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Memo to Jim Stover <br />March 5, 2004 <br />Page 2 of 2 <br />Excavation of the B-seam box cut indicated approximately 70% of the rocks encountered were less than or <br />equal to the 5-ft cube size. The largest rock encountered in the excavation measured about 22 ft by 12 ft by <br />12 ft. The superintendent in charge of the excavation noted that many times the larger rocks encountered in the <br />excavation were somewhat broken and fractured in to smaller fragments. These larger rocks tended to be more <br />rectangular in shape. <br />Observations on the slope below the channel sandstone outcrop indicated that the majority of the blocks that <br />had apparently traveled the longest distance downhill were those less than 5-ft in overall size. Large rocks in the <br />talus slope tended to be more rectangular in shape. <br />Data from the more detailed field investigation of joint planes on the outcrop are plotted in the diagrams below. <br />Thirty Five measurements were taken from South to North along the outcrop. <br />~= Ak~ove 0, ~~ce Slte C <br />ss Above o+~I-c ;IYe c <br />iuleL scgr*Eq am •n - 3s <br />PosE olgcPgw <br />Ou tc. CTCe = IT< I>. APED LONiOUP 6 P-qxE`_ •n = JS <br />Ilepn tlir = 2i i5 ~~pe~oP: -IJ Con!o,.. [nt = ... pE~ 1'r, o.=p <br />• Page 2 <br />Epu, q,=. <br />Eauo~ q~eo Pos, oo~~~ <br />