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FLOOD02688
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Last modified
1/25/2010 6:25:11 PM
Creation date
10/4/2006 11:04:33 PM
Metadata
Fields
Template:
Floodplain Documents
Designation Number
196
County
Eagle
Community
Gypsum
Basin
Colorado Mainstem
Title
Flood Insurance Study - Gypsum, Eagle County, Colorado
Date
3/1/1981
Designation Date
8/1/1982
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />Gypsum Creek, within the corporate limitsi and the Eagle River, from <br />u.s. Highway 24 to the western corporate limits, were studied in <br />detail. The remaining portion of the Eagle River within the corporate <br />limits and Unnamed Tributary to Gypsum Creek were studied by approximate <br />methods. <br /> <br />Those areas studied by detailed methods were chosen with consider- <br />ation given to all proposed construct_ion and forecasted development <br />through 1983. <br /> <br />Approximat_e methods of analyses were used to study those areas <br />having a low development potential or a minimal flood hazard. <br /> <br />2.2 Community Description <br /> <br />The Town of Gypsum is located in western Eagle County, in central <br />Colorado. It is situated along the Eagle River at the mouth of <br />Gypswn Creek. The Town of Gypswn lies 7 miles west of the Town of <br />Eagle and 6 miles east of the confluence of the Eagle and the <br />Colorado Rivers. <br /> <br />The Town of Gypsum had a slow growth rate in the past. The <br />population for 1970 and 1978 was estimated to be 350 and 530, <br />respectively. Due to the projected energy boom, Gypsum should <br />grow to a population between 1500 and 2000 within 10 years (Refer- <br />ence 1). <br /> <br />The corporate limits of Gypsum encompass an area of approximately <br />350 acres. Gypsum is a residential area, with most of the labor <br />force working at various power industries outside of the town or <br />on nearby farms (Reference 1). <br /> <br />The average annual temperature in Gypsum is approximately 42~F, <br />and the average annual precipitation is 11.0 inches (Reference 2). <br /> <br />Gypsum Creek flows north from the mountains around Cottonwood Pass <br />into the Eagle River at U.S. Highways 6 and 24. At Gypsum, the <br />channel is steep and shallow, with a slope of approximately 100 <br />feet per mile. It has a width of approximately 10 feet, and its <br />depth is generally between I and 2 feet. The streambed is silty <br />and fairly straight with a few meanders in the upper reaches of <br />the study. The shallow flood plain, which is well defined in the <br />upper reaches, ranges in width from 100 to 40.0 feet. It is covered <br />with thick brush and cottonwood trees for most of the study area, <br />with scattered brush and grass in the upper reaches. There are a <br />few residential dwellings in the flood plain upstream of the <br />Denver and Rio Grande Western Railroad and upstream of Trail <br />Gulch Road. <br /> <br />In Gypsum. the Eagle River is a large braided channel approximately <br />5 feet deep and 80 feet wide. The slope is approximately 25 feet <br />per mile. The flood plain, which is covered with cottonwood trees <br />and pasture lands, ranges in width from 250 to 1000 feet. <br /> <br />3 <br />
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