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Snake River Chinook Spring/Summer ESU Historical and Current Year Mean Travel Time Estimates

Click on a reach travel time in the table to view a plot of the reach-specific daily mean travel time as it varies throughout the season. The date of the daily mean travel time is determined by and plotted on the reach entry date, i.e., the date of the last detection for each PIT-tagged fish at the first project in the reach. The plots include a 95% confidence interval for each reach entry date on which more than one fish started traversing the reach.


Arithmetic mean travel times by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
LGR-LGS 4.91 4.61 5.29 5.86 4.15 4.64 5.23 4.26 3.10 4.19 4.44 3.38 4.12 3.88 3.36 3.28
LGR-LMN 9.02 6.26 10.52 8.14 5.96 6.23 7.10 6.14 4.38 5.91 6.64 4.96 6.62 5.86 5.15 4.84
LGR-IHR   6.39 19.82 9.26 7.42 8.06 8.96 8.20 6.70 7.44 8.50 6.76 7.98 7.38 6.72 6.30
LGR-MCN 13.24 10.29 11.65 11.63 9.80 10.12 12.12 10.74 9.27 10.84 11.09 10.13 10.50 10.35 8.52 9.31
LGR-JDA 15.49 13.13 13.68 14.75 12.70 13.41 14.16 14.76 12.55 12.85 13.02 12.50 13.85 13.87 11.37 11.65
LGR-BON 16.90 15.55 16.46 16.42 14.18 14.40 16.17 15.15 14.16 16.07 15.78 12.58 14.61 14.32 11.80 12.71
LGR-TDA                         16.11   14.47 22.80
LGS-LMN 3.82 1.99 3.95 2.51 2.10 2.24 2.26 1.93 1.78 2.23 2.15 1.97 2.30 2.31 1.75 1.69
LGS-IHR   3.45 12.22 4.00 3.62 4.00 4.12 3.67 3.51 3.95 3.99   4.05 4.07 3.41 3.29
LGS-MCN 7.79 6.08 6.79 6.11 6.11 6.26 7.24 6.70 5.99 6.81 6.54 6.49 6.68 6.48 5.22 6.39
LGS-JDA 10.35 9.01 9.74 9.58 9.22 9.81 9.44 10.50 9.58 9.71 9.05 9.04 10.28 10.07 8.24 9.23
LGS-BON 12.02 11.06 11.72 10.85 11.00 10.91 10.97 11.28 11.13 12.57 11.36 9.95 11.27 10.26 8.92 10.29
LGS-TDA                             10.09  
LMN-IHR   5.05 6.77 1.60 1.70 1.73 2.16 1.98 1.61 1.92 1.91   2.04 2.40 1.87 1.50
LMN-MCN 3.80 3.87 4.62 3.71 4.20 3.64 5.27 5.15 3.80 4.90 4.79 4.53 4.69 4.79 4.01 4.71
LMN-JDA 6.93 6.52 8.29 7.27 7.39 7.07 7.68 9.08 6.83 7.59 7.26 7.13 8.29 8.28 6.77 7.37
LMN-BON 8.11 8.50 9.15 8.61 9.14 8.35 9.12 10.01 8.52 10.68 9.64 7.96 9.07 9.33 7.77 8.56
LMN-TDA                             14.33  
IHR-MCN   5.14 1.28 2.08 2.64 2.06 3.23 3.24 2.27 2.93 2.95 2.49 2.78 2.51 2.62 3.59
IHR-JDA   13.71 4.29 5.46 5.89 5.31 5.77 7.30 6.05 5.71 5.88 5.12 6.33 5.49 5.42 6.10
IHR-BON   13.96 11.78 7.06 7.81 6.79 7.33 8.33 7.61 8.37 7.71 6.14 7.15 6.53 6.18 6.95
IHR-LGS                       -3.96        
IHR-LMN                       -1.89        
IHR-TDA                       4.48   11.95    
MCN-JDA 3.64 4.27 4.41 3.61 3.69 3.69 3.28 4.30 4.12 4.04 3.49 3.30 3.88 3.99 3.22 3.43
MCN-BON 5.23 6.28 5.92 5.24 5.41 5.02 4.70 5.28 5.40 5.87 4.95 4.28 4.90 4.95 4.07 4.63
