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TAB 17 <br />TABLE OF CONTENTS <br /> Page <br />Ground Water 1 <br />Introduction 1 <br />Ground Water Inflows to Pits and Drawdowns 1 <br />Introduction 1 <br />McWhorter Analysis for Calculating Pit Inflows 1 <br />Drawdown from Pit Pumpage and Extent of Water Level Declines 9 <br />Potential Mining Impacts on Local Water Rights 11 <br />Removal of Wells and Ponds by Mining 13 <br />Pit Pumpage Drawdown Effects on Adjacent Water Users 13 <br />Production Well Impacts on Adjacent Water Users 14 <br />Impact of Replaced Spoil Material on Ground Water Flow and <br />Recharge Capacity 15 <br />Containment of Pit Inflow Pumpage and Impacts on Water Quality 16 <br />Impact of Spoil Water Quality on the Ground and Surface Water <br />Quality 17 <br />Overburden Characterization 18 <br />Controls on Spoil and Downgradient Water Quality 28 <br />Water Chemistry and Flow Inferences Based on Seneca 11 <br />Monitoring Results 37 <br />Potential Impacts of Replaced Spoil on Ground Water Quality 39 <br />Overburden and Wadge Coal Aquifers 41 <br />Alluvial Aquifers 44 <br />Potential Impact of Replaced Spoil on Surface Water Quality 49 <br />Surface Water 54 <br />Effects of Mining on the Local Geomorphology 54 <br />Drainage Basins 54 <br />Stream Channels 56 <br />Effects of Sediment Ponds on Channel Characteristics and <br />Downstream Users 58 <br />Effects of Sediment Pond Discharges, Diversions and Culverts at <br />Road Crossings on Surface Water Quality 61 <br />Effects of Runoff from Reclaimed Areas on the Quantity of Streamflow 62 <br />i Revised 9/98 <br />