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. UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGIaSURVEY WATER RESOUR DIVISION UTAH DISTRICT /:,/;1. /.3 . . o o N W c_, ro-') STREAMFLOW AND RESERVOIR CONTENTS IN UPPER COLORADO RIVER BASIN (Provisional records for July 1968) Monthlv di char"e . Maximum dailv Minimum dailv Percent of Stream 2./ Median (Cfs) Mean (cfs) 30-year 1931-60 this month median Cfs-davs Acre-feet Cfs Date Cfs Date Colorado River near Cisco, Utah 6,778 4,832 71.3 149,790 297,100 9,690 1 2,820 23 Adiusted b/ 5 529 81.6 171 399 340 000 - - - - Green River at Green River, Utah 5,975 6,896 115 213,790 424,000 12,420 1 4,490 25&29 Adiusted c/ 5 389 90.2 167 054 331 300 - - - - San Juan River near Bluff, Utah 1,754 1,259 71.8 39,024 77 ,400 3,720 28 542 24 Adjusted d/ 1,817 104 56,317 111,700 - - - - a/ Median of mean discharges for June for 30-year period 1931-60. h/ Adjusted for change in storage in Blue Mesa Reservoir. Storage began Oct. 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. mi. (acre-feet) (acre-feet) (acre-feet) Blue Mesa Reservoir nr Saoinero. Colorado 3 426 940 SO{) 733 342 + 42 860 Flaming Gorge Reservoir at Flaming Gor"e Dam Utah 15 100 aoorox. 3 789 000 2 260 000 - 92 700 Navajo Reservoir nr Archuleta New Mexico 3 230 aoorox. 1 709 000 969 300 + 34 300 Lake Powell Reservoir at Glen Canvon Dam Arizona 107 700 aoorox. 27 000 000 9 566 000 - 65 000 Totals 33 438 800 13 528 642 - 80 540 Ted Arnow District Chief (WRD) Salt Lake City, Utah