My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
FLOOD04800
CWCB
>
Floodplain Documents
>
Backfile
>
4001-5000
>
FLOOD04800
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/25/2010 6:47:17 PM
Creation date
10/5/2006 12:59:58 AM
Metadata
Fields
Template:
Floodplain Documents
County
El Paso
Community
Colorado Springs
Stream Name
Cottonwood Creek
Basin
Arkansas
Title
Engineering Study of Cottonwood Creek Drainage Basin
Date
8/7/1979
Prepared For
Colorado Springs
Prepared By
Lincoln Devore
Floodplain - Doc Type
Floodplain Report/Masterplan
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
82
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />, <br /> <br />I <br />! <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />! <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />storms connected in a single 24 hour period. This type of occurance <br /> <br />would provide the high antecedent moisture condition III prior to one <br /> <br /> <br />of the high intensity periods, and would produce higher main channel <br /> <br /> <br />flow on the order of 13500 cfs at Academy Blvd. & Cottonwood Creek. <br /> <br /> <br />Main Channel Runoff could vary consider- <br />ably, depending on the type of storm. This condition is considered <br />in the appropriate section of this report. At the present time, this <br />area has been settled only about 120 years and accurate precipitation <br />records kept for less than 70 years. The true 100 year storm for the <br /> <br />area cannot be accurately known with such short term records. For <br /> <br />purposes of this report, the existing City design 100 year frequency ,~, <br /> <br />storm (Type II-A) has been used and is ;ecommended. ~// <br />Typical runoff hydrog~~ were computed <br />for points 6, 9 & 10 in the basin. These points are along Cottonwood <br /> <br />Creek and cOrrespond to the approximate location of Powers (point 6) <br /> <br />and the exact locations of Union Blvd. (point 9) and Academy Blvd. <br /> <br />(point 10). These hydrographs are based on the Type II-A storm and <br /> <br />assume relatively unobstructed flow through the channel. Hydrographs <br /> <br />for individual basins were not constructed except at points of recom- <br /> <br />mended retention ponds. These were necessary to determine approximate <br /> <br />required height and size of the pond. <br />The total basin was divided into three <br /> <br />major internal basins and the outfall point assigned for each. These <br /> <br />major internal basins were, in turn, divided into 40 minor internal <br /> <br /> <br />basins and an outfall point assigned to each. The peak flows were <br /> <br /> <br />routed along the three or four major channels by adding individual <br /> <br />-16- <br />
The URL can be used to link to this page
Your browser does not support the video tag.