEMO\[PSM71.R40- APPENDICES FIGURES.xls]Flac3d Proposed

Figure C8 Pells Sullivan Meynink PSM 71-107R

Oceana GoldRound Hill East

ANALYSIS OF ROUND HILL PIT STABILITY

TOTAL DISPLACEMENTPROPOSED MINING STAGE 2

Strength Reduction Factor (SRF) - 1.08

Strength Reduction Factor (SRF) - 2.01

Round Hill Model

Plant Site Model

U:\Jobs 1 to 400\PSM071 Macraes\Engineering\Round Hill East\Phase 2 - MEMO\[PSM71.R40- APPENDICES FIGURES.xls]Flac3d Proposed

Pells Sullivan Meynink PSM 71-107R

Oceana GoldRound Hill East

ANALYSIS OF ROUND HILL PIT STABILITYFINITE ELEMENT MESHES

Figure C9