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Spring 2008 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br />r, <br />?J <br />Figure 17. En echelon Crack 4 zone, located about 20 feet <br />east of Crack 3 zone, was as much as 6 inches wide and <br />about 150 feet long as exposed at the surface in spring <br />`1007. The surface expression of this crack is now barely <br />v sible, likely the result of vehicle traffic and regrading of the <br />drill pad and roadway. <br />1) /1-1-1-.1-,idm-. bnmc•hirt,? c?r•crc?k located i to ')0 fi,cat e(tst 0/ell ec•hc,/cur Crack ! ;nrre f l i?'rrrr <br />m). This crack IS ah(nlt 150 feet 10111, as much as 6 inches Wi(Ic (arnl nnich \%-ider at the <br />surface (luc tO erc)s1011), and trcn(1s IlortInvard and liorthcast\aar(1 fron) the (11-111 rua(1 to the <br />castcrn rlifCc(I,?e ((Figure I9). T1II crack nwv he an en echelon cxtension (40-ark 4. <br />• 831-032.790 Wright Water Engineers, Inc. Page 29 <br />August 2008