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<br />Photographs <br />32. <br />33. <br /> <br />38-43A. <br />38, <br /> <br />39, <br /> <br />40, <br /> <br />43A. <br /> <br />43B, <br /> <br />46-48, <br />46, <br />47. <br /> <br />49-54. <br />49. <br /> <br />50, <br /> <br />~, <br /> <br />CONTENTS <br /> <br />34. <br />35, <br /> <br />16A-35,--Continued: <br />Horizontal laminations in sand deposits at the edge of flow <br />in the Roaring River valley at river mile 3,41------------ <br />Gently-inclined backset crossbeds, interpreted to be <br />antidune structures in a sand splay 0,25 river mile <br />downstream from Lawn Lake dam----------------------------- <br />The alluvial fan formed at the mouth of the Roaring River--- <br />Roaring River alluvial fan taken about 4 hours after the <br />flood (vertical aerial)----------------------------------- <br />Map showing contours of sediments in the Roaring River <br />alluvial fan---------------------------------------------- <br />Graph showing plot of largest particle measured in 3-foot <br />radius every 50 feet down the major flow axis of the <br />dam-break flood on the Roaring River alluvial fan--------- <br />Photographs showing: <br />The single largest boulder thought to have been moved by <br />the flood onto the Roaring River alluvial fan------------- <br />The 17-acre lake formed in Horseshoe Park by the damming <br />of the Fall River (aerial), taken in August 1983---------- <br />Horseshoe Park and the Fall River valley, looking down- <br />valley---------------------------------------------------- <br />Horseshoe Park taken 1 week after the flood, looking <br />upstream from river mile 6.5 (aerial)--------------------- <br />The Fall River channel about 0,3 mile downstream from <br />Cascade Lake dam, showing extensive channel scour--------- <br />A well-developed boulder berm along the right bank of the <br />Roaring River on the large alluvial fan, at river mile <br />4,73, showing the concentration of organic material in the <br />front of the berm----------------------------------------- <br />Graph showing particle-size analysis of matrix from Roaring <br />River alluvial fan boulder berm--------------------------- <br />Photograph showing the front of one step-pool bedform in <br />boulder deposits in the Fall River upstream from Aspen- <br />glen Campground at river mile 7.01------------------------ <br />Sketch showing dam-break model layout for the lakes- <br />stream system--------------------------------------------- <br />Graphs showi ng: <br />Selected modeled and observed hydrographs------------------- <br />Outflow discharge for various times of breach development <br />for Lawn Lake dam and Cascade Lake dam-------------------- <br />Outflow discharge for hypothetical breach width for Lawn <br />Lake dam, assuming 10-minute time of failure-------------- <br />Photographs showing: <br />Flood warning sign at the downstream entrance to the Big <br />Thompson River Canyon near Loveland, Colo----------------- <br />About 0900 MDT on July 15, 1982, looking upstream at <br />washed-out U.S, Highway 34 bridge in Rocky Mountain <br />National Park at river mile 5,3--------------------------- <br /> <br />36, <br />37. <br /> <br />41. <br /> <br />42, <br /> <br />44, <br /> <br />45, <br /> <br />48. <br /> <br />vi <br /> <br />Page <br /> <br />53 <br /> <br />53 <br />54 <br /> <br />55 <br /> <br />56 <br /> <br />57 <br /> <br />58 <br />58 <br />59 <br /> <br />60 <br />61 <br /> <br />62 <br />62 <br /> <br />64 <br /> <br />67 <br /> <br />72 <br /> <br />73 <br /> <br />74 <br /> <br />80 <br /> <br />81 <br />