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<br />
<br />Creek dow~5trea~ to Nevada Avenue. Mowuver, levees in the vicinity
<br />of the M~nicl~al Paws, Pldnt ar~ con~tructeJ, ~t least pclrti~lly,
<br />"with fly."sh ~.hich ""nrlot resist ero.ion fro'll flood'.aters. .here--
<br />fore, altho.~gh not ~how~. 'On the flood<id O:~O pbto~. a pOI:tion of
<br />the ~o~er pla~t area could be floocsd by the lA, if the levees f~il.
<br />as it i; with the Stand~rd P,oject floOG (SP,). The S~f is ph'dieted
<br />to flood somewhat beyo~d ~he arSaS flooded i~ 1935 en~ to a de~th of
<br />2 to 4 feet greater. There.idential ac..smost vulnerable to flooding
<br />in Colorado Springs l1eo gonerally along tho north bank of fountain
<br />Creek between Nevada Ave~u~, Las Vegas Street and Shooks Run. ~cbile
<br />homs parks along Fou~tai~ Creek will be subject to savere flooding in
<br />case of f1ood~ even less than the lOO~ye"r or lRF. lndudod will be
<br />the L&L Trailer Ranch On the north bank just downstream from Neveda
<br />Avenue and the Gerden Valley mobile (~o~s) Park on thR ~outh bonk
<br />bet~een Jenitell Road and South Circle Drivs. Oetwesn U.S. High~ay
<br />85_87 (River mile 45.83) and ths fort Carson Road bridges, along th~
<br />south Or woo~ bank. on exten~ivo develop~~nt of ~obile and pnrmanent
<br />
<br />~hs sxtensha r~l~ro"d b~d divert rloodflo~'5 dovmotre~n, for sevP.tal
<br />tho,j~and feet I:lefore tl\~y ora$~ t.he r~:;l;o~J ~ed and rst"rn ~o th~
<br />Fowntoin :,eeK flood ol~in.
<br />
<br />'Jolo"i~~~s, Rste. of Rise. ~nd D~r~tion
<br />ThE o"c~~rsnca o~ the 1ntermediats RS9iond or St~ndard
<br />Projscl flood ~ould re.ult in ths flood characterl"tic~ shown in
<br />Table S. Thi~ d~te reflects the ~ver~ged me~inum conditione with
<br />height~ of rise, rates of riee, and dur~tions of flooding measured
<br />abeve benkf~ll stege.
<br />,loodflow velociti8~ dspend upon tha gensral w8tsr~ay
<br />configur"tion, and the size, shape, and elope of streambed and over_
<br />bank flow areas. Velocities may rang~ fron th~ maximums appearing
<br />in Tabla 5 to lees than 5D percent of these val"es.
<br />
<br />,
<br />
<br />Obstr~ctions
<br />
<br />type hom~" ~ill ~o flooded extensively by ln~erncdi~to ~egion~l end
<br />Standard Project Floud~. An exi~tiny leves &ystsm in this 8re8 ~ill
<br />provids little protection egainat large floods: 8.g., the 1R, or 5PF
<br />dUB to exter\uivB beckw<oter comJition8. Thss" hvsss. <oS ~dl ao;.
<br />developments, encroach upon the flood plains of fountain Cruuk,
<br />restricting normal passage of floodwaters, therefore lncruaeing
<br />
<br />flood
<br />
<br />Brush and debris w~shing dOW~str8em during flonds often
<br />coil"d ~'Ja.in~l bridges or '~ithin ;;ny restricted fle'~ sr~a, reducing
<br />th~ w~terwey opening8 ~nn nthsrw.i~c impeding floorlflowo Thi9 cr~~tes
<br />a de~ning effect and. depanding upun the degr~e of clogging, Causes
<br />greater b~ckw"br depths with i"'cree~ed ovsrconk floooing. ~atAr
<br />proo~urs, building againet embankments end bridges. Cen then re~ult
<br />in serious erosion, etreos damage, or totel dastruction of the
<br />structure ir>volved. A "~ydr"ulic Jump" can occur dt msny roadw~y
<br />tlpprollcheo to bridges, within the FounL.in Cre~k study ~rae__"nd
<br />mor" notioe"lbiy thro'-'ghout the Jimmy Camp Creek study ~rCa. The jump
<br />occur~ wl1~" high velocity flows meet an obstruction, forcing flow to"
<br />!'1igher elsvation th~n nurrn~lly pr~dlcted. A pronounced incr~~ee in
<br />flo~ velocities usualiy oc,~rs down~tre~m from en obstruction, thus
<br />~xtending th~ fLood's d~mage potential. Obetr~ctive ne~ devslo~nent
<br />rlnd future lend filling in or near the stre~m's floodway oen be e
<br />
<br />hezdrddin this "lrea.
<br />1n the So~th"oor Addition of fountain on the nor~h bank
<br />of Fountain Cr~sk. neat tho propoo~J Stote Highwoy 16 bricge, sever~l
<br />block50f residantial housing sre subject to flooding.
<br />flooding "t fe,,,,t,,in is gan~rally lirr,it..d to ~"st o"r.k
<br />r:oods of SPf ,"09">1 t"ck. involviflg a f,,~ bl",-,k~ 'lOtth or. "mJ ~rl
<br />exter.siv~ ar.", $ou~h of U.S. Hiyh~~l' JS-~7 (R:.v.r mile :;G.S7).
<br />foc.ntuJ.n C,8Gk below the 1"0u~" Qt' Jimmy I.~"P Cr"<Jk
<br />h3S ~.,perh'nc~d 'iery \lttJ~ ~~~r~ad"'e"t, oo~~ept r1;O~ 'h~ nLd P",',ll"
<br />H~<oJ ~r<d the ri&Rc,w R,'ilro~d brld9a.o Th"~" brid~ed c.o~pled ~:.~h
<br />
<br />~"'jor f,;ctur .ie, ."ull.ij;ly""Y lh" adverse affects d"$~rjt>pr1.
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