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PREFACE Weather Service, Colorado Water Conserv",tlon Bo",rd, Pikes Peak Area Co~ncll of Governments, EI Paso County, Colorado Springs Gazette and numerous citizens In supplying useful data are appreciated and grate- fully acknowledged. All elevations appearing In thIs report are based on U. S. O:last and Geodetic Survey 1929 rooan sea level (1IlS1) datum. An IntormatlvebrOChure, entitled "Floods on Cotton- wood Creek, EI Paso County Colorado" has been prepared to accompany the report. Copies of the brochure, thIs report, and related Infor- matlon can be obtained from the office of the Pikes Peak Area Coun- cll of Governments In Colorado Springs, and from the Color>:ldoWater ConservatIon Board In Denver, Colorado. The Albuque~ue District of the Corps of Engineers will, uponrequest,provldeintEirpretatlon and limIted technical assistance In use of the Information contained herein. This report covers the flood sItuation along Cottonwood Cr'*lk fro", Its confluence wIth i.lonurtlentCreektoa point one mIle upstreamfromBlackf'orestPoad,alllnEIPasoGounf"y,Colorado north of Colorado Springs. AS shown on PI>:Ite I,thesf"udyarea In- cludes 12.7 mIles of stream along Cottonwood Creek and two of Its trIbutaries. The report's contents are deslqned to provide local governmentagencles,oommerclallnterest,andconcernedcltJzensln EI Paso County with deflnl+lve data thatwlll aid In planning the best use of flood prone lands Or otherwise contribute to the solu+lon of local flood problems. Aside from servIng as a tool for Improving flOOd plain management, the report can ~ helpful In locating and designing bridges and roads, establishJngcrlterla for floMproof- I ng, a~j, 1 n some Instances, determi n I ng where pro-ect I ve workS sho.J!dbe consldcr"(ld. The decision I'laklngprocess rnust consider the e~ist;n9 e~vironmental attrlb~tos of the flood plain areas and evalu- ate their probabl~ role In the commu~ity's pl~nned futuro growth. Thereoortincludes In/ormatlon,notonlyonpast floods but also on the ""tura ilnd e~tent 0-1 probable future floods which con be reasonably e~pected on Cotton~d Creek and its tribu~ tarles. T~e report's concl udlng section p,ovJdes guidance on var- Iou. Ilnnd rl~in ma~ege~n+ techniq~es whieh could bc adopted In 0 reallstJc flood damage reduction program. The report does not con- tain specl/Ic pl"nsor recommendations for the solutIon o't flood prob lams as these ~re, I n most I nsfances, the responslb II It v ot localgovernmant. The report was prepor<:,d at the request of the Pikes Poak Area COuncil of Governments, through the State of ColoradO Water COnservatIon Board, under the continuing authorIty granted by Section 206 of the 1960 Flood Control ACT, as amended. The 3sslst~nc~ of th~ U.S. Ndtlcnal Oceanic ~ro Atnosp~c~lc (NOAA) III "