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Scn:ca Coal ('ompany I light all Atininc :\ddendum <br />MCI1:1 LIt 05.(IUiU,t March IS.?OOd <br /> <br />Barrier Pillar ~~'itlth - tia;;c ('reek tieam <br />Desic3n Minin Hoi ht.lt <br />Depth of Cover, ft 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10.5 <br />50 ~~ ~ ~ 3 3 3 3 3 3 <br />75 I •t ! I t < 5 5 5 5 5 5 <br />100 ~ ri c. n 6 ~• 6 6 7 7 7 ; <br />125 ? x x x x 8 8 9 9 9 9 <br />150 x '+ ~+ ~ Iii In Ill 10 70 tt 71 11 77 <br />175 I~~ to II II II 12 I_ t2 12 13 73 13 74 <br />200 II IZ I? I~ I~ Id I-I 14 75 15 75 16 tc <br />225 I? 13 I•I I•! I~ IS In 16 t7 17 ti 18 tU <br />250 la I~ Ir+ Iv i~ 17 Ix t8 79 19 20 20 <br />275 u+ I' n Ix I`r I+t ]n 20 2t 22 22 23 :=t <br />300 I" Ix I~+ au 'I -'i 23 23 24 Y. 25 u <br />325 I~~ 'n ~,~ <br />_ <br />- ',I <br />~ i5 25 26 27 29 <br />350 "~ ~I `; ~~ 2r 28 29 3C 31 <br />..~n~ ~.,v,~y.,,. rte. ....,. <br />,4 <br />I <br />f <br />r <br />• ~ ~~ <br />~'a~ <br />c0 <br />S <br /><~ <br />-f 20 ~ -, <br />.'. 1 r 1 t <br />0 50 100 t56 ?~!i' ?50 ?CO J5C •100 <br />DEPTH OF COVER. 11 <br />I i~turc ±56- Barrier pillar dc,ign charts tiff tiap--~ ('rrck .cant. ~~:1C1':! .I-\'.' Pit. <br />_ ~~ ~ <br />