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II I III I II I IIIIII III 0 ~ a~~l11/2001 <br />• <br /> <br />TABLE OF CONTENTS <br />SCOPE 1 <br />SUMMARY OF CONCLUSIONS 2 <br />PREVIOUS INVESTIGATIONS 3 <br />CURRENT INVESTIGATION 3 <br />Field Investigation 4 <br />Laboratory Testing 4 <br />EXISTING RDA CONDITIONS 5 <br />Project History 5 <br />Subsurface Conditions 9 <br />Groundwater Conditions 10 <br />Coal Refuse Properties 11 <br />Classification 11 <br />Standard Proctor Testing 12 <br />In-Situ Moisture and Density 13 <br />Direct Shear Test Results 14 <br />Summary of Existing RDA Conditions 15 <br />STABILITY ANALYSIS 16 <br />Model Development 17 <br /> <br />