FLOOD09044 - Laserfiche WebLink

Home Browse Search

Floo~ Occurren~es GOOONIGHTARROYD Investiq~tiDn indic~ts8 that flood. occur on Dry Crsek ~'i th "pprGximatsly the ~am.. fr~q~..ncy es or> Wild Hor~..~D"Y Cr..~k. n",se flo~ds ~$u~lly originate in Savara storm" ~"per~ ianced d~ring the l~tu ~pring or su~~er months a. dssoribed previO\Jsly "nGsr "flood o~currence8" pvrtaini"'J to Wild Horse~ Dry Cre~k. The physi~el feeturas of the Dry Creek ~ater8h8d can p~ad~ce the rspid concentration of rwnoff th~t char~cte~iz~s flash f' . ~oodo of high pe~k flcw~, ~m~ll volumes, ~~d shoot dur~tion~. flooded Are,,". flo~d Profilos, and Cr08~ Section, Plate 6 shoWG the approxim~t~ ~r~a3 ~long Ory Creek th~t would bs inundated by tho Stand~rd Pooject Flood and the Intermediate Regional flood, The actual limits of these ovar~ flow a"M.S on the gro<md llIoy vaoy slightly f..OO1 those shown on ths map becau~" the 10~foot conto~r int"rv~l and scals of the map d~ not permit preoi"e plotting of the flooded area boundaries. Pl~tB 10 shows the high wstor profiles for the Stan- d31'd Projer;t >md Inter~edide Regional FlOOd;, il.ccLo"te esti~~t..s of w~t"r s~of~ce elevations m"y be obt~inod froo, t.hese plat~s. Plate 12 ,ho,"s tl'O COO"" S<lcU"ns Unt "'to typical of the l~ ","ction" obtained on Dry Coeek in the roach in\iesti_ The Stre~m ~nd It~ Valley Goodnight Arroyo 1s an ephe~eral south~b~nk tribut~ry of the Arkansas Ri\ier th~t originate" on the high plaine sout.h_ we.t of Pueblo, The triangular-shaped wateoahed spans a di$t~nc. of 4.9 mIl.s f~om the he~dweteos to the ~outh. It has a maximum width of 2.9 milss and J d~airL~ga araa ~f 5.9 square milee, Elavations in the watershed vaoy from 5,330 feat ~t the he~dwatars to 4,7CB feet at the Arkana~" River cGnfluance. Coodnight Ar~oyo'e longest br~nch or1gin~ts" 8ppooxi~ ",ately 1.4 miles south of State Highway '16 fro~ whence it meenders in a northerly dire~tion. boundary, immediatoly west J~st outside Pu~blo's existing western of the G~dnight swbdivision arsa, the arroyo passes <.Lnd~r Bes~e"er OItch "nd State Hi~h'Nay SEi (Thatcher Avsnus! and turns west in its final approach to the Aokan.as River. ~h8 short... br~n~h of the ~rroyo origin~tes north of State Hi~h~ , way 76, starting ~s tWQ fa oks that join ~fteo flowing abo~t 1.5 ",il~~. Flowing northe~st"rly and roughly p~r~l:el to St~t~ high~ y"l.elJ. ,he lou~tio"~ of ull ~"ci.i~(l~ "ro ~huw" ",., th~ """v" ,pf~rAncad plates, "" ~sll as ths elev~tlon$ and extent of QVOr- flow of the St~nd~rd Pooj~ct Flood ~nd lntu~nodi~te Regional flood. wey 76, the two br",nchss join "t Mile 2.43., now~ in tha aUoyo ar.. th.. r~~ult of snowmelt ~nd rainfall ou~off durin~ UlO winteo and ~"riy spring. Duoinq ths summar mo~ths, ths flows res~lt fr~" th~ndBr"torme or g"ner~: rains over the "ntire watershed. The rolling high plains t"rr~in is fairly rough, bro~ ken, ~nd sp.,osaly \ieget~ted. The vegetation i~ typical of the "..mi~arld high pldins--pt"dominanUy sage brush, cactus. end native graos. Flood Doscoiptions Thno" are no known histori~al r~~ords of flood8 on Dry Creek. Di~cuosio" of large flood" Ln th" PU",'Llo reglon is crmt"ined in the "a<lier "neod descdptions" p..rbining to Wild HorsA~Dry Creek. " Th" study reach r,xt"mJs fr,," the mouth of ~~cdnight Arr~ya at th~ "rk~~q~q Riv~r to Mil~ ~.S7 whir-h-is juet so~th flnc upstream of ~here the short and long ~ranches join. ,loods in ~he study r"~ch normally originat~ frOtll ru~off of tha sntir" ",,~ t~rshsd due to tho limited areal "xt~nt ~f the drainage, Ths steec slcces and long n~no," shap" of thll drainags ~rQ condl>civB ~o f?~t rises ~nd ~igh pe~k flows af chort d~t?tion. Th~ ~y~oage "