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0 <br />04 X <br />l� <br />>I/ <br />A I <br />I, <br />8 i 'I <br />ti <br />I <br />11 �► <br />I i i <br />/ I <br />I/ 1 <br />1 � <br />I i � <br />dj <br />rl <br />I I <br />LEGEND <br />I� I X <br />,, 6O <br />/ / I yak � \1 <br />It <br />11, 1 <br />, <br />X <br />B II <br />POSSIBLE I 11 <br />TEMPORARY <br />1 COAL STORAGE 1 <br />LOCATION tERRACE I OtOb,I 1 <br />41 p91i <br />X of <br />y yy <br />/ <br />l II <br />MINE BENCH <br />GA,\ <br />�%1I \ <br />I <br />A \� <br />MINE BENCH FILL AREA I <br />TOE OF FILL <br />CREST OF FILL <br />7120 CONTOUR ON SURFACE OF FILL <br />7180 APPROXIMATE CONTOUR ON MINE BENCH <br />AND HAUL ROAD <br />— <br />7140— CONTOUR ON EXISTING GROUND SURFACE <br />TERRACE <br />�ep <br />LAN VIE <br />s\ <br />�\ <br />I <br />i <br />I <br />I <br />I <br />1I <br />1 <br />i 1' <br />11 <br />1, <br />►1 <br />1 <br />1 1 <br />1 <br />1 I I I LIERT <br />T 1 1 <br />I� APPROXIMATE FOUNDATION 11 <br />PIEZOMETER LOCATION <br />I� � \11111111 � '1 <br />EXISTING ROAD TO <br />II 1111 BE RELOCATED ACROSS; 1 <br />1 MINE BENCH FILL,IF I <br />NEEDED <br />I <br />I 1 <br />II <br />I I <br />II ( <br />I 1111 <br />1 I I 1111 <br />---- - - - - -- LIMITS OF MINE BENCH <br />_ - - - -- EXISTING ACCESS ROADS <br />LOCATION OF CROSS— SECTIONS THROUGH FILL <br />GENERAL NOTES <br />1) PRIOR TO FILL PLACEMENT, SCRIP TOPSOIL AS NECESSARY AND STORE IN DESIGNATED 'TOPSOIL STORAGE AREA. <br />2) TEMPORARY CREEK DIVERSION AND PERMANENT CULVERT FOR ROATCAP CREEK TO BE DESICNF.D RY OTHERS PRIOR TO PLACEMENT OF <br />ANY FILL IN VALLEY BOTTOM. <br />3) PREPARE FOUNDATION SOILS TO INSURE FILL STABILITY. ALL TOPSOIL, DEBRIS, EXCESSIVELY WET OR SOFT SOIL, ORGANIC <br />MATTER, ROOTS, AND PERISHABLE OR OBJECTIONABLE MATERIAL IN THE FILL FOUNDATION SHALL, BE REMOVED. THE DEPTH OF <br />STRIPPING SHALL NOT BE LESS THAN 12 INCHES AND MAY EXTEND TO BEDROCK IF NECESSARY TO REMOVE ORGANIC OR EXCF.S- <br />SIVELY WET SOILS. THE MAXIMUM DEPTH OF STRIPPING SHALL BE DETERMINED BY AN EXPERIENCED GEOTF.CHNICAL ENGINEER. <br />4) CONSTRUCTION SHALL COMMENCE AT THE DOWNSTREAM TOE OF THE FILL. CONSTRUCTION SHALT, PROCEED BY PLACING FILL IN <br />APPROXIMATELY HORIZONTAL LAYERS WHICH SHALL BE COMPACTED IN ACCORDANCE WITH THE SPEC[FICATIONS. <br />5) APPROPRIATE DESIGN AND CONSTRUCTION MEASURES SHALL BE TAKEN TO PREVENT SATURATION OF FILL OR FOUNDATION SOILS DUE <br />TO LEAKAGE FROM THE PROPOSED CULVERT. <br />6) SURFACE RUNOFF FROM THE SURFACE OF THE FILL WILL BE CONTROLLED ACCORDING TO THE CONSTRUC'TU)N DRAWINGS. <br />7) THE FILL OU'TSLOPE SHALL NOT EXCEED 2.500:1.0M OR AS PROVIDED IN THE CONSTRUCTION DRAWINGS. <br />8) THE FILL OUTSLOPE SHALL BE COVERED WITH TOPSOIL AND TREATED AS PROVIDED IN THE CONSTRUCTION DRAWINGS. <br />9) GROUND —WATER PRESSURES IN THE FOUNDATION MATERIAL AND BENEATH THE CULVE'R'T WILL BE MONITORED DURING AND SUBSEQUENT <br />TO CONSTRUCTION TO VERIFY THAT EXCESS PORE WATER PRESSURES ARE NOT GENERATED BY CONSTRUCTION AND DO NOT DEVELOP <br />SUBSEQUENTLY. IF WATER