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<br /> <br />Whiskey Creek, Dowds No.1, Dowds No.2, and Meadow <br />Mountain (FIgUre 19). <br />This is a very large, old landslide area with an ongoing <br />modern history of small but costly and inconvenient land- <br />slide activity. This case study is of special interest <br />because: 1) it exemplifies the worldwide problem of <br />evaluating the probability and potential consequences of <br />major reactivation of extremely large old landslide masses, <br />2) preliminary analyses of the consequences of potential <br />valley-biocking landslides at this location indicated immense <br /> <br />, <br />MILES <br />\ ,,\ \ <br /> <br />potential damage and disruption to both infl3structure and <br />private property, and 3) the State of Colorado declared a <br />Landslide Alert at this location in 1985, and. as a result, <br />state and local agencies conducted extensive geologic in- <br />vestigations, monitoring, and emeIgenCY exercises. <br />ThrOugh the years, a great deal of highway maintenance <br />related indirectly to the old landslides bas been required at <br />the Dowds Junction location. The soils in the area are <br />seasonally wet and have low strength in many places. The <br />Meadow Mountain landslide south of Dowds Junction on <br /> <br />T <br />S <br />S <br /> <br />R81W <br /> <br />Figure 19. The landslides at Dowds Junction. Colorado (modified from Robinson and Associates. 1975). <br /> <br />45 <br />