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- • <br />AR <br />~. <br />-- Figure 5. Vertical aerial view of approxmately the same area as shown in Figure 4 (2004 West Elk Color <br />-_ • A~~nal Photo Number 23). This image documents the changes that have occurretl In the Minnesota <br />Reservoir area over the last 41 years. The most signdcant changes are: (1) renewed landslide acts-Ity <br />-- v;nsl of the reservoir has impacted the Dry Fork road. (2) the debris Ilow'mudtlow tongue has now moved <br />-- ~.luser to the mouth of Pond Gulch (north-trending drainage at west edge of photo), (3) the landslideldebris <br />-- flow noAhward across Dry Fork shows renewed activity, and (4) the shear zone and adjacent slide to the <br />-- east, which is located south of the dam is less active than it was in 1963. <br />r~ <br />When mapped on the South of Divide mining area map, the slide on the wuth of the reservoir <br />extends approximately 3,SU0 feet west. 3,HU0 leer east, and 3.400 feet south of the dam <br />spilhcaq (Location I, ;vtap I }. <br />The higher altitude, black and while vertical aerial image of the Minnesota Reservoir area <br />show the following features 1 Figure 4): <br />I A large landslide on the south side of Minnesota Reservoir-the area bounded by scarp <br />areas south of ihd reservoir from the sharp bend in the Urv Fork road west of the dam to <br />the mouth of Deer Creck~:onsists ot` I1 scarps and slumps in the upper areas, 21 <br />renewed movement and shrarintt within the older slide (the area south of the dam and <br />western part of the reservoir and a linear shear gone parallel to the axis of the dum an <br />831-0'x2.621 Wright Water Engineers. Inc. Page 23 <br />Novemher2004 <br />2004 Geologic Hazard Feld Observations <br />South of Dwide Mining Area <br />