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Mining Methods and Slope Stability Evaluation for Expanded Development of the Walstrum Aggregate <br /> Quarry <br /> TABLE OF CONTENTS <br /> NO, PAGE <br /> 1.0 INTRODUCTION ........................................................................................................ 1 <br /> 2.0 GENERAL SLOPE STABILTY FACTORS AND ISSUES .......................................3 <br /> 3.0 REVIEW OF GEOLOGICAL CONDITIONS AND HISTORICAL SLOPE <br /> STABILITY IN THE WALSTRUM QUARRY..........................................................4 <br /> 3.1 Site Specific Survey of Structural Geological in the Walstrum Quarry ...............6 <br /> 4.0 RECOMMENDED SLOPE CONTROLS FOR THE WALSTRUM QUARRY.......7 <br /> 4.1 Wall Orientation and Mining Direction.................................................................7 <br /> 4.2 Bench Height, Final Pit Slopes and Vertical Mining Direction.............................9 <br /> 4.3 Rainwater and Snowmelt Drainage...................................................................... 10 <br /> 4.4 Blasting Controls................................................................................................... 10 <br /> 5.0 REFERENCES............................................................................................................................... 14 <br /> ATTACHMENTS <br /> Attachment 1 —Walstrum Quarry Geological Structure Survey Data and Photos <br /> REVEY Associates, Inc. October,2001 <br />