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<br />PAST FLOODS <br /> <br />TA8LE4 <br />BOULDER CREE~ II <br /> <br />TMis section presents .ho flood histories and storm <br />Characteristics of Boulder and Sou.M 30ulaer C,eeks. <br /> <br />StreJ", Gaging Shtion NeJr OrOdeil <br />(LocJfed I mile upstreJ..tromFourmile Creek and 3tnlles <br />sour-hwestot tr.ecourthouse in Boulder) <br /> <br />Flood Rccords <br />Large flOOdS haye been reportec In the Boulder Crook <br />EJ<lsinduringtheyeil:50i IS64, 1876, 1894, 1914, 1923, i938,and <br />1969. The largest Mistoric flood occurred in 1894. Computations, <br />~hicM w(lrO ",ade 18 years aftor the flood, indicated the peak disCharge <br />.'ll<JynayabeenasmucMa511,OOOcubicfeotpersecond(c,f,s,l. <br />Stream gaging stations show that high streamflows occurred at othor <br />times, The stn'ilm gage On Boulder Creek is located near Orodeil, 3 <br />miles southwostof the courthouse in Boulder. TheOrodoElllgagowas <br />tlrstest<lblished In 1887 and operated Intermittontlyuntll1916, <br />The records are continuous trom 1916 to the present tlmo. Asecond <br />gage located 2 1/2 miles dowllstream trom the Orooell gage was operated <br />intermittently trorn i888 until 1908. Theperiodsofoperatlonot <br />these two g"ge~ and the oyents whiCh produced peak. discharge, in <br />exCess 01 I,OOOc.t.s.along'''iththedateotoccurrcnceareprovided <br />in Tables 4 iOnd 5, The floo<ls of 18M, 1875, and 18<l4occurred <br />durIng periods when the gages were not in operation. TnoEl floods 01 <br />!923 and 1938 occurr:!d trom int lOw downstream of toe Orodei: gage On <br />BoulderCrcuk. <br />^ st,C3~ gaging station was locatod On South Boulder Creek <br />I mile wtlsl of Eldorado Spring~ in 1888. Tois gage has oeen ;n <br />continuous operatIon since 1904. Teble 6 presents the gaging recordS <br />On South Boulder Creek, The only major flOOd roportod On South Boulder <br />Crook occurred in 1938. Tablo 6 shows that the poakdiscMarge tor this <br />flood far exceeded t.hepeak.dlscharges forall other recorded Ilow 5. <br /> <br />Perioas 0' Operation <br />FrOl'l' '0 <br />'"9 18137 Cd 1887 <br />A~r 1868 0", 1288 <br />'" 1906 '0' 1914 <br />'....r 1916 "resent <br /> <br /> Peak:ilscharqes U <br />Dateot Occurrence c.t.s. <br />J ',g 1918 1,300 <br />, Jun 1921 2,500 <br />" "" 1935 1,060 <br />" J" 1941 1,120 <br />" J" 1947 1,290 <br />" "'0 1951 1,220 <br />, J" 1952 1,180 <br />29 J" 1957 1,01::: <br />" Jul 1965 1.190 <br />, "y 1969 1,150 " <br /> <br />'I <br /> <br />Records taken !,om United Stiltes Oepartment 01 intorior Geological <br />Suryey, "Water-SupplyPap..rs IJIO..nd i680" and tMe yearly "Water <br />SurtaceRccorJ5torColorado". <br /> <br />u <br /> <br />Only poak discnarge5 whicn exceoded 1,000 cubic teet p~r 5eco~d <br />Ic.f,s.l"reli5ted. <br /> <br />0, <br /> <br />Prel imi n<lry estirr"'~e, <br /> <br />" <br /> <br />" <br />