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<br />point In the study ~(!a<;~. t'lO Colo~ado d.,d Southern ~ai Iway C~OSS05 <br />liltle [)~y CrOOk on a Ii II with a 40 i'!eh d id("IQt!!~ culvert to Pil,S <br />st~e"m 1 IQ'~s. The t~"cks are ""ov<:, tho St"nca~d Project F load at <br />the ~a II road fill but "DU Id be ov"rtop~ed at ti1e FoJ'lrJ I lJou I'ward <br />overpas~. A II streets cro.si"9 the flood p lill n ,,'OJ Id t,,, I n'lndJ~cd <br />by " Stdndar~ Project Flood. FOder",I lb,leva...d Is t,1e only 5tre~t <br />not flooded or ov"rtoppo~ by In I nt,,~rnoj 1<1'10 ilGg lona I F load. At <br />many 01 t'lo otMr cro~si ngs, limited cipo capacity <;aJ~0~ ovortoppinJ <br />of the rOilds from lloo~s occurri~g as Ire~l:ently i:lS a~ aven'ge of <br />once evory 10 yoars. <br /> <br />8bstruction~ to Flood Flow <br />Tnepip05<lndculvcrt<; In t'he strlld,"crosslngs form the <br /> <br />major obstructions to flow in t~c study rcach. <br /> <br />iablc81lstspert- <br /> <br />i oont elevations lo~ t'Hlse struetur..s and shows thei r relatlonsh ip <br />to tflc I ntcrmcdiatc, ;<e~ioMI nne Sta'1dard Pr<:lj(>ct Flco<is. The alans <br />0... profi Ius On pliJtc~ 27 ~"d 20 show tho fl=1 potontiHI at tho <br />streets <ln~ the rili IWiJY I i fie. T"e f lcod I'otent ia I is ~ Iso i ndi c~t~J <br />0'1 tho ero"" S<'Jction" on ;J lafe 29, '"'h ich 5.""'" w i.j'l~ .]nd d'Jpth of <br />Inten"," laTe "Qgi.vniJl ~nj St"nd~rd Project floods. ThQ Color-~do <br />~nd SQuthern IW i Iw,'y cros~es th" va II,w jLJst do'"n~tre"m of Fe,lerd I <br /> <br />,Iou IOY3~d. <br /> <br />Thtl ch~nnel is particu larly rest"'i ctec ,,1' tn i 5 cross i no <br /> <br />'.:;y ~ 40 i rich Ji~roet"r cu IVflrt. F 10"5 exc""d i ng the Cllp~G I ty 0' 'Iii is <br />cu Iv()~t '.au Id cause t),'ck.""ter 1 loodl ng upstre"m in the ]roa e~t,,~d I ng <br /> <br />fror, FOdoral Bou I.w,'rd upstre~'" to Lowoll l)oulev~rd. <br /> <br />Sea p Illte 2.~. <br /> <br />" <br />" <br /> <br />~ <br />> <br />" <br />g <br />u <br />" <br />" <br />a <br />< <br /> <br />ro <br />'" <br />u <br />ro <br />< <br />" <br /> <br />" <br />w <br />w <br />" <br />U <br />~ <br />'" <br /> <br />nl. <br />o 0 <br />o-"~ <br />+-"---- <br />. <br />o <br />o 0 <br />" <br />c <br />o <br />. <br />0& <br />c <br />. <br />" <br />E <br /> <br />" <br />~" <br />" <br /> <br />c.:"'1 <br />. 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