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Spring 2008 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br />• 5.3.1 Location 2 <br />At Location 2, the up midient (cuthank ) side of the road has tailed nunleruuS tulles alono several <br />hundred feet of road on a relatively steer slope of apparently old landslide deposit (Fit.;ure 9). <br />This is the same area observed and descrihed in the spring 2007 Suhsidence ;Moni(orin, Report <br />(See Fil'ure 5 cat that report). This ahpcars to he an area 01' chr0niC cuthank l"'IdUrC duC 10 <br />continuous reactivation of it larger IandSlidC hlock 10 the scluth that waS cut hN- the drill read. The <br />consequence is periodic re"rading of the cuthank to maintain the road. <br />• <br />5.4 Traverse D-D' <br />Traverse D-D' hegins at point (" (01'C-C) a)ove the southern edge Of'Mined LOIl`?wall Panel 1-4 <br />and ends al the fork in the drill roads ahove the southern edge of alined Lon`wall Panel 24. Soil, <br />colluviunl, and local hedrock of the Ohio Crock and Barren Nlcmhers of the Nlcsavcrdc <br />Formation are exposed in the drill road. The soil and colluviulll are locally unstahle or quasi- <br />stahle on the steepest Slopes. <br />• 331-0312.790 Wright Water Engineers, Inc. Page 20 <br />August 2008 <br />Figure 9. Cutbank failure along drill road near the head of Sylvester Gulch.