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A severe rain storm on August 17 and 18, 1979, caused major flood damage in urban areas of east Odgen, Utah. At least 3.85 cm of rain fell in a 7-hour period. The severity of damage was dramatically increased by water diverted from the Brigham-Ogden Canal, when it was clogged by a debris flow in the vicinity of Third, Taylor, and Polk Streets. The purpose of this investigation is to ascertain the sequence of events that followed the storm, and to quantify the processes insofar as possible. An inspection of the area on September 21-25, 1979, and the subsequent study, indicated that the principal cause of damage was a combination of two factors: (1) channelization of runoff and erosion of off-road vehicle (ORV) trails clogged the Brigham-Ogden Canal, and (2) the diverted canal water eroded a notch in the alluvial fan and terrace deposits below, which then combined with the debris eroding from the ORV trails to bury downslope structures.


United States Geological Survey Open-File Report # 81-258. SuDocs call # I 19.76:81-258.