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<br />UNITED STATES ICIAL FILE CC}?'(
<br />. Bur. of Reel.
<br />DEPARTMEI",IT OF THE INTERIO Region 7
<br />MAY 2 6 1967
<br />
<br />BUREAU OF RECLAMATION
<br />
<br />OFFICE OF CHIEF ENGINEER
<br />
<br />BUILDING 67, DEHVEP. FEO:::RAL CEHTER
<br />DENVER, COLORADO 80225
<br />
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<br />1M RUL'( D-'/"S5
<br />REFEil TO, /
<br />
<br />To:
<br />
<br />Wit 2 5 Y:;Fj7,
<br />
<br />Regional Director, Denyer, Colorado
<br />Attention; 7-730
<br />
<br />Fr(jm~
<br />
<br />Chief, DivisIon of Projec t Inves r~igat tons
<br />
<br />..... .-"
<br />
<br />&~bject: ReyLew of florJd frequency study for Halfmoon and Y~lta
<br />DiverBion damsiu,s--Fr.ringpan-ArkansE1.s Project, Col,orMO
<br />(your letter dated Wq 5, 1967)
<br />
<br />In a~coruanc~ vith request in reference letter, ve rhve re7ie.ed
<br />the Project 11anager's flood frequency study for Ilalfmoon and Y.alta
<br />diversion d.a.l1'.si tes and the review memorandum prepared by your
<br />Regional Hydrology Branch. Twenty-five, 50-, and lOO-year values
<br />ta.1cen from your reviev Jr,emorandwn and having the follo,.ing character-
<br />istics are approved for use in the prepar~tion of final designs and
<br />specifica tions.
<br />
<br />'\::>'
<br />
<br />Peak discharges (cis)
<br />"'.alta Diyersion Hal:t'D:oon Diversion
<br />Da'Il Y Dam
<br />
<br />Frequency
<br />(years )
<br />
<br />25
<br />50
<br />100
<br />
<br />1,490
<br />1,690
<br />1,900
<br />
<br />460
<br />510
<br />560
<br />
<br />Y Includes 190 cis transmountain diversion above
<br />the diversion da~ite
<br />
<br />Two copies of ou~ revlell memO!~,dUlll '.hich discusses the frequency
<br />study in more detail arc enclosed.
<br />
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<br />~rt '.''1;.r codp !1,~~;:r,,-r_ . .- ..'
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<br />/7 e ?X-7v-i;0~_/
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<br />
<br />Enclosure
<br />
<br />Copy t.o:
<br />
<br />Project Manager, Pueblo, eolor2.do
<br />(with enclosure)
<br />
<br /><
<br />
<br />OTHaZ STl1l>le (I)
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