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Last modified
11/23/2009 2:02:06 PM
Creation date
6/11/2007 1:12:42 PM
Metadata
Fields
Template:
Floodplain Documents
County
Larimer
Community
Larimer County and Incorporated Areas
Title
FIS - Larimer County and Incorporated Areas - Vol 1
Date
12/19/2006
Prepared For
Larimer County and Incorporated Areas
Prepared By
FEMA
Floodplain - Doc Type
Historic FEMA Regulatory Floodplain Information
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<br />The economy of the town is largely dependent on the summer tourist industry attracted to <br />the Rocky Mountain National Park, located immediately to the west of the community. <br />The town has developed along the Big Thompson and Fall Rivers, two Rocky Mountain <br />streams whose waters rise each year in May, June, and July, carrying the snowmelt from <br />the high mountain peaks to the west. The town's central business district consists of <br />numerous retail and novelty shops located near the confluence of the Big Thompson and <br />Fall Rivers. Areas along upstream reaches of the Big Thompson and Fall Rivers, and the <br />entire Fish Creek basin within the corporate limits, are largely undeveloped. <br /> <br />The City of Fort Collins <br />The City of Fort Collins is located in eastern Larimer County, and is approximately 60 <br />miles north of Denver. More specifically, the City of Fort Collins is 12 miles north of <br />Loveland, 15 miles west of Ault, and 9 miles southwest of Wellington. <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 (Reference 2). The <br />latest U.S. census population estimate for the City of Fort Collins in 2005 is 139,908. <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 62). An estimated 220 structures are <br />located within the floodplain in this area. The channel in the study reach averages 160 feet <br />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-Fluvents Association (Reference 4). <br /> <br />The Spring Creek study reach is approximately 7.7 miles long. The stream is located in the <br />center of the City, and flows from west to east, generally following Prospect Street. The <br />channel averages 15 feet wide and 4 feet deep, with the gradient varying approximately 31 <br />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 Horsetooth Road. 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 soils within the Spring Creek basin are typical of the Nuno-Fort <br />Collins-Dim and Table Mountain-Paoli-Caruso Associations. The Nunn-Fort Collins-DIm <br />Association predominates in the western portions of the Spring Creek basin, while the <br />Table Mountain-Paoli-Caruso Association is located in the eastern portion of the basin. <br />Soils in the Fluvaquents-Fluvents Association are found primarily along the Spring Creek <br />channel itself. Soils of the Nunn-Fort Collins-Dim and Table Mountain-Paoli-Caruso <br />Associations have moderate infiltration rates, while the soils of the Fluvaquents-Fluvents <br />Association have moderate to low infiltration rates (Reference 4). <br /> <br />12 <br />
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