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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />'1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />TABLE OF CONTENTS <br /> Page No. <br />LETTER OF TRANSMITTAL <br />ACKNOWLEDGEMENTS <br />TABLE OF CONTENTS <br />INTRODUCTION 1 <br />Purpose and Scope 1 <br />1972 Thorne Report Water Summary 2 <br />Field Investigations 3 <br />HISTORIC CONDITION 3 <br />DURING MINING 9 <br />Present Condition 4 <br />North Quarry Exterior Access Road 5 <br />1975 Through 1990 Facilities 6 <br />Drainage Requirements During Later Mining Stages 8 <br />AFTER MINING 8 <br />Ground Water Conditions 10 <br />SUMMARY 12 <br />FIGURES Following Page 12 <br />Figure 1 General Plan <br />Figure 2 Drainage Inlet for Strain Gulch <br />Figure 3 Operating Area Drain Alternatives <br />Figure 4 Strain Gulch Drainage Alternatives <br />~ \ Leanard ft~ce Csn;dlinq Waler Enq,neers In; ~_ _ ~ `~ _ _ <br />