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• TABLE OF CONTENTS <br />INTRODUCTION .................................................................................. <br />PURPOSE ................................................. <br />OVERVIEW OF 2000 MINING AGTIVITIE$ <br />Thermal Event ........................................................................................................... ........................................... / <br />Longs,all Mining ....................................................................................................... ........................................... l <br />Development Minino ................................................................................................. ........................................... 1 <br />HYDROLOGIC CHARACTERIZATION OF 2000 WATER YEAR ........................................... ........................................... 1 <br />Climatological Data ................................................................................................. ........................................... 1 <br />Hydrological Dala .................................................................................................... ........................................... 2 <br />HYDROLOGIC MONITORING ACTIVITIES <br />SURFACE WATER MONITORING ............................................................................ ..................................................... $ <br />Sampling hlerhods ........................................................................................... ..................................................... S <br />SEEPS AND SPRRJGS MONITORMG ........................................................................ ..................................................... S <br />Sampling Methods ........................................................................................... ..................................................... 8 <br />GROUNDWATER MONITORING .............................................................................. .....................................................8 <br />UNDERDRAIN AND MINF. WATER MONITORING ................................................... ................................................... 12 <br />Sampling Methodc ........................................................................................... ................................................... 11 <br />MINE WATER MANAGEMENT ACTIVITIES ...................................................................................................14 <br />NORTH FORK WATER RIGHTS ......................................................................... ........................................................ 14 <br />SANITARY Vr'ASTEW'ATER ................................................................................ ........................................................ 14 <br />SEDIMENTATION PONDS .................................................................................. ........................................................ 17 <br />Ponds A!B-1 and MB-2R ............................................................................ ........................................................ 17 <br />Ponds MB-3. MB-4 and A!B-5 ................................................................... ........................................................ 17 <br />• <br />Pond FW-1 ................................................................................................. ........................................................ l8 <br />RPE Pond ................................................................................................... ........................................................ l8 <br />Pond SG-1 ............................................................................................. ........................................................ l 8 <br />BIOMONITORING TESTING FOR TOXICITY ........................................................ ........................................................ 18 <br />MINE WATER INFLOW'5 ................................................................................... ........................................................ 19 <br />NW PaneLc Sealed Sump ............................................................................ ........................................................ 19 <br />NE PaneLc Sealed Sump ............................................................................. ........................................................ 20 <br />Samples njAfine 1!'ater InJlo~~s ................................................................. ........................................................10 <br />MINE WATER BALANCE .................................................................................. ........................................................20 <br />ASSESSMENT OF MINING IMPACTS TO HYDROLOGIC RESOURCES ...................................................23 <br />SURFACE WATER IMPACTS ........................................................................... ...........................................................23 <br />Impact ojTDS on the North Fork ........................................................... ........................................................... 23 <br />SEEPS AND SPRINGS IMPACTS ....................................................................... ........................................................... 24 <br />Spring IYater Qualin' Data ..................................................................... ...........................................................14 <br />STOCK PONDS .............................................................................................. ........................................................... 24 <br />GROUNDWATER IMPACTS ............................................................................. ........................................................... 25 <br />ADEQUACY OF MONITORING PROGRAM <br />26 <br />u <br />