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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.

Harmonic 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 2019 2020 2021 2022
LGR-LGS 3.72 3.60 3.95 4.65 3.59 3.90 4.11 3.24 2.60 3.22 3.21 2.71 3.42 3.04 2.94 3.03 3.21 3.15 2.82 2.57 3.11
LGR-LMN 7.13 5.08 7.94 7.02 5.39 5.65 5.81 5.10 3.74 4.77 5.22 4.26 5.64 5.19 4.67 4.53 4.97 4.82 4.47 4.19 5.00
LGR-IHR   6.26 17.63 8.43 6.84 7.45 7.79 7.21 5.83 6.25 7.00 5.98 7.10 6.57 6.33 5.94 6.05 7.07 6.13 5.86 5.84
LGR-MCN 11.61 9.35 10.16 10.58 9.30 9.43 10.87 9.65 8.51 9.56 9.35 8.72 9.63 9.55 8.09 8.40 9.25 9.24 7.76 7.31 8.51
LGR-JDA 13.90 11.83 12.81 13.75 12.18 12.75 13.01 13.34 11.56 11.11 11.57 11.18 12.85 12.71 11.01 10.67 11.41 10.79 9.21 10.05 10.93
LGR-BON 15.51 14.31 15.32 15.51 13.68 13.85 14.96 13.99 13.32 14.69 14.24 11.43 13.55 13.51 11.50 11.58 11.50 12.40 10.67 10.88 12.14
LGS-LMN 2.66 1.55 2.59 2.06 1.82 1.89 1.85 1.68 1.40 1.81 1.75 1.66 1.83 2.09 1.61 1.54 1.58 1.62 1.58 2.13 1.66
LGS-IHR   3.45 7.29 3.57 3.31 3.50 3.61 3.45 3.01 3.40 3.42 3.13 3.43 3.69 3.24 3.03 2.68 3.46 3.18 4.08 2.66
LGS-MCN 6.86 5.52 5.93 5.51 5.71 5.63 6.51 6.09 5.45 6.07 5.64 5.58 6.01 6.17 5.02 5.49 5.57 5.84 5.02 5.47 4.98
LGS-JDA 9.45 8.07 9.05 8.98 8.79 8.77 8.78 9.64 8.61 8.50 8.22 8.17 9.32 9.57 7.94 8.20 7.97 8.10 6.53 8.79 7.56
LGS-BON 10.73 10.19 11.00 10.36 10.54 10.25 10.30 10.75 10.49 11.43 10.50 9.01 10.14 10.12 8.76 9.01 8.27 9.81 7.86 9.36 8.85
LMN-IHR   5.05 1.57 1.37 1.52 1.56 1.55 1.59 1.29 1.54 1.65 1.45 1.61 2.13 1.59 1.37 1.29 1.54 1.76 2.17 1.36
LMN-MCN 3.44 3.40 3.93 3.37 3.83 3.26 4.22 4.31 3.39 4.14 3.93 3.65 4.08 4.40 3.50 3.89 3.84 3.96 3.69 3.98 3.43
LMN-JDA 6.40 5.86 7.25 6.81 7.05 6.58 6.57 7.88 6.12 6.32 6.57 6.28 7.32 7.93 6.36 6.45 6.41 6.21 5.03 8.64 5.80
LMN-BON 7.63 7.83 8.25 8.28 8.72 7.96 7.95 9.06 7.92 9.44 8.81 7.08 8.06 8.97 7.28 7.37 6.96 7.77 6.51 7.05 7.46
IHR-MCN   2.45 1.28 1.86 2.24 1.70 2.42 2.55 1.99 2.29 2.14 1.86 2.17 2.21 1.99 2.42 2.02 2.76 2.05 2.02 1.85
IHR-JDA   9.00 4.29 5.06 5.49 4.92 4.96 6.23 5.27 4.74 5.15 4.49 5.41 5.15 4.92 4.96 4.16 5.68 3.77 5.19 4.00
IHR-BON   8.46 9.82 6.84 7.36 6.39 6.47 7.40 7.11 7.39 6.87 5.46 6.22 6.26 5.69 5.78 5.01 7.33 5.32 5.98 5.71
MCN-JDA 3.33 3.65 3.88 3.34 3.41 3.36 2.97 3.73 3.68 3.37 3.11 2.95 3.40 3.66 2.90 2.92 2.85 2.97 2.33 3.21 2.79
MCN-BON 4.95 5.70 5.51 5.00 5.08 4.75 4.45 4.93 5.13 5.34 4.59 3.96 4.39 4.75 3.95 3.92 3.73 4.44 3.86 4.14 4.42
