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<br />UNITED STATES DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />WATER RESOURCES DIVISION
<br />Utah District
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<br />STREAMFLOW AND RESERVOIR CONTENTS IN UPPER COLORADO RIVER BASIN
<br />(Provisional records for September 1970)
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<br /> Monthlv dischan,e Maximum dailv Minimum dailv
<br /> Percent of
<br />Stream 2./ Median (Cfs) Mean (Cfs ) 30-year
<br /> 1931-60 this month median Cfs -davs Acre-feet Cfs Date Cfs Date
<br />Colorado River
<br />near Cisco, Utah 2,508 6,789 271 203,670 404,000 14,800 7 3,460 1
<br />Adjusted1'/ 6,984 278 209,529 415,600 - - - -
<br />Green River at
<br />Green River, Utah 1,816 3,002 165 90,070 178,700 3,650 1 2,450 4
<br />Ad j us tedf.1 2,432 134 72,952 144,700 - - - -
<br />San Juan River
<br />near Bluff, Utah 990 5,062 511 151,862 30l,200 35,230 6 607 4
<br />Adjustedil 6,920 700 207,915 412,400 - - - -
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<br />a/ Medlan of mean dlscharges for the month for 30-year period 1931-60.
<br />bl 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 I, 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 /> SQ. mi. (acre-feet) (acre-feet) (acre-feet)
<br />Blue Mesa Reservoir near
<br />Sapinero, Colorado 3,426 829,500 810,400 +11,600
<br />Flaming Gorge Reservoir at ~I
<br />FlaminR Gor2e Dam Utah 15,100 3,749,000 1,791,000 -34,000
<br />Navajo Reservoir near 2./
<br />Archuleta New Mexico 3,230 1,696,000 1,261,100 +111,200
<br />Lake Powell Reservoir at
<br />Glen Canvon Dam Arizona ~I 107,700 25,002,000 12,039,000 +95,000
<br />Totals 3l,276,500 15,901,500 +183,800
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<br />2./ Approximate
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<br />Leon J. Jensen, Engineer
<br />Salt Lake City, Utah
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