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<br />on tMernap beeau"e the lO-foot contour interval and eoale of the <br />map do not permit precise plotting of the flooded area bounderi".. <br />PlatllU.hollla the highllluter profiles fortheSten- <br />c~rd Project and Int..r~edlot.. Resioner Floods. Acourete estimates <br />of ~~t..r surface etevation.. may be obtainerl frorn these plutes. <br />Plate 12 sholll~ two oross aeetiona that are typical <br />of the feur oactionc obtainad On Coadnight Arroyo in tMe reach <br />inve..~igated. The location.. of ~ll ....ctions ~re shown ~n the above <br />referenoed plates, ee well ae the ere~ations ~nd ..x tent of Ovar. <br />flow of the Standard Project ,lood and Inter~ediat.. Regional ,load. <br /> <br />FUTUilEFI.OOOS <br /> <br />F:ood D~"criptions <br />There ~re no known historicel rocord.. of floods on <br />Goodnight Arroyo. Discus~ion of larg~ floods in th~ Pueblo <br />region is contain..d in the "..rlier "flood dBscriptions" perta1n~ <br />ing to ~ild Hors~-Dry Croek. <br /> <br />I <br />I <br /> <br />This section of the report di~(;usses the St""dard <br />Project Floods "nd the Intermediate Ragio"al floocts onUl-,ld <br />Horse-Dry Cr"ak, Dry Creek, and CoorJ"ight Anayo in the vi;inity <br />of Pueblo, 8nd soma of the hazards of gre~t floods. Th~ St~nderd <br />Projeot nood represents thA r"~8on"ble IJpper limits ofAxpedAd <br />flooding. Flood~ of Inter~..di~te Regional Flood size ~~y be ex- <br />pectBd to OCC<Jr mare often, but th~y ~ill not be a~ severe ,,~ the <br />infrequent Standard Project Flood. <br />L~rg& floodg have occurred in the P~gt on th.. Ark~ns~s <br />Ri~Ar and its tributarles in the general geographic..l and physio_ <br />graphical rBgion of PIJeblo. Ha~vy stormB, ..imil~r to those causing <br />p~~t floods, undoubtedly will recur over th.. study ""tersheds to <br />Ceus~ futur~ floods of $imilar or gre~ter size at Pueblo. In ~ny <br />deter~in~tion of future floods ~hich ~~y oocur on a given stre~~, <br />it is d....ir~ble to consider ~ll aterm" and fLoods that he~a cccurr~d <br />in the region on "atersheds "ith ..i'-dh,r topcgr"phy, ~"tAr~hArl <br />cover, en~ physic~l chnrccteristic9. <br /> <br />Det..rmination cf !nter~ediate Hecion~l Flood <br />Ths Intermediate Regional flood i3 d~fined us hnving <br />"n aver"ge frequency of occurrence of ence in 100 year~ "t ~ des_ <br />ignated location, although it ~ay OCCur in any year and possibly <br />~ven in successive y&ara. This flood is c~lcul~t..d from ..tatia_ <br />tical ~n~lysss of ,~infDll and runoff ch~r3cterietic~ of stream" <br />in the gen~rel region of the w~tershada. rh~ lnter~ediute Regicn~l <br />flood represents ~ m~jor flood, aLthough it i8 less severe than <br /> <br />t~Q Stund~rd rroJ~ct flood. <br /> <br />'" <br /> <br />The Intf!ri1edi"ta Regionul f"loods on VJlld liorse_Dry <br />Creek, Dry Creek, snd ~ccanight Arroyo in the P~ablo vicinity <br />~ere deter~inf!d fro.' ~tetistic~l studies of regional annu~l pe~~ <br />flews. lndivic~~l contfib~tin'l df~inage ~f~~ st~tistic9 w"r~ <br />relahd to the variables of th.. runoff ~11~l'act~rht1c~ of lht! <br /> <br />th:occ w"tct""I~ u"de~ COr\drJ<:r~tic"', D,-,e ,0 tho; ~ack of re~crd"~ <br /> <br />" <br />