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<br />The neadwaters of Dry Cedar Crf'f'k I iE' approximately ten ~i 1 c:; southeast <br />of Montrose at an elevation of approximately 9.400 feet. The stream flows <br />ina generally northwesterly direction to its confluence with the Uncompahgre <br />River one mile south of the City. Dry Cedar Creek has a catchment area of <br />approxirute-Iy 21.9 square miles. <br /> <br /> TABLE 1 <br /> DRAINAGE BASIN CHARACTERISTICS <br /> Elevation ~Ft. MSL) Length Basin Area <br />Stream Headwaters onfluence (Mi) (Sq. Mi.} <br />Cedar Creek 9400 5700 24.8 56.3 <br />Montrose Arroyo 7500 5760 10.6 17.8 <br />Dry Cedar Creek 9400 5800 14.3 21.9 <br /> <br />Existing Drainage Systems <br />The location, $ize. and type of structure on Cedar Cr~ek and Montrose <br /> <br />Arroyo are shown in Figure 2. These crossingS<lre generally adequate only far <br />discharges up to the 5-yeilr frequency storm. As a result, hrge portions <br />of the City of Montrose are susceptible to significant flooding during the <br />less frequent storms, particularly if blockage of the crossings 0 ccur. <br />Stream crossing capacities are listed in Table 2. <br /> <br />Urban drainage in the City of Montrose relics primarily on the exist- <br /> <br />ing street system for conveyance of localized runoff. The existing storm <br />sewer system is not extensive and was not the result of long-range ,dred <br />wide plannin9 and is. therefore, not totally consistent throughoutw1th <br />regard to hydrolog1c considerations. <br />WherestOnTI""wering is provided in Montrose, theinl<ltsare fre- <br />Quentlylocatedsoastobeincapableofiflterceptingthedrainage. In <br />addition, many of the inlet drain lines are 8" diameth Jipes which easily <br />clog with debris carried by the storm runoff. Numero,;:;,;ec\.;Qnsofthe <br /> <br />10. <br />