Fork length distribution of juvenile chinook sampled below Bonneville Dam, 2007
                                   
Bonneville Dam
        Number of chinook in millimeters  Mean length % chinook tailwater discharge water
Week Date Total Range 30-39 40-49 50-59 60-69 70-79 80-89 90-100  > 100  chf < 150 < 60mm 60-100mm  (ft.) (kcfs) temp. (oF)*
6 1-Feb 0 - 0 0 0 0 0 0 0 0 - - - 14.5 188.4 34.3  
7 5-Feb 7 43-50 0 6 1 0 0 0 0 0 46.4 100% 0% 13.7 146.1 35.1  
7 8-Feb 4 35-45 1 3 0 0 0 0 0 0 40.8 100% 0% 13.9 147.7 35.2  
8 12-Feb 2 37-49 1 1 0 0 0 0 0 0 43.0 100% 0% 13.6 147.3 35.8  
8 15-Feb 10 39-118 2 3 1 0 0 0 1 3 70.3 86% 14% 13.5 139.8 36.0  
9 20-Feb 0 - 0 0 0 0 0 0 0 0 - - - 17.1 181.5 37.6  
9 23-Feb 9 38-67 3 3 1 2 0 0 0 0 41.1 78% 22% 13.5 130.0 37.8  
10 26-Feb 3 37-72 1 0 1 0 1 0 0 0 56.0 67% 33% 13.4 137.7 37.8  
10 1-Mar 0 - 0 0 0 0 0 0 0 0 - - - 16.1 176.6 37.9  
11 5-Mar 12 52-173 0 0 1 0 0 0 0 11 117.3 100% 0% 13.6 136.6 38.8  
11 8-Mar 34 49-72 0 2 17 13 2 0 0 0 59.7 56% 44% 15.1 159.8 39.4  
12 12-Mar 374 39-77 1 10 93 223 47 0 0 0 62.8 28% 72% 14.4 139.2 40.1  
12 15-Mar 27 39-130 1 1 3 7 1 0 4 10 84.3 29% 71% 19.7 226.4 40.6  
13 19-Mar 40 39-73 1 2 11 20 6 0 0 0 61.5 35% 65% 18.4 209.6 41.7  
13 22-Mar 8 37-73 1 2 2 2 1 0 0 0 24.5 63% 38% 20.5 232.2 42.3  
14 26-Mar 5 37-68 1 2 1 1 0 0 0 0 49.2 80% 20% 22.3 291.1 43.7  
14 29-Mar 18 37-69 1 10 1 6 0 0 0 0 49.6 67% 33% 20.0 230.5 43.5  
15 2-Apr 34 41-85 0 10 12 4 6 2 0 0 58.7 65% 35% 20.3 244.5 43.0  
15 5-Apr 6 47-75 0 1 0 2 3 0 0 0 66.3 17% 83% 21.4 270.8 43.5  
16 9-Apr 13 40-183 0 8 1 3 0 0 0 1 59.8 75% 25% 18.2 226.3 45.0  
16 12-Apr 46 39-86 3 17 7 9 6 4 0 0 56.3 59% 41% 17.2 198.4 47.8  
17 16-Apr 54 40-112 0 5 8 26 7 7 0 1 65.6 25% 75% 16.7 173.6 48.9  
17 19-Apr 80 37-75 9 53 6 7 5 0 0 0 47.1 85% 15% 18.3 203.8 49.5  
18 23-Apr 64 38-85 5 37 8 7 5 2 0 0 50.4 78% 22% 19.9 247.2 50.2  
18 26-Apr 78 39-96 1 34 7 15 6 13 2 0 58.6 54% 46% 19.6 249.4 51.1  
19 30-Apr 80 37-138 16 58 3 1 1 0 0 1 44.5 97% 3% 19.7 251.0 52.5  
19 3-May 285 37-152 28 122 10 29 26 51 17 2 59.2 57% 43% 21.8 278.1 51.6  
20 7-May 342 36-122 29 234 28 12 7 20 11 1 49.4 85% 15% 21.3 257.1 52.5  
20 10-May 486 34-156 54 369 46 5 8 2 0 1 45.2 97% 3% 23.0 304.1 52.9  
21 14-May 506 34-138 95 315 36 23 23 8 5 1 46.6 88% 12% 23.7 321.8 54.1  
21 17-May 594 37-127 71 449 53 13 2 1 3 1 44.7 97% 3% 21.4 266.7 56.7  
22 21-May 669 36-105 46 396 169 37 11 6 2 2 48.7 92% 8% 20.8 270.3 na  
22 24-May 532 36-115 36 357 94 19 9 5 6 6 48.5 93% 7% 20.4 253.0 58.6  
23 29-May 524 37-112 18 293 160 28 10 5 5 5 50.5 91% 9% 18.8 22.1 57.0  
                                     
4,946 425 2803 781 514 193 126 56 46 55.1 82% 18%
* Temperature readings from USGS gauge, as of 4/12, taken from mouth of Hamilton Cr. sensor # 2.