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<br />The areas initially studied by detailed methods were selected with priority given to all <br />known flood hazards and areas of projected development or proposed construction <br />through 1982, <br /> <br />2.2 Community Description <br /> <br />The Cily of Fort Collins is located in eastern Larimer County, in north-central Colorado, <br />and is approximately 60 miles north of Denver, More specifically, the City of Fort <br />Collins is 12 miles north of Loveland, 15 miles west of Ault, and 9 miles southwest of <br />Wellington, as depicted in the Vicinity Map (Figure 1). <br /> <br />The City of Fort Collins was incorporated in 1873 and has grown rapidly, from <br />approximately 1,376 residents in 1880 to an estimated 56,800 in 1975 (References 6 and <br />7). The official City-estimated 1995 population for the City of Fort Collins is 99,726, <br />The latest V,S. census population estimate for the City of Fort Collins in 1990 is 87,758. <br /> <br />The climate in the City of Fort Collins is typical of the eastern foothills of the Rockies, <br />The mean annual temperature is 480F, with the warmest month being July (70,80F) and <br />the coldest month being January (26.80F). The average annual precipitation in the City <br />of Fort Collins is 14.94 inches (Reference 8). The vegetation found along streams <br />consists mainly of buffalo grass and cottonwood trees. <br /> <br />The Cache La Poudre River study reach is approximately 13.8 miles long. The stream <br />flows southeasterly along an area north and east of the City of Fort Collins, There is a <br />significant amount of development in the Cache La Poudre floodplain between Taft Hill <br />Road and Interstate Highway 25 (1-25) (Reference 9). An estimated 220 structures are <br />located within the floodplain in this area. The channel in the study reach averages 160 <br />feet wide and 7 feet deep, with the gradient varying 28 feet per mile from the upstream <br />corporate limits to State Highway 14 (SH-14), and 16 feet per mile from SH-14 to the <br />downstream corporate limits (Reference 6). The soils within the Cache La Poudre study <br />reach consist of the Fluvaquents-F1uvents Association (Reference 10). <br /> <br />The Spring Creek study reach is approximately 7.7 miles long, The stream is located in <br />the southern half of the City, and flows from west to east, generally following Prospect <br />Street The channel averages 15 feet wide and 4 feet deep, with the gradient varying <br />approximately 31 feet per mile. <br /> <br />As of 1988, the Spring Creek basin is nearly fully developed throughout its entire length <br />from the confluence with the Cache La Poudre River to Taft Hill. Development is <br />primarily residential, but also includes some industrial development near the confluence <br />with the Cache La Poudre River, heavy commercial development along College Avenue, <br />and scattered commercial developments throughout the basin at intersections of major <br />arterial streets, The area south of Drake Road and west of Taft Hill Road is basically <br />undeveloped, with the exception of a mobile home park and some scattered residences. <br />The soils within the Spring Creek basin are typical of the Nunn-Fort Collins-Ulm and <br />Table Mountain-Paoli-Caruso Associations. The Nunn-Fort Collins-Ulm Association <br />predominates in the western portions of the Spring Creek basin, while the Table <br />Mountain-Paoli,Caruso Association is located in the eastern portion of the basin. Soils <br />in the Fluvaquents-Fluvents Association are found primarily along the Spring Creek <br />channel itself. Soils of the Nunn-Fort Collins-Ulm and Table Mountain-Paoli-Caruso <br /> <br />3 <br />