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<br />40 <br /> <br />LAWN LAKE DAM AND CASCADE LAKE DAM FAILURES, COLORADO <br /> <br /> <br />FIGURE 34.-The alluvial fan formed at the mouth of the Roaring River. Note the deep scour into the lateral moraine <br />source materials. <br /> <br /> <br />FIGURE 35.-Roaring River alluvial fan taken about 4 hours after the flood (vertical aerial). Incipient lake formed from <br />the damming of the Fall River shown in figure 39 is indicared by arrow; dashed lines indicate the outline of the alluvial fan. <br />