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<br />adjusting for these reservoir changes and an increase in reservoir bank
<br />storage of 767,000 acre-feet, the flow at Lee Ferry would have been
<br />14,130,000 acre-feet, compared to 11,362,000 acre-feet in 1977-78.
<br />Table 2 shows the last ten years' flow at Lee Ferry adjusted for storage
<br />changes.
<br />
<br />TABLE 2
<br />
<br />FLOW AT LEE FERRY ADJUSTED FOR
<br />RESERVOIR STORAGE CHANGES
<br />1969-70 to 1978-79
<br />
<br />Water Year
<br />
<br />Acre-feet
<br />
<br />1969-70
<br />1970-71
<br />1971-72
<br />1972-73
<br />1973-74
<br />1974-75
<br />1975-76
<br />1976-77
<br />1977-78
<br />1978-79
<br />
<br />Total
<br />
<br />12,)70,000
<br />11,703,000
<br />8,677,000
<br />15,946,000
<br />9,487,000
<br />13,292,000
<br />7,642,000
<br />2,037,000
<br />11,)62,000
<br />14,130,000
<br />
<br />106,646,000
<br />
<br />10,665,000
<br />
<br />10-year average
<br />
<br />The Water and Power Resources Service (formerly Bureau of Reclama-
<br />tion) estimates that if there had been no man-made depletions upstream,
<br />the virgin flow of the Colorado River at Lee Ferry would have been about
<br />17,793,000 acre-feet, compared to 15,268,000 acre-feet in 1977-78. Table
<br />3 shows the last ten years' virgin flow at Lee Ferry.
<br />
<br />TABLE 3
<br />VIRGIN FLOII AT LEE FERRY
<br />1969-70 to 1978-79
<br />
<br />Water Year
<br />
<br />Acre-feet
<br />
<br />1969-70
<br />1970-71
<br />1971-72
<br />1972-73
<br />1973-74
<br />1974-75
<br />1975-76
<br />1976-77
<br />1977-78
<br />1978-79
<br />
<br />15,405,000
<br />15,133,000
<br />12,194,000
<br />19,)95,000
<br />13,325,000
<br />16,921,000
<br />11,338,000
<br />5,470,000
<br />15,268,000
<br />17,793,000
<br />
<br />142,242,000
<br />
<br />14,224,000
<br />
<br />Total
<br />10-year average
<br />
<br />-2-
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