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PennB Number <br />Class OPertnd f <br />Section/Exhibit: _ <br />! Class O ReWSlon _._._._._._._._._._. _._._._._._._._ .............. <br />1 TYPefSeq <br />Class: @Report O Hydro LOGeneral _ <br />Doc Types -1�L <br />DAPPlication (Coal only) 0 Bond 0 Enforcement O Inspection <br />NOTES: <br />1 WESTERN EXTENT OF SOIL BUTTRESS SHALL TERMINATE ALONG PROFILE LINEAR <br />ACCORDING TO SLOPE CONDITIONS AND AT THE DIRECTION OF THE ON SITE <br />HARDING LAWSON ASSOCIATES REPRESENTATIVE. <br />2. EROSION CONTROL SHALL BE MAINTAINED ACCORDING TO WEATHER CONDITIONS. <br />CONTRACTOR SHALL ESTABLISH SILT FENCES ON THE LOWER AND UPPER PORTIONS <br />OF THE SOIL BUTTRESS. _ <br />3. CONTRACTOR SHALL INSTALL DRAINPIPE. DRAIN PIPE TO BE 4 -HAND PERFORATED <br />CORRUGATED METAL PIPE SLOPED FOR GRAVRY FLOW TO OUTLET <br />4. COMPACTION OF SOIL BUTTRESS SHALL BE 90% OF MODIFIED PROCTOR(ASTM D 1551A) <br />5. CLAY SOILS REMOVED FROM SLOPE DURING GRADING OPERATION SHALL BE PLACED <br />ON SURFACE OF SOIL BUTTRESS AND 'TRACK' COMPACTED TO INHIBIT SOIL EROSION <br />6. BUTTRESS TO BE CONSTRUCTED FROM LOCAL PIT RUN GRAVEL <br />T WEST ELK MINE PERSONNEL SHALL ESTABLISH A SURVEY BENCHMARK FOR CONTRACTOR <br />El EXTENT OF BUTTRESS <br />SECTION LOCATIONS (SEE DRAWINGS 3 .4,5.61 <br />TI he. e..x .c. dw6wxc uwsaxnsxc nTas won +wlnwaxawlnuw <br />•e I}afelrywniwa4nvnFa WlMNdlq uwS CNnSSttII.iES <br />L <br />REVISIONS <br />DATE: <br />NO <br />SAG, <br />�o <br />I <br />SURVEY COORDINATES <br />CT <br />NORTHING <br />FASTING_ <br />SP <br />�s <br />1446053 <br />SP2 <br />P <br />14460"' <br />SP3 <br />40339 <br />1446016 <br />sP4 <br />40M`1 <br />1445988 <br />SP 5 <br />403343 <br />1445964 <br />"A <br />owo <br />I <br />9TAM50 <br />�\ o <br />p. \ <br />W <br />METq ��4. <br />SURVEY COORDINATES <br />CT <br />NORTHING <br />FASTING_ <br />SP <br />�s <br />1446053 <br />SP2 <br />P <br />14460"' <br />SP3 <br />40339 <br />1446016 <br />9TAM50 <br />�\ o <br />p. \ <br />W <br />METq ��4. <br />C.a�, \\ <br />D <br />\Tn MOIO \\ <br />P4 <br />\\ 90 \ <br />PS <br />gn',wo - <br />- <br />�\ <br />SLOPE .. METAL l T <br />\ - IMPACTED AREA 6Ab <br />SceN inlm� III tl A1i4° EDGEOF. R ��� _ GUARDRAIL <br />D' <br />q Harding Lawson Associates MOUNTAIN COAL COMPANY <br />IIIIII VIII VIII VIII VIII VIII IIII IIII <br />001696 <br />ASSHOWN Engineering and SOIL BUTTRESS LIMITS AND DESIGN OF <br />_ _ = Environmental Services <br />--° I35Eaa,3 WTaI WEST ELK MINE SOIL BUTTRESS <br />Sulfa 15)4 <br />(80l) s3s4�U1aN e4m SOMERSET, CO <br />2 <br />SURVEY COORDINATES <br />NORTHING <br />FASTING_ <br />SP <br />403296 <br />1446053 <br />SP2 <br />403321 <br />14460"' <br />SP3 <br />40339 <br />1446016 <br />sP4 <br />40M`1 <br />1445988 <br />SP 5 <br />403343 <br />1445964 <br />C.a�, \\ <br />D <br />\Tn MOIO \\ <br />P4 <br />\\ 90 \ <br />PS <br />gn',wo - <br />- <br />�\ <br />SLOPE .. METAL l T <br />\ - IMPACTED AREA 6Ab <br />SceN inlm� III tl A1i4° EDGEOF. R ��� _ GUARDRAIL <br />D' <br />q Harding Lawson Associates MOUNTAIN COAL COMPANY <br />IIIIII VIII VIII VIII VIII VIII IIII IIII <br />001696 <br />ASSHOWN Engineering and SOIL BUTTRESS LIMITS AND DESIGN OF <br />_ _ = Environmental Services <br />--° I35Eaa,3 WTaI WEST ELK MINE SOIL BUTTRESS <br />Sulfa 15)4 <br />(80l) s3s4�U1aN e4m SOMERSET, CO <br />2 <br />