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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 2018
LGR-LGS 4.91 4.59 5.27 5.84 4.14 4.64 5.23 4.24 3.09 4.18 4.44 3.37 4.12 3.87 3.36 3.38 3.77
LGR-LMN 9.02 6.23 10.48 8.12 5.95 6.24 7.10 6.12 4.37 5.90 6.64 4.95 6.61 5.86 5.14 4.96 5.49
LGR-IHR   6.39 19.82 9.24 7.40 8.06 8.96 8.18 6.65 7.42 8.50 6.75 7.98 7.38 6.72 6.40 6.64
LGR-MCN 13.24 10.27 11.64 11.62 9.79 10.13 12.12 10.73 9.24 10.83 11.09 10.11 10.49 10.34 8.50 9.06 10.10
LGR-JDA 15.49 13.10 13.68 14.74 12.65 13.41 14.17 14.71 12.50 12.82 13.02 12.48 13.84 13.85 11.36 11.42 12.19
LGR-BON 16.90 15.53 16.42 16.40 14.16 14.41 16.16 15.13 14.12 16.05 15.78 12.56 14.60 14.28 11.77 12.27 12.36
LGR-TDA                         16.11   14.47 22.80  
LGS-LMN 3.82 1.99 3.94 2.51 2.09 2.24 2.26 1.92 1.77 2.23 2.15 1.97 2.30 2.31 1.75 1.70 1.78
LGS-IHR   3.45 12.22 3.99 3.61 3.99 4.12 3.66 3.50 3.95 3.99   4.05 4.07 3.41 3.29 2.90
LGS-MCN 7.79 6.07 6.78 6.11 6.10 6.25 7.24 6.69 5.98 6.80 6.54 6.48 6.68 6.47 5.21 6.21 6.14
LGS-JDA 10.35 9.01 9.75 9.57 9.20 9.80 9.44 10.48 9.56 9.68 9.05 9.03 10.27 10.03 8.23 8.99 8.66
LGS-TDA                             10.09   15.27
LGS-BON 12.02 11.05 11.70 10.84 10.99 10.91 10.97 11.25 11.09 12.56 11.36 9.96 11.25 10.23 8.90 9.75 8.90
LMN-IHR   5.05 6.77 1.60 1.70 1.73 2.16 1.97 1.61 1.92 1.91   2.04 2.40 1.87 1.50 1.61
LMN-MCN 3.80 3.86 4.61 3.70 4.20 3.64 5.27 5.14 3.81 4.90 4.79 4.52 4.69 4.78 4.00 4.55 4.44
LMN-JDA 6.93 6.52 8.29 7.27 7.38 7.07 7.68 9.05 6.82 7.58 7.26 7.13 8.29 8.28 6.76 7.18 7.05
LMN-BON 8.11 8.48 9.13 8.61 9.14 8.35 9.11 9.98 8.51 10.68 9.64 7.94 9.06 9.32 7.75 8.16 7.65
LMN-TDA                             14.33    
IHR-MCN   5.14 1.28 2.08 2.64 2.06 3.22 3.24 2.27 2.93 2.95 2.48 2.78 2.50 2.62 3.42 2.59
IHR-JDA   13.71 4.29 5.46 5.86 5.32 5.76 7.29 6.04 5.69 5.88 5.12 6.32 5.49 5.41 5.91 4.74
IHR-BON   13.96 11.78 7.06 7.78 6.76 7.32 8.32 7.60 8.36 7.71 6.12 7.13 6.53 6.18 6.55 5.46
IHR-LGS                       -3.95          
IHR-LMN                       -1.89          
IHR-TDA                       4.48   11.95      
MCN-JDA 3.64 4.26 4.41 3.61 3.68 3.68 3.28 4.30 4.11 4.03 3.49 3.29 3.88 4.00 3.22 3.34 3.24
MCN-BON 5.23 6.27 5.91 5.24 5.39 5.01 4.70 5.28 5.40 5.87 4.95 4.28 4.90 4.95 4.07 4.43 4.09
MCN-TDA                       14.23 4.02 9.71 3.10    
TMJ-LGR                           -6.28      
JDA-BON 2.17 2.15 2.05 2.14 1.93 1.87 1.67 1.88 2.03 2.05 2.00 1.61 1.90 1.76 1.74 1.70 1.47
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 2018
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 0.02 0.03
LGR-LMN 0.08 0.09 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 0.03 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 0.08 0.14
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 0.09 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 0.09
LGR-BON 0.15 0.10 0.11 0.09 0.12 0.11 0.17 0.13 0.09 0.20 0.15 0.15 0.12 0.19 0.05 0.12 0.15
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 0.02
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 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 0.05 0.04 0.08 0.02 0.07 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 0.07 0.07
LGS-TDA                             NA   NA
LGS-BON 0.08 0.07 0.07 0.05 0.06 0.11 0.12 0.10 0.07 0.13 0.08 0.12 0.11 0.11 0.04 0.12 0.10
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 0.12