MCN-TDA                       14.23 4.02 9.71 3.10  
TMJ-LGR                           -6.28    
JDA-BON 2.17 2.16 2.06 2.14 1.94 1.87 1.67 1.88 2.04 2.05 2.00 1.62 1.90 1.76 1.74 1.76
JDA-TDA                       12.77 1.74   8.37 0.70
Standard errors by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
LGR-LGS 0.06 0.05 0.02 0.02 0.03 0.05 0.04 0.03 0.04 0.03 0.04 0.04 0.02 0.08 0.01 0.03
LGR-LMN 0.08 0.10 0.08 0.04 0.04 0.07 0.07 0.06 0.11 0.04 0.05 0.07 0.05 0.18 0.03 0.04
LGR-IHR   0.50 2.48 0.12 0.08 0.15 0.09 0.09 0.12 0.07 0.10 0.14 0.09 0.33 0.05 0.09
LGR-MCN 0.10 0.05 0.06 0.04 0.07 0.06 0.09 0.06 0.06 0.06 0.09 0.10 0.05 0.13 0.03 0.11
LGR-JDA 0.15 0.09 0.07 0.09 0.11 0.07 0.11 0.15 0.15 0.08 0.07 0.14 0.07 0.43 0.05 0.08
LGR-BON 0.15 0.10 0.11 0.09 0.12 0.11 0.17 0.13 0.09 0.20 0.15 0.16 0.12 0.20 0.06 0.18
LGR-TDA                         NA   3.35 NA
LGS-LMN 0.03 0.03 0.04 0.01 0.01 0.06 0.02 0.02 0.06 0.02 0.02 0.03 0.03 0.07 0.01 0.01
LGS-IHR   0.12 3.22 0.06 0.02 0.13 0.05 0.04 0.07 0.04 0.04   0.07 0.18 0.03 0.04
LGS-MCN 0.05 0.03 0.03 0.02 0.03 0.05 0.06 0.04 0.06 0.04 0.04 0.06 0.04 0.08 0.02 0.07
LGS-JDA 0.07 0.06 0.05 0.05 0.04 0.07 0.07 0.10 0.12 0.06 0.04 0.08 0.06 0.26 0.03 0.08
LGS-BON 0.08 0.07 0.07 0.05 0.06 0.11 0.12 0.10 0.07 0.13 0.08 0.11 0.11 0.11 0.05 0.15
LGS-TDA                             NA  
LMN-IHR   NA 5.18 0.04 0.01 0.04 0.05 0.04 0.06 0.02 0.02   0.05 0.21 0.03 0.02
LMN-MCN 0.02 0.03 0.04 0.02 0.03 0.04 0.06 0.05 0.05 0.03 0.04 0.07 0.04 0.09 0.03 0.07
LMN-JDA 0.03 0.06 0.11 0.05 0.04 0.05 0.08 0.12 0.14 0.05 0.04 0.09 0.07 0.23 0.04 0.05
LMN-BON 0.04 0.08 0.11 0.05 0.06 0.09 0.11 0.12 0.12 0.12 0.09 0.17 0.12 0.13 0.06 0.18
LMN-TDA                             NA  
IHR-MCN   2.02 NA 0.04 0.03 0.05 0.06 0.04 0.03 0.03 0.05 0.07 0.05 0.10 0.06 0.13
IHR-JDA   3.79 NA 0.13 0.07 0.06 0.07 0.13 0.13 0.05 0.06 0.10 0.10 0.21 0.07 0.10
IHR-BON   7.71 4.81 0.12 0.07 0.17 0.14 0.13 0.08 0.16 0.12 0.16 0.16 0.12 0.11 0.22
IHR-LGS                       0.07        
IHR-LMN                       0.06        
IHR-TDA                       NA   NA    
MCN-JDA 0.02 0.03 0.05 0.03 0.03 0.01 0.03 0.05 0.04 0.04 0.02 0.03 0.03 0.09 0.06 0.04
MCN-BON 0.02 0.03 0.06 0.04 0.04 0.03 0.05 0.03 0.02 0.07 0.05 0.04 0.09 0.03 0.02 0.18
MCN-TDA                       10.96 0.45 NA NA  
TMJ-LGR                           NA    
JDA-BON 0.02 0.01 0.04 0.05 0.02 0.01 0.03 0.02 0.02 0.03 0.02 0.01 0.06 0.02 0.03 0.07
JDA-TDA                       10.04 NA   NA NA
Counts by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
LGR-LGS 3266 5009 25451 21166 4797 2290 5758 8662 2195 9441 11353 4092 10720 1073 12554 3770
LGR-LMN 4227 1888 6095 8915 3373 1281 3147 3723 515 8446 6921 1927 5457 256 5812 2505
