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<br />UNITED STATES DEPARTMENT OF THE INTERIOR
<br />GEOLOG ICAL SURVEY
<br />Water Resources Division
<br />Utah District
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<br />STREAMFL~ AND RESERVOIR CONTENTS IN UPPER COLORADO RIVER BASIN
<br />December 1971
<br />
<br /> Monthly <1ischarge Maximum dai1v Minimum dailv
<br /> Percent of
<br />Stream ,!/Median (Cfs) Mean (Cfs) 3D-year
<br /> 1931-60 this month median Cfs-davs Acre-feet Cfs Date Cfs Date
<br />Colorado River
<br />near Cisco, Utah 2,768 4,262 154 132,120 262,100 5,070 22 3,120 21
<br />Adjuste~/ 3,272 118 101,437 201,200 - - - -
<br />Green River at
<br />Green River, Ut 1,829 3,658 200 113,390 224,900 4,530 1 2,600 14
<br />Adjusted!:/ 1,917 105 59,440 117,900 - - - -
<br />San Juan River
<br />near Bluff, Ut 632 1,858 294 57,608 114, 300 3,850 27 796 14
<br />Adjuste~/ 1,392 220 43,156 85,600 - - - -
<br />
<br />,!/ Median of mean discharges for the month for 3D-year period 1931-60.
<br />k/ Adjusted for change in storage in Blue Mesa Reservoir. Storage began October 27, 1965.
<br />~/ 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.
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<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 3,426 829,500 431,100 -60,900
<br />Flaming Gorge Reservoir at ,!/15,100 3,749,000 2,705,000 -107,000
<br />Flaming Gorge Dam, Utah
<br />Navajo Reservoir near a/ 3,230 1,696,000 991,300 - 28,700
<br />Archuleta, New Mexico
<br />Lake Powell Reservoir at
<br />Glen Canyon Dam, Ariaons ,!/107,700 25,002,000 13,117,000 -299,000
<br />Totals 31,276,500 17,244,400 -495,600
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<br />a/ Approximate
<br />
<br />Leon J. Jensen, Engineer
<br />Salt Lake City, Utah
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