PRESSURES EQUIVALENT TO AN EXCESS HYDROSTATIC HEAD OF 15 FEF.'T ABOVE 'THE INITIAL. HYDRO- <br />STATIC LEVEL RECORDED ARE DETECTED, THE STABILITY OF THE FILL SHALT, BE RE— EVALUATED AND APPROPRIATE DESIGN AND <br />CONSTRUCTION MEASURES IMPLEMENTED WITHOUT DELAY. <br />10) IF, DURING CONSTRUCTION OF THE FILL, GROUND WATER IS FOUND IN THE EXCAVATION FOR THE FILL, WITHIN THE FILL TOE <br />AREA, A TOE DRAIN WILL BE INSTALLED BETWEEN THE FILL, AND FILL FOUNDATION. <br />7200_ B <br />w <br />w <br />LL <br />0 7100 <br />I- <br />a <br />w <br />W <br />w <br />7000 <br />W <br />W <br />W <br />w <br />1. <br />0 7100 <br />F <br />> <br />W <br />W <br />W <br />7000 <br />NOTES FOR STABILITY SECTION A —A' <br />ELEV. <br />2.5 <br />2_ o FT.. I.O� <br />ELEV 2150 <br />IOIi <br />EXISTING <br />GROUND SURFACE <br />0 50 100' <br />SCALE I" = 50' <br />HORIZONTAL AND VERTICAL <br />COAL <br />d =90 ptf <br />m=37� <br />C =O <br />HAUL <br />ROAD <br />30 FT. <br />COMPACTED FILL <br />I <br />AL <br />7180 <br />1.0 TERRACE <br />20 FT. <br />48" DIA. CSP CULVERT <br />APPROXIMATE FOUNDATION <br />PIEZOMETER LOCATION <br />NOTE: FOUNDATION PIEZOMETER <br />TO BOTTOM AT TOP OF BEDROCK <br />SECTION B -B' OF MINE BENCH FIL <br />COMPACTED FILL <br />d =1200 <br />\FI(i2300 <br />COLLUVIAL SOILS <br />BEDROCK <br />0 50' 100' <br />IIIIIw- 0=101 <br />SCALE 1" = 50' <br />HORIZONTAL AND VERTICAL <br />PHREATIC SURFACE FOR <br />EFFECTIVE STRESS ANI <br />2.5 <br />\� 1.0 <br />F5 =0. <br />ALONG SECTION A -AI <br />PEME <br />*0 158 <br />.r <br />N� :FS <br />7120 <br />Iue <br />-7200 <br />-7100 <br />-7000 <br />RECLWATlON DM ION <br />q' —7200 <br />FAILURE CIRCLE AND MINIMUM F.S. ASSUMING <br />COLLUVIAL SOILS REMAIN UNSATURATED. <br />SHORT -TERM (INITIAL) LOADING CONDITIONS, <br />TOTAL STRESS ANALYSIS <br />COLLUVIUM 0 = 0, C - 3000 PSF <br />FAILURE CIRCLE AND MINIMUM F.S. ASSUMING <br />SATURATION OF COLLUVIUM. <br />SHORT -TERM (INITIAL) LOADING CONDITIONS, <br />TOTAL STRESS ANALYSIS <br />—7100 <br />COLLUVIUM 0 = 0, C = 1300 PSF <br />1) SECTION A -A' WAS SELECTED AS BEING THE CRITICAL STABILITY SECTION OF THE MINE BENCH FILL. `1i����c'�.� O"Q,;��� <br />2) STTABIL[TY ANALYSES PERFORMED USING SIMPLIFIED BISHOP FOR CIRCULAR (FILL) FAILURE SURFACE AND DATE CHECKED REVISION (lIIII111111111U�� <br />SARMA FOR NON- CIRCULAR (FILL / COLLUVIUM CONTACT) FAILURE SURFACE. /23/ MB, GM I COMPLETED STAB. ANAL. a RECOMMEND. <br />COLLUVIAL SOILS <br />BEDROCK <br />7000 <br />COLORADO WESTMORELAND W. <br />P.O. BOX 1299 <br />PAONIA, COLORADO 81428 <br />ORCNAPb VALLE'/ LA-I Po,Q7ALS De-SIGNs <br />_I` No. 5 OF /o <br />MINE BENCH FILL <br />Designed b MSN SHEET NQ <br />9 y` JHM DATE: 8/14/86 �]Q GOId @f Associates <br />Drawn by: l /7J CONSULTING GEOTECHNICAI ENGINEERS SOF 10 <br />Chocked by: MB SCALE: AS NOTED Q 17301 WEST COLFAX AVE. SUITE NO.275 <br />Approved by: GM GOLDEN. COLORADO 20401 <br />863-2032 <br />009gg2 <br />POSSIBLE TEMPORARY COAL <br />` <br />^STORAGE PILE LOCATION <br />A <br />1 <br />/ <br />A <br />7200 <br />`� 20 FT <br />-7200 <br />�� <br />\ <br />/ / \ \ \ \ \\ / <br />ELEV. 7180 <br />\ <br />2.5 <br />1.0 <br />\\ <br />TERRACE <br />COMPACTED <br />20 FT. <br />,v <br />FILL <br />/ \�� <br />, <br />LLJ L` <br />COLLUVIAL / \ \ / \ \ /i <br />ELEV. 7120 <br />\ \� <br />? <br />Z 7100 <br />S \\ <br />OILS \ \ \, <br />\ / <br />2.5 <br />—�I.o <br />—7100 <br />\\ <br />\\` <br />Q <br />\ \\ /\ <br />EXISTING <br />GROUND SURFACE <br />LLI <br />\ � \� <br />//� ,,III' <br />0 50' 100' <br />PI <br />SCALE 1 " =50 <br />HORIZONTAL AND VERTICAL <br />7000 <br />SECTION A -AI OF <br />MINE BENCH FILL <br />-7000 <br />7200_ B <br />w <br />w <br />LL <br />0 7100 <br />I- <br />a <br />w <br />W <br />w <br />7000 <br />W <br />W <br />W <br />w <br />1. <br />0 7100 <br />F <br />> <br />W <br />W <br />W <br />7000 <br />NOTES FOR STABILITY SECTION A —A' <br />ELEV. <br />2.5 <br />2_ o FT.. I.O� <br />ELEV 2150 <br />IOIi <br />EXISTING <br />GROUND SURFACE <br />0 50 100' <br />SCALE I" = 50' <br />HORIZONTAL AND VERTICAL <br />COAL <br />d =90 ptf <br />m=37� <br />C =O <br />HAUL <br />ROAD <br />30 FT. <br />COMPACTED FILL <br />I <br />AL <br />7180 <br />1.0 TERRACE <br />20 FT. <br />48" DIA. CSP CULVERT <br />APPROXIMATE FOUNDATION <br />PIEZOMETER LOCATION <br />NOTE: FOUNDATION PIEZOMETER <br />TO BOTTOM AT TOP OF BEDROCK <br />SECTION B -B' OF MINE BENCH FIL <br />COMPACTED FILL <br />d =1200 <br />\FI(i2300 <br />COLLUVIAL SOILS <br />BEDROCK <br />0 50' 100' <br />IIIIIw- 0=101 <br />SCALE 1" = 50' <br />HORIZONTAL AND VERTICAL <br />PHREATIC SURFACE FOR <br />EFFECTIVE STRESS ANI <br />2.5 <br />\� 1.0 <br />F5 =0. <br />ALONG SECTION A -AI <br />PEME <br />*0 158 <br />.r <br />N� :FS <br />7120 <br />Iue <br />-7200 <br />-7100 <br />-7000 <br />RECLWATlON DM ION <br />q' —7200 <br />FAILURE CIRCLE AND MINIMUM F.S. ASSUMING <br />COLLUVIAL SOILS REMAIN UNSATURATED. <br />SHORT -TERM (INITIAL) LOADING CONDITIONS, <br />TOTAL STRESS ANALYSIS <br />COLLUVIUM 0 = 0, C - 3000 PSF <br />FAILURE CIRCLE AND MINIMUM F.S. ASSUMING <br />SATURATION OF COLLUVIUM. <br />SHORT -TERM (INITIAL) LOADING CONDITIONS, <br />TOTAL STRESS ANALYSIS <br />—7100 <br />COLLUVIUM 0 = 0, C = 1300 PSF <br />1) SECTION A -A' WAS SELECTED AS BEING THE CRITICAL STABILITY SECTION OF THE MINE BENCH FILL. `1i����c'�.� O"Q,;��� <br />2) STTABIL[TY ANALYSES PERFORMED USING SIMPLIFIED BISHOP FOR CIRCULAR (FILL) FAILURE SURFACE AND DATE CHECKED REVISION (lIIII111111111U�� <br />SARMA FOR NON- CIRCULAR (FILL / COLLUVIUM CONTACT) FAILURE SURFACE. /23/ MB, GM I COMPLETED STAB. ANAL. a RECOMMEND. <br />COLLUVIAL SOILS <br />BEDROCK <br />7000 <br />COLORADO WESTMORELAND W. <br />P.O. BOX 1299 <br />PAONIA, COLORADO 81428 <br />ORCNAPb VALLE'/ LA-I Po,Q7ALS De-SIGNs <br />_I` No. 5 OF /o <br />MINE BENCH FILL <br />Designed b MSN SHEET NQ <br />9 y` JHM DATE: 8/14/86 �]Q GOId @f Associates <br />Drawn by: l /7J CONSULTING GEOTECHNICAI ENGINEERS SOF 10 <br />Chocked by: MB SCALE: AS NOTED Q 17301 WEST COLFAX AVE. SUITE NO.275 <br />Approved by: GM GOLDEN. COLORADO 20401 <br />863-2032 <br />009gg2 <br />