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<br />STREAMFLOW <br />Streamflow for the Colorado River, Green River and San Juan River stalions for December 1998 <br />are shown in Table 2. Data presented in the following table was obtained from the monthly report <br />of streamflow and reservoir contents in the Upper Colorado River Basin, as provided by the D,S. <br />Geological Survey Water Resources Division, Utah District. A comparison of monthly <br />streamflow to average monthly streamflow during an 84 year period from 1914 to 1997 is <br />presented for each in figure 2 on page 4. <br /> <br />DECEMBER <br />DISCHARGE <br />(1000 a.f.) <br /> <br />Streamflow for the Colorado River. Green River and San Juan River, December 1998 <br />CUMULATIVE % OF 84 YEAR <br />% OF 83 YEAR MONTHLY (1914-1997) <br />(1914-1996) (DEe 98) CUMULATIVE <br />DECEMBER DISCHARGE DISCHARGE <br />DISCHARGE (1000 A.F.) (DEC 98) <br /> <br />Table 2. <br /> <br />Colorado River <br /> <br />near Cisco, Ut <br /> <br />Adjusted (a) <br /> <br />Green River <br /> <br />at Green River, Ut <br /> <br />Adjusted (b) <br /> <br />San Juan River <br /> <br />near Bluff, Ut <br /> <br />Adjusted (c) <br /> <br />Total <br /> <br />AdjUSled Total <br /> <br />Colorado River <br /> <br />at Lees Ferry (d) 921.0 <br /> <br />(a) Adjusted for cha.nge in storage in Blue Mesa Reservoir. Storage began in Blue Mesa Reservoir on October 27.1965. <br />(b) Adjusted for change in storage in Flaming Gorge and Fontenelle Reservoirs. Storage began in Flaming Gorge Reservoir <br />on November I. 1962. and in Fontenelle Reservoir in October of 1964. <br />Adjusted for change in Navajo Reservoir. Storage began on June 27. 1962. Not adjusted for San Juan-Chama <br />diversions. <br />Including the Paris River discharge. <br /> <br />231.5 <br />214,1 <br /> <br />69% <br /> <br />81J.; <br />765,6 <br /> <br />88% <br /> <br />263,0 <br />149.4 <br /> <br />103% <br /> <br />856.2 <br />593.7 <br /> <br />118% <br /> <br />71.5 <br />81.8 <br />445.3 <br /> <br />120% <br /> <br />293.3 <br />327.4 <br /> <br />138% <br /> <br />(c) <br /> <br />(~) <br /> <br />FORECAST <br />December inilows ranged from 93%-127% v[ dv.:rag.:. T;,e Aprij duloUgJi July [oreast raiig~s <br />from 67%-85% according to the January 15th mid-month forcast. <br /> <br />Table 3, Flow comparisons oflbe Upper Colorado Basin Reservoirs <br /> F orcast Outlook <br /> December Flow Percen10f Jan-Mar 1999 Percent of Apr-Jul 1999 Percent of <br /> (1000 a,f) Average (1000 a, f) Average (1000 an Average <br />F ontenelle 34 103,00% 110 104.00% 725 85.00% <br />FlanJing Gorge 37 93.00% 185 98.00% 1000 8400% <br />Blue Mesa 23 89,00% 71 88.00% 500 12.00% <br />Navajo 32 127.00% 103 83 00% 580 7500% <br />Lake Powell 439 10300% 1355 96.00% 5200 67,00% <br />