JDA-BON 2.02 2.06 1.98 2.00 1.80 1.79 1.56 1.79 1.93 1.85 1.85 1.54 1.72 1.72 1.64 1.49 1.36 1.61 1.50 1.66 1.66
Standard errors by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
LGR-LGS 0.03 0.02 0.01 0.01 0.02 0.03 0.03 0.02 0.02 0.01 0.01 0.02 0.01 0.04 0.01 0.01 0.02 0.03 0.02 0.04 0.03
LGR-LMN 0.05 0.05 0.05 0.02 0.03 0.05 0.05 0.03 0.06 0.02 0.02 0.03 0.03 0.10 0.02 0.02 0.03 0.04 0.04 0.08 0.04
LGR-IHR   0.41 2.78 0.08 0.06 0.10 0.07 0.06 0.09 0.04 0.05 0.08 0.06 0.21 0.03 0.05 0.08 0.11 0.06 0.08 0.11
LGR-MCN 0.08 0.04 0.04 0.03 0.05 0.04 0.07 0.03 0.05 0.04 0.05 0.06 0.03 0.08 0.02 0.05 0.07 0.12 0.06 0.03 0.13
LGR-JDA 0.12 0.07 0.05 0.06 0.09 0.05 0.09 0.10 0.14 0.05 0.04 0.09 0.05 0.26 0.03 0.04 0.08 0.13 0.05 0.08 0.10
LGR-BON 0.12 0.08 0.09 0.09 0.11 0.09 0.13 0.09 0.09 0.15 0.09 0.10 0.08 0.13 0.04 0.08 0.11 0.13 0.05 0.03 0.06
LGS-LMN 0.02 0.01 0.02 0.01 0.01 0.02 0.01 0.01 0.02 0.01 0.01 0.01 0.01 0.04 0.01 0.01 0.01 0.01 0.04 0.26 0.03
LGS-IHR   0.12 2.54 0.03 0.02 0.05 0.03 0.02 0.04 0.02 0.02 0.04 0.03 0.10 0.02 0.02 0.03 0.05 0.08 0.39 0.14
LGS-MCN 0.03 0.02 0.02 0.01 0.02 0.02 0.03 0.02 0.02 0.02 0.02 0.03 0.02 0.05 0.01 0.03 0.04 0.07 0.09 0.18 0.14
LGS-JDA 0.05 0.04 0.04 0.03 0.04 0.05 0.05 0.06 0.09 0.04 0.02 0.05 0.03 0.18 0.02 0.03 0.05 0.09 0.08 0.77 0.17
LGS-BON 0.09 0.05 0.05 0.04 0.05 0.07 0.08 0.06 0.06 0.10 0.05 0.07 0.06 0.08 0.03 0.06 0.07 0.09 0.09 0.27 0.13
LMN-IHR   NA 0.53 0.02 0.01 0.02 0.01 0.02 0.03 0.01 0.01 0.02 0.02 0.10 0.01 0.01 0.02 0.02 0.07 0.48 0.08
LMN-MCN 0.01 0.02 0.02 0.01 0.02 0.02 0.03 0.02 0.03 0.02 0.02 0.03 0.02 0.05 0.01 0.03 0.04 0.05 0.10 0.43 0.11
LMN-JDA 0.03 0.04 0.07 0.04 0.03 0.03 0.04 0.07 0.09 0.03 0.02 0.06 0.04 0.20 0.02 0.03 0.05 0.06 0.09 2.03 0.13
LMN-BON 0.03 0.05 0.07 0.04 0.05 0.05 0.07 0.08 0.09 0.10 0.05 0.07 0.07 0.10 0.03 0.06 0.08 0.07 0.10 0.18 0.10
IHR-MCN   0.31 NA 0.02 0.02 0.02 0.02 0.02 0.01 0.02 0.02 0.02 0.02 0.05 0.02 0.04 0.05 0.07 0.07 0.07 0.14
IHR-JDA   2.35 NA 0.09 0.04 0.04 0.04 0.08 0.09 0.03 0.03 0.05 0.06 0.15 0.04 0.05 0.08 0.12 0.07 0.39 0.12
IHR-BON   3.04 4.01 0.09 0.06 0.07 0.06 0.08 0.06 0.11 0.06 0.07 0.09 0.08 0.06 0.09 0.10 0.13 0.08 0.12 0.19
MCN-JDA 0.01 0.02 0.03 0.02 0.02 0.01 0.02 0.02 0.03 0.02 0.01 0.02 0.02 0.04 0.01 0.02 0.03 0.04 0.03 0.08 0.10
MCN-BON 0.02 0.02 0.04 0.02 0.03 0.02 0.03 0.02 0.02 0.04 0.02 0.02 0.02 0.02 0.01 0.04 0.04 0.04 0.04 0.02 0.11
