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0 <br />m <br />0 <br />EXISTING GROUND <br />TOP OF REFUSE <br />VEGETATIVE SOIL <br />FUTURE <br />REFUSE <br />,\ REFUSE �- <br />EXISTING BEDROCK <br />IF A POTENTIAL SEEP LOCATION, <br />EXTEND TRENCH AS NECESSARY <br />STRIPPING <br />REMOVE COLLUVIUM TO BEDROCK UPSTREAM <br />OF BUTTRESS AS SHOWN ON C -04A <br />�FINISHED GRADE <br />TEMPORARY TOP OF REFUSE / <br />DURING FILLING <br />�REFUSE� <br />2U <br />4 RIPPED SEEPAGE <br />INTERCEPTOR TRENCH <br />LINDERMAIN <br />04 SEEe <br />2 <br />IT <br />1 SECTION: UNDERDRAIN UPSTREAM OF BUTTRESS -PHASE 1 <br />C -07 NOT TO SCALE <br />/ <br />1 5H:1v SLOPE WOVEN GEOTEXTILE <br />1/4 " -6" WITH D50= 3" <br />EXISTING BEDROCK FILTER ROCK <br />6 "- 30)l�DRAINAGE ROCK — <br />EXISTING GROUND / <br />TOP OF REFUSE /FINISHED GRADE <br />VEGETATIVE SOIL TEMPORARY TOP OF REFUSE <br />DURING FILLING 1 <br />FUTURE <br />REFUSE -� <br />EXISTING BEDROCK <br />IF A POTENTIAL SEEP LOCATION, <br />EXTEND TRENCH AS NECESSARY <br />COLLUM UM TO REMAIN IN -PLACE <br />REFUSE <br />SEEPAGE INTERCEPTOR <br />O TRENCH <br />S UNDERDRAIN <br />o� SEEe <br />3 SECTION: UNDERDRAIN- FUTURE PHASES <br />C-07 NOT TO SCALE <br />z 14 <br />N <br />2 DETAIL: UNDERDRAIN -PHASE 1 <br />NOT TO SCALE <br />WOVEN GEOTEXTILE <br />STRIPPED COLLUVIUM SURFACE <br />1/4 " -6" WITH D50= 3" <br />FILTER ROCK <br />TG o 0 0 0 6' -30" DRAINAGE ROCK <br />14' I LINDERMAIN <br />4 DETAIL UNDERDRAIN- FUTURE PHASES <br />NNIV NOT TO SCALE <br />NOTES: <br />1. SEEPAGE INTERCEPTOR TRENCHES SHALL BE INSTALLED AS <br />AS SHOWN AND AS DIRECTED BY OWNER OR ENGINEER- <br />2 FILTER AND DRAINAGE ROCK SHALL BE DURABLE MATERIAL. PRELIMINARY <br />NOT FOR CONSTRUCTION <br />(REVISED 07/21/10 <br />I HEREBY CERTIFY THAT THIS PUN, SPECIFICATION. <br />OR REPORT WAS PREPARED BY ME OR UNDER MY <br />DIRECT SUPERVISION AND rwa I AM A DULY <br />UCENSED PROFESSIONAL ENGINEER UNDER THE <br />LAWS OF r TE OF C oRAOO <br />CLIENT <br />BARB <br />Corporote Heodqu ,,, <br />M,nneopol,s, MinnesoL. <br />Ph. 1-600- 632 -2277 <br />P.o�ect ante <br />BARR ENGINEERING CO. <br />4700 WEST 77TH STREET <br />MINNEAPOLIS, MN. <br />55435 -4803 <br />Ph 1 -800- 632 -2277 <br />Fox (952) ", -2601 <br />...ho ".2 <br />Scae <br />AS SHOWN <br />MOUNTAIN COAL COMPANY, L.L.C. <br />SOMERSET, COLORADO <br />RPE EAST PERMIT DRAWINGS <br />WEST ELK MINE <br />BAR R PROJECT No. <br />06 26 -1003 <br />BID <br />Do1< <br />06/9/1 t <br />PERMIT <br />CONSTRUCTION <br />7 I I <br />Dru.n <br />MRP <br />CLIENT PROJECT No. <br />SIGNATURE <br />cnecked <br />PTS <br />UNDERDRAINAGE <br />SECTIONS AND DE S TAIL <br />PRINTED NAVE PHILIP B SOLSEN <br />DATE 07/21/2011 REG No 40664 <br />RELEASED <br />TO /FOR <br />A <br />B <br />C <br />D <br />2 <br />3 <br />Designed <br />BARR <br />DWG NO <br />C -07A <br />REV No <br />A <br />NO. <br />BY <br />HK <br />APP <br />DATE <br />REVISION DESCRIPTION <br />DATE RELEASED <br />Approved <br />PBS <br />