|
<br />C~"Rk b,anch 0' <0. stream $y~te" '" <0, vicinity 0' <0, ..i;.d
<br />Horse ~ubdivlsion. ", damaging flood~ th"t occur along ", study
<br />re"ch "orn",Uy originate over <0, snUre \IJater~hed. TO, long,
<br />n~rro," ~'~tersheds 0' <0, mein ste"'s and trib.,taries ",ith thai,
<br />
<br />"xten"iv~ co""""rd~l-i"du~t,i,,l <:Jeve:'op'.fll1t ",hiGh ir>d.udBS '" CQr>-
<br />cant,~t~Q" Qf r~ilrQ~d f~Gilitie6, th.~e bridges, and the ,,~t~ork
<br />of streets ~"d othar i~prQvo~cnts us~~i1y found il1 ~n u.b~ni.lad
<br />r8')ion.
<br />
<br />fairly staep slopes are condLJdv~ to f"d risas "nd high peak flo,"s
<br />of short duratiQn. Th~ uv~r~ge slopB i" thB w~tershed is approxi-
<br />~ately 60 feet per mile and, ",ithin the study reach, 37 feet per
<br />~ile. Stra"mbed Blevations v~,y from e.pproxi~~tely 4,670 feet ~t
<br />the mou~h to 4,877 feet ~t the upper limit of the etvdy re~ch.
<br />Flood plain ~idths ~ould vary f,om 1e"6 th~n 100 feet i" th~ upp8r
<br />tea~h du,ing ~" Intermediate RegiQnel Flood to app,Qx1m~tely 2,300
<br />feet ~t B point Juet upstrea~ Qf th~ 11th Street brid~e during ~
<br />St~ndurd Project Flood. P8,ti,,~nt d.ainage areas of Wild Hotse-
<br />D,y Creak are given in Tuble 1.
<br />
<br />TABLE:
<br />
<br />8ridqez Ar,ros~ the Str~~m
<br />The,s are fou, vehicul~, btidY~6 ~nd one rai;.ro~d
<br />b,idg~ acroae ~ild Kcrsa-Dry Creek in the 5.7 mile study t~~ch.
<br />Photogtaphs of the bridges ~ppe~, in Fig'"'''' 3 ~nd 4. The Denver
<br />end Rio G,~"d~ Western Aailtoad bridge ~t Mile 0.33, 11th Street
<br />bridge ~t Mile 0.34, ~nd the 18th Street bridge at Mile 0.85 are
<br />within Pueblo's urb~n area in the iowa, ~ortion of the study reec~.
<br />The lo~ell Avence bridge ~t ~ile 2.7B ~nd U.S. Highway 50 bridge
<br />"t !Hle 3.30 a,e lo~"ted outside Puvblo's northw"st city limit.
<br />Th~ lith St,Bst v~hicul~, bridge and D~"ve, ~r1d Rio
<br />Gra"de '~estern Ae.ilro"d bridge cro~s the creek just ~p.streorn of
<br />
<br />ORAI~A~E AREAS IN ~ATEASHEO Of WILD HORSE-DRY CREEK
<br />Mile
<br />Above
<br />MOJt~
<br />
<br />Dr"in<>ge
<br />Are~
<br />~q. mil,,"
<br />
<br />thB Arke.n""" River confluBnce.
<br />.tructu,es, thair sid~_by_"ide
<br />t~~ '~atBr ",_"f'1"e elev,,.tio,,s.
<br />
<br />Altho~9h thes~ bridges ore ~ep~,~te
<br />proximity has a combined eff~ct on
<br />Un the upst,e"," side, th~ 11th Strset
<br />
<br />Locstion
<br />
<br />~. -'5 "lies bclc.>! ~.S. IIUJY 5D bridgo
<br />
<br />2.55
<br />
<br />69.5
<br />
<br />~ridge i~ a 280_foot 7_span structu,~ with 4_foot concrete guard-
<br />>>"l15. lh ,oad~Gy IOo'.J1rl ~e overtoppac! l.S reel uy I-h" ~t.,nd."_rd
<br />oroJeGt Flnoo: (lV",topoi"" by the Interm,,{ji~ts Region'll flood ~ould
<br />no~ occur. fr.e Denver ~nu ~io ~J,.",,,J~ '~,,~taN\ l1ul:'~r.G~ t~:co-t:,,~k
<br />
<br />O. if. R.G.W. P.R. iJrcd~"
<br />
<br />0.33
<br />
<br />82.8
<br />
<br />ie'1'"r ",-_dy r~~~h. t.,~ ~,,!)I._'.""'"' flood p.L,I." is a"r.'Jpi~(1 by
<br />
<br />btidge is a 200_foot 5-50"n st,ucture with b_foot concrete gc3,u-
<br />,mila that 8"p"r~te the hacks ~nd, "lso, form tha up~tre~'" ~nc
<br />dD~n~ttea'11 f~c~~ of the bridge. The ln~ermediate Regic"al flood
<br />",o"ld not ovsttop th~ top of ths :t~Es., but t~~y would b~ inlm-
<br />detBd 5.R f~st by the St"nd~rd Project flood. ThA co~bin~d h~~d
<br />lessee of the t",o brid~e. OIould bil 5.2 f"flt d~r~ng the Stand~,'d
<br />~,oject flood anu 1.2 feet d~,ing th~ I"termediate Region~l ,;.nod.
<br />The l~th Street bridg~ is ~ lSU~foot 5_""a1\ ~ttuctute
<br />that i. sk~"ed ~D !:Seg.e'",. The 5ta"u"r(j Projact F load ~:>uld ovpr-
<br />tOe the ro~dw"y by 5.2 foot, "hi l~ th.. Inte,msui"te R"<:,i""~: Flo~d
<br />would :ack 0.'1 feet of ov~,t()f'P.J."g the ddvi"~ "",face. Ilclsj
<br />
<br />Develupments in the Flood Pl~i"
<br />Plnteo 3 th,ough 5 eho", the flQod pl~ine of Wild ~ors~_
<br />Dry C"wk f~r the re~ch covored by thi" report. In the uppet
<br />portion of the study reach, dWVB 11111" 1.52 ("pp~oxim"t"ly C.?
<br />",Hea upst,edm from 16th Stred). dovol""",snt in t,~" floQd ~lai"
<br />is limited to CillO b.ldocs. oortions of ho uni"'p,oved roads, and
<br />~ ~to~k pond. The flood pl~in dBvelDp.m~"t i"sid~ PlJ~blo'~ "orth-
<br />",est city lirnit is principally res~da"ti~l e~cept far the Narth-
<br />side Reservait (cff-"~,,r,"d) "nd G:H;;ner PUlOi-' Stntio~. lr, th.,
<br />
<br />'"
<br />
<br />"
<br />
|