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<br />7-2090 (4-.81)
<br />Bureau of Reclamation
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<br />Al REPORT STANDARD TITLE PAGE
<br />3. RECIPIENT'S CATALOG NO.
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<br />I. REPORT NO.
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<br />4. TITLE AND SUBTITLE
<br />Comparison of Estimated Probable
<br />Maximum Flood Peaks
<br />with Historic Floods
<br />
<br />REPORT DATE
<br />January 1986
<br />PERFORMING ORGANIZATION CODE
<br />
<br />7. AUTHOR(S)
<br />Kenneth L Bullard
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<br />9. PERFORMING ORGANIZATION NAME AND ADDRESS
<br />Bureau of Reclamation
<br />Engineering and Research Center
<br />Denver, CO 80225
<br />
<br />GRA NT NO.
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<br />12. SPONSORING AGENCY NAME AND ADDRESS
<br />Same
<br />
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<br />16. ABSTRACT "", "",,,;,,-"::S:-J::;:'::-:'::~~~_'-_:.-_;"_"'''N.~ ~
<br />Guidelines for safety modifications to Federal dams require l.hilim~sthigh:h~z~r(td~;;;~cbe<:
<br />able to safely pass a PMF (probable maximum flood)l'ln'thli; siiJdy~evll'rai'ofthelargest>"
<br />"observed" rainfall events in the conwrminous Uni~E!~,,~ta1es;atE!;,f~r,ijP<~!~,<l~~it,fi,l~E!,'pMf'!\,i~
<br />peak floods estimated for the same sites uSing Bureau;,()f,R,esl~!llaW)I1~~1~?d<,Jlo9y,:,:r,bll,;i0,~:
<br />study concludes that some PMF peaks are signifLcaQttY~<:.Lo~Il,_t~U,~_eJ:lj~!9JlcJloo<l"ll..,!,el1t.(":~!0'
<br />(Nine of the rain floods analyzed represent at least 80 percent,otlhe estimat~dPMF peaks,).'~
<br />and, therefore, the methods used to calculate"tne;'1' ,,..~ ffecti(;,€"an'(j''''iel(J''reasonable~
<br />peaks, , , < ',. " "<,;!f:li!,
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<br />17. KEY 'NORDS A'lO DOCUMENT ANALYSIS
<br />a, DESCR'PTORS-- "peak discharge/ "peak flows/ probable maximum precipitation/ run:,'"
<br />off! design flood/ "floods! rainfall-runoff relationship/ spillway design flood/dams/:
<br />probable maximum flood! "peak floods ' ,".',?"". "'':i;'";':,->:",,,,,,-,,::
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<br />COWRR, 0808
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<br />19. SECURITY CLASS 21. NO. OF PAGE
<br />(THIS R(PORT)
<br />UNCLASSIFIED 165
<br />20. SECURITY CLASS 22. PRICE
<br />{THIS PAGE)
<br />UNCLASSIFIEO
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