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2005 Subs~donce and Geologic Fleid Observations <br />Box Canyon, West Flehron, Apache Rocks, <br />end South of Dwide Mining Areas <br />Fgure 3. Southeastward wew of a major landslide located within the zone of construction mlluence of <br />State Highway 133 and on the east side of the mouth of Box Canyon. Note the head scarp, the slump <br />block, and the lowar slumps and humpy debris Ilow, which Ilowed to the North Fork. As shown ~n the lelt <br />part of the Image, ilia slWe caused a northward and upldting movement of the highway. <br />'The GPS location of the pine tree (still roughly vertical-Figure d) is 290,-31•im E, d,311.b4?m N <br />llt~1'M, N.4D 19S?, cirlle of error 3-G ml. This GPS Itxation may provide a rough hascline <br />IOl'9llOn to dctcrnunc further Lrndslide movcmcni. <br />The detached blwx;k appears to have ~xcurrcd along lxdnxk fractures that essentially pr<xluceJ <br />one slip pl:ute, The vertical orientation of the pine tree indicates that the slump blrKk is <br />essentially uncntcd as it wax hefore (ailurc, huwrvcr. there may have been backward rotation and <br />forward rotation during the process. <br />83t~032Jf0 Wright Waler Engineers, Inc. Page t2 <br />November 2005 <br />