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2005 SubslUence and Geologic Field Obsoneatlons <br />Box Canyon, West Flatiron. Apache Rocks, <br />and South of Divide Mining Areas <br />Figuro 15. Southwestward wew of Minnesota Reservoir and the large landslide located to the south. The <br />water level is within 2 to 3 fret of the bottom of the spillway. The hummocky topography up to the steeper <br />slopes below the upper bedrock outcrops (upper left) and green {scarp) area to the left of the image. The <br />most actrva part of the landslide s boundod by the south side of the reservoir tnear the Dry Fork road) antl <br />the irregular band of light green scarp area that is located lust above the road on the letl, but is about <br />300 teal above the road near the dam. The linear zone, located east of the south dam abutment is a <br />shear zone located about 100 feel to the east 01 the Cam but is parallel to the trend of the axis of the dam. <br />Landslides west of the dam (middle nghtl took out the Dry Fork road in the mid 1990s. <br />4.17.2 Location 15 <br />L.ucaliun IS Iti h1l'all'd On a Y1dgC w'e1t !1l lI1C' large rockL•tll landslide area. The nxkfull/lundsfidc <br />urea is Irxuted above mrned longwull panel 23. Bused un the cracks ohsenrd near the top of the <br />scarp area ut Location 7 (Figure 16), laxal, spuradir ttarkfull and landslide ucti+ity i. cspecled lr.r <br />amm~uc in this area for at Icast another few yews. <br />The must active looking rockfall/landslide areas prior to the mining of lungwull p;mel ?2 <br />coincide well tvnh the renewed rockfall and landslide ;areas utter lungwall panel 2_' was mined. <br />Therefore, the mining of long+vall panel 2:? triggered renewed ucGvit} in only the must naturally <br />unsWhlc areas. <br />83t 032.710 Wnght Water Engineers, inc. Page 33 <br />Nmernbor 2005 <br />