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FLOOD07602
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Last modified
1/25/2010 7:12:14 PM
Creation date
10/5/2006 3:06:06 AM
Metadata
Fields
Template:
Floodplain Documents
County
Rio Grande
Community
Monte Vista
Stream Name
Rio Grande River
Basin
Rio Grande
Title
Floodplain Information Report
Date
6/1/1969
Prepared For
Monte Vista
Prepared By
US Army Corps of Engineers
Contract/PO #
&&
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />~treems. These procedures ~erS ~sed in determining the St~ndard <br />Project flood, which i~ defined as the flood that Can be expected <br />fron the most severe combination of meteorological and hydrologioal <br /> <br />age area, the estimated <br />In 6 hours, 0.90 inches <br /> <br />rainfallswer.. <br /> <br />Averaged ovor the drain- <br />calculated ~s 0.50 inches <br /> <br />Poceible l~rqBr floods <br />flood~ largor than the Standard Project flood are <br />possiblo; howevef. the combination of factoro necossary to pfoduce <br />sucI1floodswouldse!donoccuJ:. ;ha considcfetlon of floods of <br />this m~gnitude is mors i1>portent 1n somo ~re,.s then in others, but <br />thay ~hould be considerod in any study. <br /> <br />conditions that is co~cidorcd rOQconubl, cherectGrietic of the <br /> <br />geogfaphical arBa in which the drainage basin is located. excluding <br />8xtrAmAly rer~ combin~tio~e. <br />Sta~dard Proje~t fleod r~infell estimates ~ere made <br /> <br />fot the Rio Grande at SevenmiLe Plaza. <br /> <br />in 12 hours, 2.92 inches in 24 hours, end <br /> <br />~~,~rds of Groat floods <br />,-:,? a",auntand extent of damage ceused by any flOOd <br />depends in general u~~n ho~ much ar~a is fi~~ded, the height of <br />flooding, the ve10dty of ,'1 ow, t.~n rat" of fiop. end tr.<.- duration <br />of flooding. <br /> <br />5.12 inches in 48 hours. Peak discharges of the Standard Project <br />flood vary from 20,000 cubic feat per second near Sevanmilo Plaza <br />to 15.800 cubic feet per second at the Homel~ke Road bridge. The <br />pertial contai~ment-of rlood~et9rs as perched flo~ in old river <br />meandors causes the reduotion in peak dischafges indioated. 5tenM <br />dard Projeot flOOd discharges at opecified rivor mile locations <br />erC shown in Table 7. <br /> <br />Inupperr99ch <br /> <br />aO.23 <br /> <br />1,560 <br /> <br />20,000 <br /> <br />~re~s flooded and Heiqhts of Floodinc <br />ThB areas aleng the Rio Crande flOoded by the Standard <br />Project flood and ths Intormediate Regional Flood afe sho~n On <br />Pllltes 5 through 10. Depths of flo~ ~",n h~ pdi",,,ted fror detailed <br />d"t" chu.."" u" Plal~ 10 H"U fro"" tne "'ater ourface p~ofile8 $~lO.m Orl <br />Plates 11 throu~h 14. <br />The profile~ for the stredm war~ computsd by ueing <br />stfe~m chordctsri~tjcs, topographic ~~P~. ~nd v~lley crObS s~ction$ <br />"hi~h ~'''rA s"rv~y~d in M~y 1968. The overflow $l'e$9 $nd ~lev~_ <br />tiorls shown on the roferenced plates have been determined with an <br />acc"r~cy con9istent with the purposee of this study arld the <br />accuracy of the basic data. <br />The prefilus of thA 5ta,",'lard Project Flood "nd tl1e <br />Intermediate Ragio,",ei Fleod d~p~nd in p~rt "po~ tha d..grflA of <br />"tructur..l oh~I.~"c;tior> ~nd clogging tll~t may oc~ur cll lh~ v~riows <br />bridgea u"rir>g tho flood. TI'uce fadors cannot b" accur"tely <br />forsc~st. ~nd ~orne clQggin~ i$ to b~ expectea ~hich ~~y ~h~nge <br />eotimated flood limits. It WaS ~os~~ed that tha bfid~u Gtru~ture" <br />\IJo~ld sbnd fn~,M~I. <br /> <br />TI\~LE 7 <br /> <br />STA~DI\RD PROJECT flOOD <br /> <br />PEAK DISC~ARCES ON <br /> <br />RIO GRANDE <br /> <br />I o~..tio" <br /> <br />lI\ilel\bove <br />St..toLino <br /> <br />Drllinage <br />Aroo. <br />sq.milee <br /> <br />Disch"rQe <br />c.La. <br /> <br />In lo,,~r roach <br /> <br />73.57 <br /> <br />1,520 <br /> <br />16,800 <br /> <br />Frscusncy <br />It is imprectical to ~ssign a ffequency to thA St~nd~rd <br />P~OjAct Flood. Th~ ecourr~nc~ of ~uch ~ flood would be ~ r~re <br />evant; hO\IJeV&f, it could occur in any year. <br /> <br />" <br /> <br />" <br />
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