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EXHIBIT 15 <br />TABLE OF CONTENTS -CONTINUED • <br />3.0 SUBSIDENCE ZONING .......... . ................................ 28 <br />3.1 ZONES OF MINOR SUBSIDENCE IMPACT .................... 28 <br />3.2 ZONES OF INTERMEDIATE SUBSIDENCE IMPACT ............. 28 <br />3.3 ZONES OF GREATEST SUBSIDENCE IMPACT ................. 28 <br />4.0 CONCLUSIONS AND RECOMMENDATIONS ........................ 30 <br />4.1 PREDICTED CHARACTER OF SUBSIDENCE .................. 30 <br />4.2 PREDICTED IMPACTS ON RESOURCES AND SURFACE <br />STRUCTURES ........................................... 31 <br />4.3 POTENTIAL MITIGATING MEASURES ........................ 32 <br />REFERENCES ...................................................... 33 <br />SUBSIDENCE HANDBOOK ............................................ 36 <br />SURFACE WATER RESOURCES -PONDS .................... 36 <br />GROUND WATER ........................................ 38 • <br />COLLUVIAL DEPOSITS -SPRINGS .......................... 39 <br />MASS MOVEMENT FEATURES -LANDSLIDES ................. 42 <br />ROADS AND TRAILS ...................................... 43 <br />TABLES <br />Pape <br />15-1 Predicted Subsidence for Bear #3 Mine thru July, i 994 ................... 7 <br />15-2 Predicted Subsidence Bowie #1 Mine ................................ 8 <br />15-3 Probability of Chimney Collapse Through Overlying Rock (data from Gray <br />eta1,1977) .................................................... 15 <br /> <br />ii <br />Pie-~ y <br />2/27/D ) <br />