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11111 <br />• TABLE OF CONTENTS <br />SCOPE ...............................................................................................................................1 <br />SITE HISTORY ...................................................................................................................1 <br />SITE CONDITIONS ............................................................................................................. 3 <br />PREVIOUS INVESTIGATIONS ........................................................................................... 5 <br />SITE GEOLOGY ................................................................................................................. 6 <br />Landslide, Recent (Qlsr) ........................................................................................... <br />Fill ("af', "pf', and "rr') ............................................................................................. .. 6 <br />.. 7 <br />Colluvium (Qc) ........................................................................................................... .. 7 <br />Landslide (Qls) .......................................................................................................... <br />Piney Creek Alluvium (Qp) ........................................................................................ .. 7 <br />.. 7 <br />Verdos Alluvium (Qv) ................................................................................................ <br />Pierre Shale (Kp) ....................................................................................................... <br />Missing Formations ................................................................................................... .. 8 <br />.. 8 <br />.. 8 <br />Manitou Limestone (Om) ............................................................................................. 8 <br />Saguache Sandstone (Cs) ........................................................................................ 10 <br />Pikes Peak Granite (Ypp) .......................................................................................... <br />Structural Geology .................................................................................................... <br />• Seismicity .................................................................................................................. <br />SURFACE WATER AND GROUND WATER .................................................................... 10 <br />11 <br />12 <br />12 <br />HISTORICAL SLIDING ..................................................................................................... 14 <br />2001 RECLAMATION PLAN AMENDMENT - HOLE MINING PLAN (AREA H) .............. 16 <br />HIGHWALL CONDITIONS ................................................................................................ 17 <br />SLOPE STABILITY ...........................................................................................................17 <br />CONCLUSIONS ................................................................................................................ 20 <br />RECOMMENDED FUTURE WORK ..................................................................................20 <br />LIMITATIONS ................................................................................................................... 21 <br />REFERENCES <br />FIG. 1 - EXISTING CONDITIONS <br />FIG. 2 - 2008 ANNUAL REPORT <br />FIG. 3 - ESTIMATED CONDITIONS PRIOR TO FAILURE <br />FIG. 4 - SURFICIAL GEOLOGIC CONDITIONS <br />FIG. 5 - HISTORICAL MASS SLIDING CAUSE <br />FIG. 6 - 1994 PLAN AMENDMENT <br />FIG. 7 - SECTION F-F' <br />• FIG. 8 - SECTION M-M' <br />TRANSIT MIX AGGREGATES <br />PIKEVIEW QUARRY SLOPE <br />CTLIT PROJECT NO. CS17341-125 <br />S:1CS17000-174991CS17341.0 0 011 2 512. Reports1CS17341-125-R1-Final.doc