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2004 Geologic Hazard Fie.d Observations <br />Sou;h of D~.vide Alining Area <br />• <br />Figure 5. Vertical aerial view of approximately the same area es shown in Figure 4 (2004 West Elk Cobr <br />• Aerial Photo Number 23). This image documents the changes that have occurred in the Minnesota <br />Reservoir area over the last 41 years. The most significant changes are: (1) renewed landsllde activity <br />,test of the reservoir has Impacted the Dry Fork road. (2) the debris flowlmudflow tongue has now moved <br />Loser to the mouth of Pond Gulch (north-trending drainage at west edge of photo), (3) the landsllde/debris <br />(low northward across Dry Fork shows renewed actlvRy, and (4) the shear zone and adiacenl slide to the <br />east, which Is located south of the dam is less active than it was In 1963. <br />When mapped nn the South of Divide mining area map, the slide on the south of the mservoir <br />extends approximately 3,800 feet west, 3.800 feet east, and 3.400 feet south of the dam <br />spillway (Location 1, Map 11. <br />The higher altitude, black and white vertical aerial image of the Minnesota Reservoir area <br />show the following features IPigure 4); <br />I. A large landslide on the south side of Minnesota Reservoir-the area bounded by scarp <br />areas south of the reservoir from the sharp bend in the Dry Port: road west of the dam to <br />the mouth of Dcer Creek consists of; 1) scarps and slumps in the upper areas, 2) <br />renewed movement and shearing within the older slide (the area south of the dnm and <br />western pan of the reservoir and a linear shear zone parallel to the axis of the dam on <br />• <br />ti3t-032.621 Wright Water Englnaere, Inc. Page 23 <br />