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 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 0.07
LMN-BON 0.04 0.08 0.11 0.05 0.06 0.09 0.11 0.12 0.11 0.12 0.09 0.17 0.12 0.13 0.06 0.15 0.13
LMN-TDA                             NA    
IHR-MCN   2.02 NA 0.04 0.03 0.05 0.06 0.04 0.03 0.03 0.05 0.06 0.05 0.10 0.06 0.12 0.14
IHR-JDA   3.79 NA 0.12 0.07 0.06 0.07 0.13 0.12 0.05 0.06 0.10 0.10 0.21 0.07 0.09 0.13
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 0.19 0.19
IHR-LGS                       0.07          
IHR-LMN                       0.06          
IHR-TDA                       NA   NA      
MCN-JDA 0.02 0.03 0.04 0.03 0.03 0.01 0.03 0.05 0.04 0.04 0.02 0.03 0.03 0.09 0.06 0.03 0.05
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 0.14 0.07
MCN-TDA                       10.96 0.45 NA NA    
TMJ-LGR                           NA      
JDA-BON 0.02 0.01 0.03 0.05 0.02 0.01 0.03 0.02 0.02 0.03 0.02 0.01 0.06 0.02 0.03 0.06 0.03
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 2018
LGR-LGS 3266 5070 25929 21395 4840 2303 5767 8727 2262 9488 11353 4183 10766 1078 12678 5168 5436
LGR-LMN 4226 1916 6192 8994 3400 1285 3158 3751 527 8521 6921 1968 5488 256 5862 3389 3394
LGR-IHR 0 5 7 744 1303 451 1775 1796 581 3286 2354 545 1467 84 1509 691 507
LGR-MCN 2973 4905 7379 8430 2272 3817 2824 7049 2655 5401 4394 2474 5626 1017 6032 1286 1225
LGR-JDA 1376 2699 3232 2336 1338 3702 1956 1536 571 4753 6545 1378 4151 175 3145 2693 1738
LGR-BON 1287 2366 1845 1811 970 1182 1030 2014 1420 856 1660 968 1795 588 2494 783 785
LGR-TDA 0 0 0 0 0 0 0 0 0 0 0 0 1 0 2 1 0
LGS-LMN 7837 3289 8497 12257 8795 1237 4641 4793 940 10375 10350 2527 7354 263 5128 4401 4203
LGS-IHR 0 2 7 1035 3775 352 2174 2017 914 3953 3672 0 1748 89 1247 913 590
LGS-MCN 4806 5361 9910 10788 5441 3036 3055 6538 3775 7195 6831 3539 6464 893 5773 1857 1672
LGS-JDA 2625 3260 3988 3103 3446 2889 2672 1820 875 5844 9407 1984 5443 173 3219 3736 2164
LGS-TDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1
LGS-BON 2178 2549 2467 2326 2221 908 1103 1860 1919 1139 2631 1242 2008 587 1891 873 997
LMN-IHR 0 1 5 548 3263 413 1932 1478 414 5097 2635 0 1409 31 1074 782 391
LMN-MCN 8910 2693 3779 5423 4475 2021 2584 4142 996 6818 4489 1916 4119 449 4614 1488 1224
LMN-JDA 4001 1923 1083 1726 2953 2018 2166 1308 366 7101 6626 1182 3330 85 2746 3157 1623
LMN-BON 4199 1327 961 1253 1859 628 975 1242 490 1047 1801 675 1283 283 1752 708 697
LMN-TDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
IHR-MCN 0 13 1 611 2629 1116 2007 2895 1667 3505 2711 1183 1694 194 1528 542 228
IHR-JDA 0 6 1 160 1920 1088 1645 795 426 3866 2864 610 1039 58 912 1065 297
IHR-BON 0 3 2 123 1033 315 782 867 874 501 955 399 487 194 563 272 161
IHR-LGS 0 0 0 0 0 0 0 0 0 0 0 797 0 0 0 0 0
IHR-LMN 0 0 0 0 0 0 0 0 0 0 0 594 0 0 0 0 0
IHR-TDA 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0
MCN-JDA 4553 5501 1941 1655 2481 9758 2166 2596 1785 5049 5035 2666 4127 550 3400 2030 1157
MCN-BON 3969 5034 1210 1338 1734 3308 1273 4160 5576 1307 2078 1992 2096 1720 2847 508 573
MCN-TDA 0 0 0 0 0 0 0 0 0 0 0 2 2 1 1 0 0
TMJ-LGR 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
JDA-BON 2125 3151 520 421 1200 3611 815 986 1121 901 2253 1061 1510 516 1616 1256 775
JDA-TDA 0 0 0 0 0 0 0 0 0 0 0 2 1 0 1 1 0

Last Update: Sat Feb 16 18:59:02 2019

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.