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Table 1. Sample dates, main channel and backwater temperature ranges, and flow ranges for the lower Green River (Reach 3) and the upper Green River (Reach 4), 1987-96. Year Class Sample Periods (Date) Temperature Range Ce) Flow Range (cfs) Main Channel Backwater Reach 3 - Lower Green River (RK 0-193) 1987 Fall 1987 (Sept. 23-25) 18-21 18-27 2550-2650 Spring 1988 (March 21-25) 6-10 6-15 3400-4600 1988 Fall 1988 (Sept. 26-30) 17-18 9-24 1950-2050 Spring 1989 (March 20-24) 6-7 7-17 4100-4450 1989 Fall 1989 (Sept. 25-29) 17-20 15-23 1550-1700 Spring 1990 (March 20-25) 1 0-14 8-20 2500-2650 1990 Fall 1990 (Sept. 17-20) 19-24 17-29 1200-1600 Spring 1991 (March 20-23) 5-9 5-13 2200-2400 1991 Fall 1991 (Sept. 16-19) 17-21 16-30 2650-2700 Spring 1992 (March I 8-2 ] ) 9-11 7-] 8 3000-3450 1992 Fall 1992 (Sept. 21-24) 20-24 17-32 1700-] 850 Spring 1993 (Mar 29-Apr 1) 9-11 9-20 4500-7400 1993 Fall] 993 (Sept. 21-24) 17-23 13-26 2050-2200 Spring 1994 (March 21-24) 9-13 7-17 3300-3500 1994 Fall] 994 (Sept. 20-23) 16-24 17-28 3100-3200 Spring 1995 (March 20-23) ] 2-14 9-22 2700-3100 1995 Fall] 995 (Sept 19-22) 19-25 17-3] 1700-1800 Spring 1996 (March ) 4-) 7) 8-12 8-]4 4500-5] 00 Reach 4 - Upper Green River (RK 346-5] 5) 1989 Fall] 989 (Sept 23-24) ]4-20 16-24 1250-1550 Spring] 990 (April 2-4) 10-]5 ] 0-22 2350-2750 1990 Fall 1990 (Sept 24-26) 15-22 15-25 1 ]00-1650 Spring ]99] (April 1-3) 8-16 9-18 1650-1700 1991 Fall ]991 (Sept 23-26) 13-2] 12-27 1750-1800 Spring 1992 (April 1-3) 8-]4 8-2] 2450-2600 1992 Fall] 992 (Oct 5-7) I 1-22 9-25 1150-1200 Spring 1993 (April 5-7) 7-9 7-16 3250-3600 1993 Fall 1993 (Sept 27-29) 12-18 8-20 1550-1700 Spring 1994 (Mar 30-Apr 1) 5-1 ] 4-17 2100-2300 7