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<br />.
<br />
<br />UNITED STATES DEPARTMENAF THE
<br />GEOLOGICAL~VEY
<br />Water Resources Division
<br />Utah District
<br />
<br />INTERIOR
<br />
<br />~
<br />
<br />l'>..l
<br />CO
<br />'-'
<br />
<br />STREAMFLOW AND RESERVOIR CONTENTS IN UPPER COLORADO RIVER BASIN
<br />
<br />August 1971
<br />
<br />,~
<br />
<br /> Monthly discharge Maximum dailv Minimum dai1v
<br /> Percent of
<br />Stream ,!/Median (Cfs) Mean (Cfs) 30-year
<br /> 1931-60 this month median Cfs-days Acre-feet Cfs Date Cfs Date
<br />Colorado River
<br />near Cisco, Utah 3,095 3,676 119 113,950 226,000 4,780 1 2,480 17
<br />Adjusted!?1 3,036 98 94,127 186,700 - - - -
<br />Green River at
<br />Green River, Ut 2,683 3,226 120 100,010 198,400 35,400 21 2,970 6
<br />Adjusted,Sl 2,560 95 79,355 157,400 - - - -
<br />San Juan River
<br />near Bluff, Ut 1,056 1,530 145 47,429 94,080 5,340 22 423 17
<br />Adjusted.!!.! 1,644 156 50,960 101,080 - - - -
<br />
<br />al Median of mean discharges for the month for 30-year period 1931-60.
<br />hi Adjusted for change in storage in Blue Mesa Reservoir. Storage began October 27, 1965.
<br />~I Adjusted for change in storage in Flaming Gorge Reservoir. Storage began November 1, 1962.
<br />~I 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 />Sapinero, Colorado 3,426 829,500 580,600 -39,300
<br />Flaming Gorge Reservoir at !!I 15,100 3,749,000 3,001,000 -41,000
<br />Flaming Gorge Dam, Utah
<br />Navajo Reservoir near ~I 3,230 1,696,000 997,900 + 7,000
<br />Archuleta, New Mexico
<br />Lake Powell Reservoir at
<br />Glen Canyon Darn, Arizona a/107,700 25,002,000 13,938,000 -380,000
<br />Totals 31,276,500 18,517,500 -453,300
<br />
<br />,!I Approximate
<br />
<br />Leon J. Jensen, Engineer
<br />Salt Lake City, Utah
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