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<br />. <br /> <br />UNITED STATES DEPARTMENT OF THE INTERIOR <br />GEOLOGICAL SURVEY <br />WATER RESOURCES DIVISION <br />Utah District <br /> <br />~ <br />,c:-"'-j.' <br />/(/?~ <br />~(l); ~~ <br /> <br />(..... <br />,...., <br />~ . <br /> <br />STREAMFLOW AND RESERVOIR CONTENTS IN UPPER COLORADO RIVER BASIN <br />(Provisional records for April 1970) <br /> <br /> Month1v discharl>e Maximum daily Minimum daily <br /> Percent of <br />Stream a/ Median (Cfs) Mean (Cfs) 30-year <br /> 1931-60 this month median C fs -days Acre-feet Cfs Date Cfs Date <br />Colorado River <br />near Cisco, Utah 7,081 4,787 68 143,600 284,800 6,130 13 4,120 6 <br />Adjusted!?.I 4,951 70 148,525 294,600 - - - - <br />Green River at <br />Green River, Utah 7,381 4,172 56 125,150 248,200 6,160 17 2,720 3 <br />AdjustedE./ 4,043 55 121,301 240,600 - - - - <br />S an Juan Ri ver <br />near B1uffJ Utah 3,254 828 25 24,842 49,270 1,320 1 677 26 <br />Adjuste~/ 1,120 34 33,612 66,670 - - - - <br /> <br />~/ Median of mean discharges for the month for 3D-year period 1931-60. <br />b/ Adjusted for change in storage in Blue Mesa Reservoir. Storage began October 27, 1965. <br />c/ Adjusted for change in storage in Flaming Gorge Reservoir. Storage began November 1, 1962. <br />~/ Adjusted for change in storage in Navajo Reservoir. Storage began June 27, 1962. <br /> <br /> Drainage area Usable End-of-month Change during <br /> Reservoir above dam capacity usable contents month <br /> sa. mi. {acre-feet' { acre-feet' (acre-feet) <br />Blue Mesa Reservoir near <br />S ao inera Colorado 3 426 829 500 420 600 + 9 800 <br />Flaming Gorge Reservoir at <br />F1aminl> Gorl>e Dam Utah a/ 15 100 3 749 000 1 476 400 - 7 600 <br />Navajo Reservoir near <br />Archuleta Ne", Mexico a/ 3 230 1 696 000 876 600 +17 400 <br />Lake Po",e11 Reservoir at <br />Glen Canyon Dam Arizona a/ 107 700 25 002 000 9 152 000 -383 000 <br />Totals 31 276 500 11 925 600 -363 400 <br /> <br />~/ Approximate <br /> <br />Ted Arnow, District Chief, WRD <br />Salt Lake City, Utah <br />