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<br />2.0 AREA STUDIED
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<br />2.l Scope of Study
<br />
<br />This Flood Insurance Study covers the geographic area of Arapahoe
<br />County, Colorado. The area of study is shown on the Vicinity Map
<br />(Figure 1).
<br />
<br />In addition to the South Platte River, the following streams were
<br />studied by detailed methods and are included in this study: Bear
<br />Creek, Big Dry Creek, Big Dry Creek Tributary A, Blackmer Gulch,
<br />Box Elder Creek, Cherry Creek, Coal Creek, Comanche Creek, Little
<br />Comanche Creek, Coon Creek, Cottonwood Creek, Dutch Creek, First
<br />Creek, Granby Ditch, Goldsmith Gulch, West Tributary Goldsmith
<br />Gulch, Greenwood Gulch, Happy Canyon Creek, Lee Gulch, Little
<br />Creek, Little Dry Creek, Lone Tree Creek, Murphy Creek, Piney
<br />Creek, Prentice Gulch, Quincy Gulch, Sable Ditch, Sable Ditch
<br />Overflow, Sand Creek, Slaughterhouse Gulch, South Tributary to
<br />Slaughterhouse Gulch, SJCD 6100, SJCD 6200, Spring Creek, West Toll
<br />Gate Creek, West Toll Gate Creek Tributary, Unnamed Creek, West
<br />Bijou Creek, Westerly Creek, and Willow Creek.
<br />
<br />The tributary streams studied using approximate methods are as
<br />follows: Upper reaches of Piney Creek and Coal Creek, Lone Tree
<br />Creek, Senac Creek, 1-05-4412 Creek, West Box Elder Creek, Box
<br />Elder Creek, Kiowa Creek, Wolf Creek, Comanche Creek, Little
<br />Comanche Creek, West Bijou Creek" Middle Bijou Creek, East Bijou
<br />Creek, Muddy Creek, and Deer Trail Creek. No development pressures
<br />are foreseen on these streams for the next 5 years.
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<br />
<br />On the South Platte River, just upstream of the City of Littleton,
<br />the COE has constructed Chatfield Dam. The primary purpose of the
<br />dam is flood-control and recreation. The dam is now operational
<br />for flood-control purposes and, therefore, flood hazards downstream
<br />are based on the dam's operation.
<br />
<br />This study also illustrates the flood hazard delineations resulting
<br />from a channel improvement project developed by the COE, Omaha,
<br />Nebraska.
<br />
<br />The areas studied by detailed methods were selected
<br />given to all known flood hazard areas and areas
<br />development or proposed construction through 1991.
<br />
<br />with priority
<br />of projected
<br />
<br />.
<br />
<br />Approximate analyses were used to study those areas having a low
<br />development potential or minimal. flood hazards. The scope and
<br />methods of study were proposed to, and agreed upon by, FEMA and
<br />Arapahoe County.
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<br />2.2 Community Description
<br />
<br />Arapahoe County is located in central Colorado, just south and east
<br />of Denver. The general physical boundary is that of a rectangle 12
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