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Table 1. Summary of discharge variables for the Green River at Tusher Wash Diversion Dam. <br />The monthly average discharge values (cubic feet per second) of the Green River <br />during the water years of 1988 through 1997 were calculated from data collected at <br />the U.S. Geological Survey gage station located near Green River, Utah, while the <br />amounts of water diverted are based on estimated values. The percentage of time <br />when discharge is lower than 4800 cfs (the minimum discharge that radio-tagged fish <br />were documented to move upstream past the dam) is shown for each month. The <br />amount of water diverted at Tusher Wash Diversion Dam for irrigation and the <br />amount diverted for all uses (irrigation, pumping, and power generation) are shown as <br />percentages of the average monthly flow. <br />Month Average <br />Monthly <br />Flow (cfs) Average <br />Percentage of Time <br />When Q < 4800 cfs Irrigation <br />Diversion (Percent <br />of Average <br />Monthly Flow) Total Diversion <br />(Percent of <br />Average <br />Monthly Flow) <br />January 2,688 100.0 0 14.9 <br />February 2,918 94.7 0 13.7 <br />March 4,125 71.9 0 9.7 <br />April* 5,136 62.0 2.2 13.9 <br />May* 10,726 17.1 1.1 6.7 <br />June** 12,051 17.3 1.0 5.9 <br />July** 4,686 74.5 2.5 15.3 <br />August** 2,367 97.4 4.9 30.2 <br />September 2,442 96.0 4.7 29.3 <br />October 2,452 100.0 4.7 29.2 <br />November 2,854 100.0 0 14.0 <br />December 2,520 96.8 0 15.9 <br />*months when larval razorback sucker are drifting <br />**months when larval Colorado pikeminnow are drifting <br />14 <br />