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on the mep because the lO-foot contour interval ond scele of the m?p do not permit precise plottin3 of ths flooded area bo~ndarie3. Plats 11 sho~s the high ~at8r profiles for the Stan- dard Projact and Intermediate Regional Flood~. ~ccurata estimates of water surface elevations may be obtained fr~ theee plotes. Plote 12 sho~s two crose soctions that ere typical of the f~~r sections obtained on Goodnight Arroyo in the reach investigated. The locations of all sectiona ere shown on the above referenced plates, as well a9 the elevations and extent of Over- flow of the Standard Project Flood and Intermediate Regional flood. FUTUREfLOOOS , I I Thi3 section of the report discusses the St~ndard Project floods ~nd the Intermedista Regional floods on Wild Horse_Dry Creek, D~y C~eBk, ~nd Goodnight Arroyo in the vioinity of Pueblo, and some of the hOLards of great flOOds. The Standard Project flood represents the reasonable upper limits of expected flooding. floods of Intermudi~te Regional flood size m~y be ex_ pe~ted to ocour mora often, but they will not be ee 5eve~e dS the infrequent Standard Project flood. Lerge floods have ocourred in the past on the Ark~nsas River end its tributuries in the general geographic~l and physio_ graphic~l ragion of Pueblo. He~vy stOrMS, eimilar to thosa causing past floods, u"d"ubt~uly will reour Over the study ..ateuheds to Oauss futura floods of similar or greatsr size st Pueblo. In any determination of future floods Nhioh may OCcur on a given streem, it is desirable to oonsidar all storms and floods that have occurred in the region on wstarahvde with slmil~~ topography, watershed oover, and physiosl oharacterietics. Flood Deecr1Dtions There are no kno~n historicel records of flood. on Goodnight A.~oyQ. Di6cuesion of large floods in t~c P"oblo region ie contained in the earlier "flood descriptions" pe~t"in- ing to Wild Horse_Dry C~eek. " CetArminationoftnts"nedieteReqionAlrlood The intermediate Regional flood is defined as having an ~veragc frequency of oocurrence of onoe In 100 ye~rs ~t a dce- ignated Ioc~tl"n, ullhuuyh it may occu. in "ny y..ar dno posslOly even in succesaive years. This flood is c91culeted fr~n statis_ tical ..nelye~a of Leinfall ?nd runoff oha~acteri6tice of stra~ma in th.. gen~ral region of the ~at..rsheds. The In~ermodiate Region~l rlood .eprasente .. mdjor flood, although it is 110"" .ever.. th~n th~ Ste~derd projact flood. The InterITIadiete Regional flood.. on ~ild ho.sBwDry Creek. Dry :reek. and Goodnight Arroyo in the Pueblo vicinity ~er.. deter"'ined fl:o,~ .tatisUcOll studies of reglon.al ~n~lJal peak flo,"s. Individual contrlbdtin'il d~dl1~y" "l.~" statistic" were rel~t..d to th~ v"rieb:es of th.. runoff characteristics of th~ thret'l wateullys un~er L'onslderation. OLea to thu lack of r~"or,fad "