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<br />I
<br />r
<br />!
<br />I
<br />
<br />.......... ,\
<br />~.&..1....'
<br />
<br />reservoirs coupled wirh the generally low runoff
<br />has resulted in a total flow at Lee Ferry of only
<br />3 1,464,000 acre-feet as shown below: . .
<br />
<br />Flow at Lee Ferry
<br />(Acre-Feet)
<br />
<br />2,520,000
<br />
<br />nn_._mm.nnmnmn'n'mmn_ 2,427,000
<br />
<br />10,835,000
<br />
<br />nnmnnnnnnmmn nnnmnnnnmn" 7,873,000
<br />
<br />7 ,809,000
<br />
<br />JVateT Year
<br />]962-63
<br />1963-64
<br />1964-65
<br />1965-66
<br />1966-67
<br />
<br />Total 'm.m nmmmnn
<br />5-Year Averagennn.
<br />
<br />3] ,46+,000
<br />6,293,000
<br />
<br />I
<br />)
<br />
<br />In the next five yeats it will be necessary to
<br />release 43,536,000 acre-feet at Lee Ferry or an
<br />average of 8,707,000 acre-feet a year i;l order
<br />that deliverv will total 75,000,000 acre-feet for
<br />the IO-year' period 1963-1972.
<br />
<br />The required 5-year aye rage is 154,000 acre-
<br />feet greater than the required 6-year average
<br />computed in the Board's annual report for 196.5-
<br />66, indicating :Idditional "slippage" in 1967,
<br />
<br />In the Spring of 1967 the Board expressed
<br />concern relative to future operation of Lake
<br />Powell in view of the eonrinued subnormal run-
<br />off in the Colorado River Basin and requested
<br />the Bureau of Reclamation's plan of operation
<br />for satisfaction of the III (d) requirement of the
<br />Cumpact in the six remaining years of the 196 3-
<br />72 period.
<br />
<br />The Bureau in a letter dated June 9, 1967,
<br />informed the Board that the phnned power re-
<br />leases at Glen Canyon Dam during the years
<br />\967 through 1972 will provide a total flow at
<br />Lee Ferry for the years 1963 through 1972 equal
<br />to or greater than 75,000,000 acre-feet, with
<br />quantities at Lee Ferry in the remaining six years
<br />approximately as follows:
<br />
<br />]967mnnm
<br />1968nn nnnnnn_nn
<br />1969nnnnnn,.nnnmn
<br />1970,n..n , ...m,nmnnnnn
<br />197Ln nm
<br />]971..,mnn
<br />
<br />I
<br />I
<br />I
<br />
<br />7.9 million
<br />8.3 million
<br />8.8 million
<br />8.8 million
<br />8,8 million
<br />8.8 million
<br />
<br />acre-feet
<br />acre-feet
<br />acre-feet
<br />acre-feet
<br />acre-feet
<br />acre-feet
<br />
<br />51.4 million acre-feet
<br />
<br />I
<br />
<br />\Vater releases and losses during water year
<br />1966-67 were somewhat less than inflow with
<br />the result that the surface storage in the Colo-
<br />rado Riyer Basin increased moderately during the
<br />1966-67 year as shown in Table 4.
<br />
<br />Table <I
<br />
<br />CAPACITY AND SURFACE STORAGE OF MAJOR
<br />COLORADO RIVER BASIN RESERV.oIRS
<br />
<br />(Thousands of Acre-feet)
<br />
<br /> A,tjt'~
<br /> Storag~ Chang~
<br /> Gros} UJablt End of During
<br />UPP'T Basin. Capacity Capacity S,pl, 1961 Yt'ar
<br />Lake PowelL___~___. 27,WJ 25,002 6,360 ...63
<br />Flaming Gorge__~____ 3,789 3,749 2,713 +259
<br />Navajo___.__. __~_... 1,709 1,534 451 +117
<br />Blue Mesa______...__ 941 830 430 +238
<br />Fcntene:1le. __ __ _ _ ____ 345 345 17 ...7
<br /> --
<br />SubtotaL.. _____ 33,784 31,460 9,971 +544
<br />Iowa Basin
<br />Lake Mead_ _ _ ______. '28,537 ~26,159 1>,375 +265
<br />Lake l'...fohave_____.u 1,818 1,810 1,402 +15
<br />Lake Havasu___Uh__ 648 619 560 ...5
<br />SubtotaL__. ____ 31,003 2S,5R8 16,337 +275
<br />Toul Both Basins____ 64,787 60,048 26,308 +819
<br />
<br />. Baled upon 196-1 ledimentation survey.
<br />
<br />PLATE 5
<br />
<br />COLORADO RIVER BASIN RESERVOIRS
<br />STORAGE AND CAPACITY
<br />
<br />'0
<br />
<br />
<br />.,1
<br />
<br />LAKE MEAO
<br />LAKE POWELL
<br />FLAMIHGGOIlGE
<br />NAVAJO
<br />BLUE MESA
<br />FOHTEHELLE
<br />
<br />LAKE NE.t> !.TORAGE OI'lI.T
<br />
<br />a
<br />
<br />~ACllV[ CAPACITY
<br />
<br />'0
<br />
<br />'0
<br />
<br />o
<br />1'30
<br />
<br />19"0
<br />
<br />19'0
<br />WATER YEAR
<br />
<br />1960
<br />
<br />1967
<br />
<br />.e_"",.." ......., h"" "....".. ~Q" .....
<br />
<br />Plate 5 shows the combined active surface
<br />storage of Lake Mead and the Colorado River
<br />Storage Project reservoirs for the period 1935-
<br />1967. Lake Mohave and Lake Havasu are not in-
<br />
<br />29
<br />
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