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FLOOD11741
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Last modified
1/26/2010 10:23:59 AM
Creation date
6/4/2008 2:06:07 PM
Metadata
Fields
Template:
Floodplain Documents
Designation Number
277
County
Arapahoe
Community
Arapahoe County and Unincorporated Areas
Basin
South Platte
Title
FIS - Arapahoe County and Unincorporated Areas
Date
8/1/1977
Prepared For
Araphoe County
Prepared By
FEMA
Floodplain - Doc Type
Historic FEMA Regulatory Floodplain Information
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<br />million. The dam spans 14,300 feet across the creek <br />at a height of 140 feet, and now serves the community <br />as a park and water recreation area as well as a retard- <br />ing barrier for floods much larger than the event of <br />June 1965. Cherry Creek Dam was designed and built <br />by the U. S. Army Corps of Engineers to store the <br />Standard Project Flood, which is approximately equivalent <br />to the 500-year event. The dam eliminates the flood <br />potential from 385 square miles of the total 409 square <br />miles at the mouth. <br /> <br />~ <br /> <br />~ <br />~ <br /> <br />With the history of major flooding on the South Platte <br />River through 1933, and with the culmination of planning, <br />design, and construction of the Cherry Creek Reservoir <br />in 1950, the Denver metropolitan area saw the need <br />for an additional flood control structure on the South <br />Platte River, just downstream of the confluence with <br />Plum Creek. During the 1950s, the planning and design <br />for a flood control reservoir were completed for Chatfield <br />Dam. At that time, however, funding was not available <br />to initiate and complete construction. The floods <br />of 1965 changed the minds of many concerning the need <br />for the structure. After assessing the damages within <br />the Denver area at $300,000,000 and the loss of 8 <br />lives, the project was funded and construction began. <br />In 1973, final closure of the dam was made and the <br />facility became capable of storing tributary flood- <br />waters. All the related reservoir improvements, including <br />recreational facilities, are scheduled to be completed <br />and totally operational in 1976. Chatfield Dam is <br />located approximately one-half mile above the City <br />of Littleton corporate limits, in Douglas and Jefferson <br />Counties. As with the Cherry Creek Dam, the U. S. <br />Army Corps of Engineers built Chatfield Dam to store <br />a Standard Project Flood with a maximum outlet release <br />of 5000 cfs. With Chatfield Dam in place, the reach <br />of the South Platte River lying within Arapahoe County <br />will still experience flooding from tributary streams <br />in Littleton and from the west. <br /> <br />To assist the U. S. Army Corps of Engineers with needed <br />flood control measures along the 6.4 miles of the <br />South Platte River which lie adjacent to the City <br />of Littleton, in Arapahoe County, citizens of Littleton <br />voted in 1971 to put up local funds to assist the <br />U. S. Army Corps of Engineers in implementing a mutually <br />satisfactory project for flood control. Presently, <br />the city is in the process of intensive planning on <br /> <br />~ <br /> <br />~ <br /> <br />10 <br /> <br />~. <br />
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