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<br />West Elk Mine 2002 Annual Hydrology Report <br />WEST ELK MINE <br />2002 ANNUAL HYDROLOGY REPORT <br />MOUNTAIN COAL COMPANY, LLC <br />i <br />TABLE OF CONTENTS <br />1.0 INTRODUCTION .....................................................................................................................................1 <br />1.1 Overview of Mining Operations ................................................ <br />1 <br />2.0 HYDROLOGIC SUMMARY OF 2002 WATER YEAR .........................................................................1 <br />2.1 Climatological Data ...............................................................................................................1 <br />2.2 Stream Flow Data ..................................................................................................................5 <br /> <br /> <br />3.0 HYDROLOGIC MONITORING ..............................................................................................................6 <br />3.1 Surface Water Monitoring .....................................................................................................7 <br />3.2 Spring and Seep Monitoring ..................................................................................................8 <br />3.3 Ground Water Monitoring ...................................................................................................10 <br />3.4 Underdrain and Mine Water Monitoring .............................................................................13 <br />3.5 U.S. Forest Service Resources .............................................................................................13 <br />3.6 Monitoring Methods ............................................................................................................14 <br />4.0 MINE WATER MANAGEMENT ACTNITIES <br />...............................................15 <br />4.1 North Fork Water Rights ............................................................... .......................................17 <br />4.2 Sanitary Wastewater ..................................................................... .......................................17 <br />4.3 Sedimentation Ponds ..................................................................... .......................................21 <br />4.3.1 Ponds MB-1 and MB-2R ................................................. .......................................21 <br />4.3.2 Ponds MB-3, MB-4, and MB-5 ....................................... .......................................22 <br />4.3.3 Pond FW-1 ....................................................................... .......................................22 <br />4.3.4 RPE Pond ......................................................................... .......................................22 <br />Project # 00301 <br />HydroGeo, Inc. <br />