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<br />Oth,., eve~t5 "' si".~tflt"~.~" "" R.",,~ C...,'k ,-"clude'
<br /> 'l"y U. 19AO di5"har~.. . 2,020 d<
<br /> '<< U. 1979 ~isch",~", . l,lg" d..
<br /> S"p U. Ig72 dts~h.,~~~ . 1,900 ds
<br /> A<1<: ". 1971 1isch"r~" . 1,000 ~fs
<br /> 'lay '". 1967 di~char..;~ . 1,nO ds
<br /> 'lilY 21, 1922 dischar,o:.. . 1,110 d"
<br />
<br />I:'IVESTlr;ATIf)~S ....'1D ANALYS!S
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<br />I~t~rpcetation and Use of Repo,t
<br />
<br />.~. Freq.....ncy And T)ls~h"r"e
<br />
<br />The 1Cl--, 50-, 100-, and 50fJ-ye'H flood <,vents ~,e ,,~e.d ~s the flood
<br />
<br />Stl(r1iHca"t flood "v~nts "" PAr,~chun' Creek inciu~e :
<br /> '"' U. 1979 dis("har~c . '" d~
<br /> Au..; U. 1977 dbchar>,e . 2,110 ("fs
<br /> Ju1 H. 1<176 dischal"~e' . 2,600 ds
<br /> '"' '. I<lS2 dls~hH~e . on cfs
<br /> '"' ". 1n2 dts~ha(~e . '" do
<br />
<br />fr'.ql.lencies for this flood plair. "'131ysis. Th>Js rhe data deve10jwd in
<br />
<br />~hLi report "iIt be co",patib1c ~.ot only for reg"la~lon purpogeg, a~.d >1.6.
<br />
<br />1041 des i"r.a~ ion bllL also for Federal 1ns<1rance Administrat 101' flood
<br />
<br />ins"t'a.n~e fate studies.
<br />
<br />S~reamflu" (ecurds are far fro," cu"ol..t~ on Parachute Cr.."tc. and R.oa~
<br />
<br />These "arious flood events M"" an "vera"e occunence of onCe fn the
<br />
<br />Cn'e~, then fore a nUTlIher of other flood eVents no dOubt h<lv,' occu<red
<br />
<br />"<1",bet' of ye>l.rs as l"dicnted. Por e>:a"'ple, th~ iOo-year flood oc~U(S, on
<br />
<br />orlrhoucf>efncrecorded.
<br />
<br />the aWl"ao;e, o~C.c In a 100 v~ar period, and has nOne pe.rcent chance of
<br />
<br />beino; equ8i~d or e~ceeded in any given year.
<br />
<br />The pal"tlcular "",,S for the vafious floodevcnts In addition to th.ose
<br />
<br />otated above "(,, tlS follo"s:
<br />
<br />lO-Y"ar a"d ~0-Year Flood Events
<br />
<br />I",fot'ma~ion <e..;ardin~ these e"",.r freq,,~~cy floods is espedaIly
<br />
<br />us<'fut for fllt.\1re eniolln""f!n" stlldi..s and land use olannlru; purpo"es
<br />
<br />related to ,dnOf road svst"m5, ",f"-or cllannc.l improve",,,n,", [f... location of
<br />
<br />p<lrka and rec,,,atio,,al fJdlities, :lo;ricLlltura1 lands, ano "ppl\r~..naM
<br />
<br />,
<br />
<br />irructllres. Th us~ of the t",,,er freq"~,,c~.y floods '<lay 0.' c(Jn~ld"r"" in
<br />
<br />pb."nlrt;>: flood prcv<'ntlon "roJect. to pfOt"a ~l"iculturat ;<reas, or <lth"r
<br />
<br />pr()Pf'rty whe',",' r1~k to 11f~ is "nt a factor.
<br />
<br />lOfJ-Yea~ l'lo<ld Eve"t
<br />
<br />The WO-~ear flood e"<'~r IlI.W I'>t> uS en i" If''\1 of ",,;,>r frt>q,...nd<-,s for
<br />
<br />,'~.>;ir.,..,(lLl~ d,'si~n ""rpos,'s w'wo,- H~.-,ur ~""urit:y fr()~. ,;tru<'tur" hilur,'
<br />
<br />h ""al~(>~_
<br />
<br />,.,
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