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1 <br />1 <br />1 <br />1 <br />1 <br />I <br />1 <br />Subsidence Field Observations <br />West Elk Mme <br />August 27-29, 21102 <br />1'hc condition of the slide looks similar to that of last year on August 29. 2001 (refer la <br />Figure 7 of lust y'ear's subsidence rclxrrt). I_:rutdsliJe movement is nut likely txrnrx of the <br />very dn• conditions this summer. <br /> ' <br /> = .e-s- ~_, Figure 15. Northwestward view across Minnesota <br /> f ~ ~ <br /> ~~ <br />-• ~- ` <br />~ Reservoir of landahde, located near the northom <br />- <br />' <br /> f.. abutrnent of lhs reservoir and weal of the mouth of <br /> - y <br /> -- "' <br />~ <br />~~~-- ._ Horse Gulch. <br /> ,. i <br />~.. ~~ <br />' <br /> ~ ' i <br /> <br /> ' <br /> ~' <br />4.3.2 Traverse L-L' <br />1 his trtversc revisits last year's travenc F-P', which begins at Apache 12cx;ks and ends at Urill <br />bite til)W'-3. <br />Subsidence cracks utwve longwull E'anel 13 are filling in and scaling by the forces of erosion <br />and delxrsiliun. <br />(h•crhurden depth to the R-Scant ranges liom 1,350 to 1,150 11. <br />• A subsidence crock, located in thin soil and colluvium ulxrvc the northern edge of mined <br />longwall Panel t 3-A (location N of last August 29, 2001) is as much as G inches wide and 15 <br />li lung, but is more shallow due to inlilling by erosion and deposition (Figure 16. also sec <br />video tirr further details). <br />831 032.570 Wright Water Engineers, Inc. Page 20 <br />lJecember 2002 <br />