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<br />~cneeu ~ Biel l ~,mh:ur. Ilirh„~ell \Lnmg Addendum <br />\4 ~I19I It u;. uit:~,.: March I?._'004 <br />Barrier Pillar ~Vidih - ~~'ad~c and ~~ olf Crrek Seams <br />Design Mini n Hei ht, tt <br />Depth o1 Cover, ft 4 5 ~ 6 7 6 7 8 9 10 10.5 15 20 25 <br />50 ?I 3 "s 3 3 3 3 <br />85 c ; 5 S ~ ~ 5 5 5 5 6 6 <br />120 +~ ? 7 ? 7 % 8 8 8 8 9 9 <br />155 r o a 10 ') 1 tl I o 10 11 11 12 13 13 <br />190 10 II II I'_ 11 12 1~ 13 1a 14 15 17 18 <br />225 12 I± W IS 14 IS L> 16 t7 17 t9 21 23 <br />260 I.: IS Iv I7 I6 17 Is 19 20 20 23 26 2B <br />295 IG 17 la 20 19 20 .I 22 23 23 27 30 33 <br />330 I S 19 '_ I 22. .'. I 2.'. ~a 25 26 27 31 35 38 <br />365 ?0 22 '3 25 '? 'S '? 28 29 30 35 39 43 <br />400 "_ :4 2h ~g _'b 2K ''+ 31 32 33 39 44 48 <br />435 _'4 26 'R :U 'K 30 34 3[ 36 43 49 54 <br />470 'c 3R :I +~ 31 ~l ~' 37 35 40 47 53 59 <br />coal : trengtn, psr lU3J ,YI,rL f, tJ w,u u,, ~~ ~ i ~,~ ,w. vvv Nwa,o ,~ <br />c <br />x <br />~ q <br />K <br />g <br />J <br />6 <br />K <br />W <br />K <br />K <br />Q <br />Qm <br />W <br />K <br />7 <br />d ~ <br />w <br />• <br />I' <br />0 50 t00 150 200 :50 300 350 a00 450 500 <br />DEPTH OF COVER, h <br />Figiure ±4 b- F3arricr r~illar design chaps for W'adgr and Wolf Deck seams, <br />Seneca I1-\\ and Yoast Yits. <br />