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<br />UNITED STATES DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />WATER RESOURCES DIVISION
<br />Utah District
<br />
<br />STREAMFLOW AND RESERVOIR CONTENTS IN UPPER COLORADO RIVER BAS IN
<br />(Provisional records for July 1970
<br />
<br /> Monthlv discharge Maximum dailv Minimum dailv
<br /> Percent of
<br />Stream ~/ 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 CiSC06 Utah 6,778 8,907 131 276,120 547,700 15,700 1 5,940 26
<br />AdjustedE./ 8,915 132 276,380 548,200 - - - -
<br />Gre'en River at
<br />Green River, Utah 5,975 7,192 120 222,939 442,200 12,600 1 4,300 29-31
<br />AdjustedS.1 7 679 129 238 064 472,200 - - - -
<br />San Juan River
<br />near B1uffa/Utah 1,754 1,201 68 37,220 73,830 2,480 10 789 20
<br />Adjusted!! 1,461 83 45,289 89,830 - - - -
<br />
<br />a/ Median of mean discharges for the month for 30-year period 1931-60.
<br />b7 Adjusted for change in storage in Blue Mesa Reservoi~. 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 capac ity usable contents month
<br /> sa. mL (acre-feet) (acre-feet) (acre-feet)
<br />Blue Mess Reservoir near
<br />Sapinero, Colorado 3,426 829,500 823,1700 +500
<br />Flaming Gorge Reservoir at a/15,100
<br />Flaming Gorge Dam, Utah 3,749,000 1,866,000 +30,000
<br />Navajo Reservoir near
<br />Archuleta, New Mexico al 3,230 1,696,000 1,145,000 +16,000
<br />Lake Powell Reservoir at ~h07 , 700
<br />Glen Canyon Dam, Arizona 25,002,000 12,236,000 +171,000
<br />Totals 31,276,500 16,070,700 +217,500
<br />
<br />!il Approximate
<br />
<br />Ted Arnow, District Chief, WRD
<br />Salt Lake City, Utah
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