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<br />The upper reaches of Montrose Arr~yo lie approximately 7 miles <br />east of Montrose. The study reach for the Arroyo begins near Ogden <br />Road, approximately 2 miles southeast ~f the City, running through <br />Montrose to the confluence of Montrose Arroyo with Cedar Creek. Within <br />the upper, non-urbanized portion of the study reach, channel sections <br />are typically of significant capacity w'ith moderate to 11eavy overbank <br />growth. The vegetal growth along the banks can contribute to debris <br />generation. The Arroyo flows through the City in a channel whose <br />numerous crossings are only marginally adequate for low flow storm <br />runoff. Major portions of the City are, therefore, susceptible to <br />potentially severe flooding at relatively frequent intervals. <br />The upper reaches of Dry Cedar Creek lie approximately 10 miles <br />southeast of Montrose. The stream flows in a genel'ally northwesterly <br />direction to its confluence with the Uncompahgre River one mile south <br />of the City. The study reach of this str'eam lies between the <br />confluence and approximately the intersection of Kinikin Hts. Road and <br />Pahgre Road. Within the study area, the reach is typified by channels <br />of significant capacity with generally heavy overbclnk growth which fre, <br />quently extends into the main channel conveyance ar'ea. J~uch debris is <br />generated in the upper reaches of the watershed, derived primar'ily of <br />dried sagebrush and other vegetation, and some by..product of sheep <br />grazing. <br />C. Debris <br />As discussed previously, there exists a debris problem along <br />the study streams. The flooding in many areas extends into the heavily <br />vegetated overbank areas. The results are that any floatable or ero- <br />dable debris may be picked up and carried downstream. In addition to <br />this natural debris, the smaller bridges and other structures which may <br /> <br />2 <br />