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. UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY WATER RESOURCES DIVISION UTAH DISTRICT ,r.H~ - . o <::> r..> w r.~.... r ) STREAMFLOW AND RESERVOIR CONTENTS IN UPPER COLORADO RIVER BASIN (Provisional records for December 1968) Month1v discharae Maximum dail" Minimum daily Percent of Stream !/ Median (Cfs) ~ean (Cfs) 30-year 1931-60 this month median Cfs-davs Acre-feet Cfs Date Cfs Date Colorado River near Cisco, Utah 2,768 3,925 142 121,670 241,300 4,380 3 3,300 23 Ad1usted .!1./ 2,752 99.4 85,305 169,200 - - - - Green River at I Green River, Utah 1,829 3,434 188 106,4401211.100 4,150 12,14 1,860 23 Ad1usted c/ 1 736 94.8 53.795 I 106,700 - - - - San Juan River 21,467 ! near Bluff, Utah 632 692 109 42,580 866 13 130 24 Adiusted d/ 434 68.7 13,451 i 26,680 - - - - !/ Median of mean discharges for June for 3D-year period 1931-60. .!1./ Adjusted for change in storage in Blue Mesa Reservoir. Storage began October 27, 1965. ~/ Adjusted for change in storage in Flaming Gorge Reservoir. Storage began November 1, 1962. ~/ Adjusted for change in storage in Navajo Reservoir. Storage began June 27, 1962. Drainage area Total End-of-month Change during Reservoir above dam capacity contents month sn. mL 'A__A_ (acre-feet' (acre-feet) Blue Mesa Reservoir nr Sanlnero Colorado 3,426 940,800 623,100 -72,100 Flaming Gorge Reservoir at 15,100a/ F1amin" Gorae Dam Utah 3 789 000 1 952 600 -104 400 Navajo Reservoir nr 3 230!/ Archuleta New Mexico 1 709.000 986 200 -15 900 lake Powell Reservoir at Glen Canyon Dam Arizona 107.70~/ 27 000 000 9 083 000 -167 000 Totals 33 438 800 : 12 644 900 -359.400 !/ Approximate Ted Arnow, District Chief (WRD) Salt Lake City, Utah