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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 rec~rds for February 1970)
<br />
<br /> Month1v dischar"e Maximum daily Minimum daily
<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 2,690 3,964 147 110,990 220,100 4,300 15 3,460 1
<br />Adjusted b( 2,233 83 62,516 124,000 - - - -
<br />Green River at
<br />Green River, Utah 2,074 3,125 151 87,490 173,500 4,000 16 2,360 6
<br />Adjusted c( 2,602 125 72,851 144,500 - - - -
<br />San Juan River
<br />near Bluff, Utah 867 2,340 270 65,530 130,000 2,490 15 2,260 23
<br />Adjusted d( 767 88 21,477 42,600 - - - -
<br />
<br />a( Median of mean discharges for the month for 30-year period 1931-60.
<br />b( 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.
<br />
<br /> Drainage area Usable End-of-month Change during
<br />Reservoir above dam capac ity usable contents month
<br /> Sa. mi. ( acre-feet) (acre-feet) (acre-feet)
<br />Blue Mesa Reservoir near
<br />Sapinero Colorado 3 426 829 500 493 600 -96 100
<br />Flaming Gorge Reservoir at
<br />Flaming Gorge Dam, Utah a( 15,100 3,749,000 1,487,000 -29,000
<br />Navajo Reservoir near a(
<br />Archuleta, New Mexico 3,230 1,696,000 924,900 -87,400
<br />Lake Powell Reservoir at
<br />Glen Canyon Dam, Arizona a( 107,700 25,002,000 9,439,000 +64,000
<br />Totals 31 276 500 12 344 500 -148 500
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<br />~( Approximate
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<br />Ted Arnow, District Chief, WRD
<br />Salt Lake City, Utah
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