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<br />From N. 1st Street to the confluence, the reach is characterized <br />by irregular sections in clayey soils. North of N. 9th Street, the <br />stream meanders moderately. The overbank areas are 1 ined with grasses <br />and some brush, which occasionally extends into the ma'in channel area. <br />Roughness coefficients of .040 and .050 have been assigned the main <br />channel and overbank areas, respectively.. <br />The vegetat i on debri s problem along Mont rose Arroyo is not as <br />severe as along Cedar Creek. The upst ream hea vy overgrowth cond it ions <br />are similar, but less severe on the Arroyo. Howevel", due to the number <br />of crossings within Montrose, and differi ng c~lvert sizes, the effect <br />of the blockage will likely be more pronounced than on Cedar Creek. <br />Small foot bridges and other items which 'will be washed away in town <br />during the major storms will compound the debris problem. The result <br />is potent i a 1 for great damage along the Lllcbani zed port i on s of Mont I'ose <br />Arroyo. <br />A summary of channe 1 roughness coeffi c i ent s as well as cross i ng <br />data may be found in the tab 1 es at the end of th i s report. <br />3. Dry Cedar Creek <br />From the upstream study 1 irnit near Pahgre Road, Dry <br />Cedar Creek flows generally in a northwesterly direction to its <br />cross i ng at Otter Road. The Otter Road cross i ng is a wooden bri dge <br />over a wood planked wall section, with wingwalls. The opening is ]8 <br />feet wide x 17 feet high. A central support pier is provided. <br />This reach of Dry Cedar is characterized by irregular channel sec- <br />tions, with a moderate degree of meandering.. Overbank growth is extre- <br />mely dense, being composed of juniper, cedar and sagebrush. This vege- <br />tation occasionally extends completely across the main channel, <br />obscuring it from view. The significant debris potential is discussed <br /> <br />11 <br />