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Logan Wash Mine TR No. 6 <br />TABLE OF CONTENTS <br />1.0 Introduction ........................................................................................................................1 <br />2.0 Background Information ..................................................................................................1 <br />2.1 General Background .............................................................................................. 1 <br />2.2 Evaluation of Mine-Water Storage and Portal Closure Integrity ..................... 2 <br />2.3 Current Closure Status .......................................................................................... 3 <br />2.4 Existing Monitoring Program ............................................................................... 4 <br />2.5 Mine Water Management ..................................................................................... 5 <br />3.0 Mine Drainage Design .......................................................................................................5 <br />3.1 Pipe Alignment and Materials ..............................................................................5 <br />3.2 Pipe Sizing ...............................................................................................................6 <br />3.3 Trench Construction and Pipe Installation .........................................................7 <br />4.0 Mine Discharge Monitoring ..............................................................................................8 <br />Attachment A Research Mine Maps <br />Attachment B Outfall 002 Discharge Data <br />Attachment C Pipe Sizing Calculations <br />Western Water & Land, Inc. <br />