LGR-IHR 0 5 7 737 1292 450 1768 1789 565 3259 2354 526 1462 84 1498 497
LGR-MCN 2973 4858 7301 8359 2248 3797 2817 7023 2586 5387 4394 2419 5596 1011 5935 945
LGR-JDA 1376 2665 3190 2327 1320 3683 1949 1523 559 4712 6545 1349 4134 173 3119 2017
LGR-BON 1287 2349 1816 1790 965 1179 1027 1999 1390 854 1660 935 1787 580 2449 486
LGR-TDA 0 0 0 0 0 0 0 0 0 0 0 0 1 0 2 1
LGS-LMN 7837 3248 8384 12139 8731 1232 4613 4722 920 10308 10350 2494 7322 259 5091 3810
LGS-IHR 0 2 7 1028 3748 350 2171 1998 899 3926 3672 0 1741 89 1234 789
LGS-MCN 4806 5319 9822 10705 5407 3030 3049 6482 3708 7185 6831 3498 6436 887 5706 1569
LGS-JDA 2625 3238 3949 3090 3415 2882 2664 1807 864 5799 9407 1966 5420 169 3198 3214
LGS-BON 2178 2530 2436 2307 2208 906 1099 1847 1884 1138 2631 1216 1998 579 1863 648
LGS-TDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
LMN-IHR 0 1 5 543 3246 413 1921 1463 408 5063 2635 0 1407 31 1068 689
LMN-MCN 8910 2669 3746 5374 4451 2015 2575 4119 979 6798 4489 1903 4105 445 4575 1295
LMN-JDA 4001 1908 1073 1718 2937 2016 2154 1296 361 7045 6625 1169 3312 85 2737 2793
LMN-BON 4199 1314 947 1241 1851 627 972 1228 481 1047 1801 664 1280 282 1729 552
LMN-TDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
IHR-MCN 0 13 1 605 2587 1099 1987 2883 1653 3496 2711 1170 1690 192 1523 476
IHR-JDA 0 6 1 158 1880 1072 1630 788 422 3844 2864 605 1037 58 909 908
IHR-BON 0 3 2 121 1021 308 778 863 864 500 955 394 484 193 558 218
IHR-LGS 0 0 0 0 0 0 0 0 0 0 0 784 0 0 0 0
IHR-LMN 0 0 0 0 0 0 0 0 0 0 0 590 0 0 0 0
IHR-TDA 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0
MCN-JDA 4552 5430 1913 1646 2442 9538 2147 2589 1765 5037 5035 2650 4113 548 3387 1718
MCN-BON 3969 4982 1200 1312 1709 3237 1262 4152 5536 1307 2078 1971 2087 1707 2810 403
MCN-TDA 0 0 0 0 0 0 0 0 0 0 0 2 2 1 1 0
TMJ-LGR 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
JDA-BON 2125 3104 510 419 1190 3530 805 978 1109 899 2253 1043 1506 510 1598 973
JDA-TDA 0 0 0 0 0 0 0 0 0 0 0 2 1 0 1 1

Last Update: Wed Oct 18 18:59:02 2017

Data Courtesy of Pacific States Marine Fisheries Commission

The Snake River Spring/Summer Chinook ESU includes naturally spawned spring/summer-run Chinook salmon originating from the mainstem Snake River and the Tucannon River, Grande Ronde River, Imnaha River, and Salmon River subbasins. It also includes spring/summer-run Chinook salmon from 11 artificial propagation programs: Tucannon River Program, Lostine River Program, Catherine Creek Program, Lookingglass Hatchery Program, Upper Grande Ronde Program, Imnaha River Program, Big Sheep Creek Program, McCall Hatchery Program, Johnson Creek Artificial Propagation Enhancement Program, Pahsimeroi Hatchery Program, and Sawtooth Hatchery Program. Definition implemented by Columbia River DART: March 2015.