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<br />^rapahoe Road. These include residential areas north ot Araoahoe
<br />Road, sc,)tl'".-"t oeVelOpOlents north 0/ Ol'chdrd and Clarkson Streets,
<br />II S110P.8 i ns centor, f I I trati0n ;:>Iant, sc~ool bu i Id i I1<)s, a church, t,~o
<br />~ark areas, th~ Engle,'If){'A.I p lilyground ane major end Inl nor high''''ays
<br />M'~ stroets.,
<br />
<br />s~'.Jdy roaeros. I n a~di .ioo te toe,. bri c'J"'~' condu Its "r", used ~o
<br />convey th\'l t lows under the stre\'lts. '"'I II I ~mette ,',ven~e <;rOS5e~
<br />Little Clry Creek ty II IQrd. 11o,,,'1;vpr, I r c;enera I, conJu I~ ca~aciti eS
<br />are consi~era"ly less then tho ~riG~~S. T~Jles 2 thrO~Gh t. rr~sor.t
<br />~",rt I 'lent e I eY3t; o..s lor th" structures ~~d -,h",,' H.,,; r re I ,'~ i I)ns" i P
<br />to the Int~rmedlate Re::;ional Flood. T~e plans and p'-olTles 0" plate~
<br />2 through 14 s.,o~ the Ilood potential at each ~tre€t. rT9hw~y, and
<br />~aiirda~ line, Jnd tMo ~sti~ated effeGt~ of the brTdges upon pass~se
<br />of th" I nter",e~Tdt" neU ion~ I and Stilndard Prpjoct rloods. FlooJ
<br />potential Isalsolndic<ltedbythecrosssections,plate515through
<br />17, she',dog depths and wldt>,s at specTf1c locations.
<br />On both 819 ~nd Little Ory \,ree'~1 bridges 01 the Denver
<br />and Rio Srande ,iest~rn ;)e i I ro<'d and r,tc~115on, Toreka ar>d Santa Fe
<br />R" I I'~ay cross the str"ams nflar thei r lCouths and 'o'Ould pass di scharge5
<br />equal toorgreatarthantlle 1 ntenr.ed iate Flood. Therlseinwaler
<br />surlilCll Is not sufficient 'to Inundate the tracks even under StanJard
<br />Project Flood condition,. I.io rai Iroads <;ro,s G~(lenHood Gu Ich.
<br />
<br />'.~e "i<ljer di>mage"b I', I terns i ~ t>,,, Li ttlo Dry Cr~ck. flood
<br />D '~T n "ro loc~ted from Greenwood Vi II"Ue i<.> 11'\0 r:\Outl' of Li ttle :;ry
<br />Creek. These inCluGe bL15in~55 ar,d ro.sid"ntlal ""Tidings 11 h.gle'''ood,
<br />reslduntlJI dovcloptnenh i~ svuurcan Engle"ood, Cherry Hills rr.unicipal
<br />nu i I ~ I ,1g, i.I ch~rch, a large portlQn Qf eh", Cherry HI lis gal f cQlJrS(J,
<br />tncHighli""C:onal,andt>'"CiTyJitch.
<br />
<br />dridges Across the S'lrea<:1S
<br />Twe~Ty-slx str'i'-ets and ~ ;gh'""ys cross tne three strealns
<br />
<br />on bridses, sove~ stroets cr05S oy"r co~duits, and one at a /"rd.
<br />
<br />AllsorvotnebdSi1r"l<cOCsprovldlh'j<r(;cesstocevelopedarcasor
<br />convey i nS li.S. "Ild S'r-3'tu illghwilvS ,",cross the "ilt~r$l1eds. Hr Id~es on
<br />-:-he t.\iljor urtl;ri"s, ; f"\ J,''''Wd I, 'I<lV1; "ilpClC itv to 0"S5 tr.8 I nti\rr'riCc1 lat~
<br />HO'Ji or", I rlooc Dr In),'~er C ischdr'J"5 anu rn,' "rpro~c"es ilrc i n"nd~ted
<br />o~ly by oxtr~"n~ flood5. 0" telO rc'nininq <,tre-ets, Th" ~rid2es C~n
<br />rll:;S C i 5chargo~ rangll1<) trOt"" thos~ '.'ith il 2 percent <<"nUd I CtldnC(l of
<br />
<br />ObstrJctions 'MFlood Fin",
<br />~ajor obstructions 10 flood flows ~re the ro~ds ~~d
<br />t>rldJO". T"QS0 ros~rlct f 100Ns, G~us.Tnn toe '.'~t"r to rise Oil tl'a
<br />I.['str"",," si,l" <lrtll I)v<)rtOj)r'~" (\f to" ~tr""t'Jr" or r(\~rl I imlt~ the>
<br />resrrictivtJ efreet. C1eJd iOS5"S Tnrouqn th.. 'brldJe~ were comr~T".j
<br />by the mathod described In "I-!ydrau I ies of 13~ Id911 '""ter~ays," by th",
<br />Diy Isio1 of l-Iyrlrau lie Research, aur0~u of "uh I ie 'i.""d~, 1%0. W~en
<br />hrldges ~nd apprcach roads werG o~ertope~d, the '>m~Jnkment5 were
<br />considered as broa,l-crested weirs. The "IfFcts 01 these loss~s on
<br />tr.F water 5urf~c", prof 1105 <l~O s>,own on rl"~ns 10 throug>' 14 0/ this
<br />"eport. In cases where brld9c op(lr.1 ngs or c'" Iv~rts are sm~ II rel~-
<br />~Ive to tloed fiows and 5ubj8Ct to blockage hy deorls, t~e a5su~p.inn
<br />was made thet water pa3sn~es ar0 Ineffectlv~ during th~ ~~jor Iloods.
<br />
<br />"'~<::LJrrO()G" ~(\ 1-1... S""nrl~r,i Pr"j~'_-+- ~I=~. ,~~;lrC~c"c_~ TC -:-'.c~C
<br />
<br />s tructuro5 ilrc US"311 y 3t a I O~<'lr e I ()VJ t': On thaI' the bri dr,'! de<:1<, an~<
<br />Mo t loodcd bel ore flows reac!1 tllo cndors Ide 0< the brid~e. I1II
<br />b~idaa~ CJU"C il ~[lc~i~]'ul) d"ri"~ the hl}h", dl~char;l()S \</~Ic,". CQf1-
<br />trl~ut"s to thu flooJi"~1 of the dnproachAs. TI>" c~lyerts, oipes,
<br />"r.J COII,"U i is aro ; i ZBd t(\ pass dl)(~j t ch3n.."i C'D<lC I Iy, wi t" ,ir"'dtAr
<br />dl-scharcW; overtopping tl>e rO"O!l. On. the IO"er n'4C'~ Of LitTle )ry
<br />L;roek, a c;ondlJ it, passes under t'~o 5tree+, Jnd a I~rgo shopo I ng center.
<br />T""lve bridges. iIlClu~<i'l'J t,~u "'~jor '1igr..~"y cr05~it"1(js "1>0
<br />T'~(1 ra i I rr;ad bride";, cross Olg Dry Cn""" ~'jthi n the s.~udy reuc>'.
<br />:iTI>Gt"L.n briJq"s. I nc I ud i "'1 .'''0 "',,":or !l jqh'"",y ,'",~ two "<Ii Iroaj brid~('s,
<br />crl,lss LIt-I" >'i ~re.,,- ~nJ i~5 tribl,tary. (;I-""",.(X}'; 8uIC~I. '.'ithi" t~I"
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