JDA-BON 0.01 0.01 0.01 0.02 0.01 0.01 0.01 0.01 0.01 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.02
Counts by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
LGR-LGS 3332 5142 25817 22418 5544 2366 5879 8783 2268 9791 11808 4273 11157 1140 13076 6035 5671 2532 2029 484 2318
LGR-LMN 4343 1970 6506 9542 4000 1369 3405 4353 555 8978 7617 2014 5920 277 7100 4503 3656 2362 1000 233 2158
LGR-IHR 0 5 7 813 1634 487 1930 2165 599 3500 2622 556 1557 85 1871 951 537 637 688 427 327
LGR-MCN 2962 5000 7556 8976 2667 4209 3100 8530 2711 5654 4902 2580 6090 1125 7522 1805 1346 759 1193 2074 448
LGR-JDA 1418 2794 3303 2517 1652 4135 2116 1942 590 5029 7364 1441 4511 191 4291 3851 1943 805 1787 548 737
LGR-BON 1348 2438 1909 1946 1093 1299 1147 2417 1447 907 1917 990 1973 622 3030 1038 849 988 2347 3962 1909
LGS-LMN 8111 3450 8899 13232 9952 1584 5410 6370 1004 11011 11548 2605 7890 316 7599 5941 4569 2556 155 8 387
LGS-IHR 0 2 7 1136 4505 485 2708 2842 968 4182 4153 801 1860 96 1793 1252 615 721 77 13 48
LGS-MCN 4806 5560 10225 11768 6224 4468 4125 9603 3999 7704 7664 3711 7072 1195 8326 2627 1823 853 172 42 98
LGS-JDA 2752 3451 4101 3428 4065 4440 3159 2631 936 6242 10693 2080 5951 200 5020 5374 2488 855 262 10 134
LGS-BON 2320 2693 2557 2545 2482 1380 1476 2686 2052 1234 3073 1266 2172 713 2813 1236 1084 991 257 50 221
LMN-IHR 0 1 5 608 3980 549 2433 1858 424 5379 3135 595 1457 32 1358 1110 410 671 56 4 68
LMN-MCN 8807 2755 3924 5988 5292 2829 3119 5516 1011 7257 5491 1970 4457 489 5944 2222 1342 888 110 15 113
LMN-JDA 4115 2057 1133 1929 3593 2872 2649 1751 379 7658 7870 1206 3612 89 3699 4626 1854 960 139 5 150
LMN-BON 4332 1423 995 1374 2130 885 1220 1653 501 1124 2312 693 1388 296 2268 1052 773 1110 179 29 295
IHR-MCN 0 13 1 653 2996 1221 2219 3340 1682 3609 2884 1187 1739 197 1727 707 229 319 147 80 30
IHR-JDA 0 6 1 182 2221 1182 1800 939 436 4008 3080 618 1073 59 1078 1397 304 332 196 16 57
IHR-BON 0 3 2 133 1147 341 862 986 883 516 1042 403 506 197 621 348 166 362 259 103 75
MCN-JDA 4438 5722 1988 1817 2850 10644 2378 3050 1801 5223 5419 2714 4350 562 4051 2691 1240 534 421 81 70
MCN-BON 3900 5194 1255 1447 1885 3578 1404 4703 5633 1365 2277 2009 2182 1761 3259 694 601 689 494 639 143
JDA-BON 2252 3275 567 485 1348 3954 909 1146 1161 960 2529 1082 1614 531 1928 1685 825 884 832 219 265

Last Update: Fri Jan 27 18:59:01 2023

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.