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See detail sheet for ,modifications / <br />to the sedimentation ponds- <br />ON 8 X00 <br />P ! / <br />6 +00 �— ACCESS ROAD ' <br />N }0 0 <br />D BEGIN ROCK LINED <br />CHANNEL DOWN PILE FACE END TOP OF PILE SIDE <br />DRAINAGE CHANNEL <br />—TIE UNDERDRAIN INTO END OF EXISTING L'RAIN <br />0 0 { h 1 <br />4 + 00 <br />1. <br />1 roo 7490 - 5 YR ELEVATION — CLEAN WATER DIVERSION DITCH ! <br />i <br />o <br />4`S H 4(7 C v; <br />U OU ° / FRJENCH DRAINS <br />CONNECT TO EXISANGI u 04 <br />EASTSIDE CHANNEL z; Q <br />,c op \ o <br />j +IW <br />o' <br />0 4; <br />TO YARD <br />AP OXIMATE LOCATION AND SIZE A ` , INS <br />CONNECT i OF. THE COVER /FILL STORAGE PILE � <br />i)RAINAGE SYS16V �� FOR THE 5 YEAR ELEVATION OF THE <br />WASTE ROCK PILE (V= 7000 <br />18+ \ <br />� I APPROXIMATE EXISTING PILE (1997) /ND TOP of PILE SIDE <br />DITCH INTERCEPTS CONTAMINATED <br />1 MOVE TO CONFORM TO , DRAINAG CHANNEL — UNDERDRAIN RUNOFF FROM WASTE PILE AND <br />f , PROPOSED PILE GEOMETRY <br />BEGIN ROCK LINED NATURAL AREA TO SOUTH AND BEGIN DITCH <br />CHANNEL DOWN PILE FACE DIVERTS IT TO SEDIMENTATION PONDS <br />S =1% <br />l <br />I j <br />i I I <br />i I <br />x X FENCE X x FENCE ;< <br />I� <br />I <br />i00 REG / <br />; iM <br />/OVAL ��a+�' `• <br />iilflif5• ?n23«' <br />PLAN VIF W OF IVIII VE WASTE PILE <br />LIST OF PROPOSED FEATURES <br />1. WASTE PILE <br />2. CLEAR WATER DIVERSION DITCH (NORTH SIDE) <br />3. CLEAR WATER LINED DITCH DOWN NORTH FACE OF PILE <br />4. CONTAMIN. WATER INTERCEPT DITCH (SOUTH SIDE) <br />5. CONTAMIN., LINED DITCH DOWN SOUTH FACE OF PILE <br />6. UNDERDRAIN <br />7. ACCESS ROAD <br />8. MODIFICATIONS TO PONDS: CONNECIDR PIPE, LOW <br />OUTLETS, SPILLWAYS <br />I <br />WASTE PILE GEOMETRY <br />PILE VOLUME = 1,022,000 CUBIC YARDS <br />FACE SLOPE: 2.5:1 <br />FACE HEIGHT = 200 FT <br />TOP OF PILE SLOPE = 1Z <br />TOP OF PILE CROSS SLOPE = 27o <br />FACE TOE ELEV = 7415 FT <br />FACE TOP ELEV = 7615 FT <br />TOP END OF PILE ELEV = 7626 FT <br />PLACEMENT OF FILL <br />1. THE WASTE PILE WILL BE CONSTRUCTED IN STAGES EXTENDING <br />UPVALLEY AS NEEDED. <br />2. REAOVE AND STOCKPILE ALL TOPSOIL PRIOR TO DEVELOPMENT <br />OF A NEW STAGE. <br />3. MINE WASTE SHALL BE PLACED IN LIFTS NOT TO EXCEED 12" -18" <br />4. EACH LIFT SHALL BE COMPACTED TO 90% OF THE MAXIMUM DRY <br />DENSITY OF 91.0 PCF, .OPTIMUM MOISTURE CONTENT OF 12 %. <br />/ <br />I � <br />f <br />i <br />SCANNED <br />RECEIVED <br />JAN 1 4 1998 <br />Division of Minemfr a. lentaav <br />'NATIONAL KING COAL MINE <br />�_m lph ?. <br />Oa O!m z <br />8, � - <br />a - MINE WASTE PILE DESIGN J <br />— n HESPERUS, COLORADO <br />o ! � <br />o ! <br />' PLAN LAYOUT — <br />uq <br />o <br />M f <br />I <br />NATIONAL KING COAL MINE ENGINEERING <br />4424 CR 120 <br />HESPERUS CO DON R MAY P.E. 970 - 385 -7504 <br />PREPARED FOR COLORADO STATE <br />DIVISION OF MINERALS AND GEOLOGY <br />SCALE: I" = 100' DATE: 12/30/97 SHEET: I <br />fags 8/1707 IIIIIII Hill IIIIIIIIIIIIIIIIIIIIIIIIIIII <br />00964 <br />0 100 200 <br />SCALE: 1 in = 100ft <br />