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Adult Snake River Steelhead DPS 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
BON-MCN 27.14 37.47 30.95 28.40 32.43 26.22 27.56 28.79 24.42 18.27 20.42 27.39 25.38 27.90 23.25 30.52 27.57
BON-IHR   42.26 34.53 36.89 36.20 35.80 33.49 34.27 31.29 25.06 35.15 34.67 32.25 34.22 27.93 34.72 34.82
BON-LGR 38.30 50.46 42.06 44.67 44.13 46.81 43.69 42.46 41.16 32.90 41.19 44.39 41.12 42.62 35.20 39.85 42.06
BON-TDA                       15.54 11.13 12.85 11.73 17.64 15.03
BON-JDA                                 24.38
BON-LMN                         34.71 37.25 27.83 36.25 38.40
BON-LGS                         35.93 39.52 33.10 37.58 39.43
TDA-MCN                       11.59 13.19 13.26 10.91 12.33 12.60
TDA-IHR                       19.02 20.46 19.62 15.80 16.88 19.71
TDA-LGR                       28.97 29.93 28.51 23.95 24.02 28.05
TDA-JDA                                 8.48
TDA-LMN                         23.11 22.57 16.55 18.70 23.36
TDA-LGS                         24.71 25.25 21.96 21.26 25.64
JDA-MCN                                 4.38
JDA-IHR                                 11.21
JDA-LMN                                 14.81
JDA-LGS                                 17.50
JDA-LGR                                 20.65
MCN-IHR   5.02 3.87 7.51 6.24 10.07 6.22 6.30 7.47 6.47 13.77 7.10 7.17 6.11 4.74 4.25 6.82
MCN-LGR 13.04 13.83 12.13 16.21 16.03 20.63 18.04 15.63 18.47 15.88 22.07 17.53 17.92 15.67 13.59 13.26 17.39
MCN-LMN                         10.47 9.36 7.04 7.23 10.80
MCN-LGS                         13.15 12.36 11.16 10.22 13.79
IHR-LGR   8.14 8.34 9.75 10.42 11.43 12.98 9.86 11.75 9.80 9.43 10.78 11.00 9.71 9.32 8.76 10.92
IHR-LMN                         3.16 2.98 2.92 2.56 3.67
IHR-LGS                         6.22 6.30 6.63 5.64 7.27
LMN-LGS                         3.04 3.16 3.25 3.05 3.80
LMN-LGR                         7.70 6.76 6.23 6.38 7.64
LGS-LGR                         4.66 3.32 2.93 3.20 3.99
Standard errors by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
BON-MCN 0.70 1.05 1.10 1.34 1.65 0.78 0.80 0.48 0.50 0.41 0.56 0.65 0.58 0.67 0.77 1.15 1.28
BON-IHR   1.06 1.11 1.48 1.69 0.97 0.92 0.53 0.58 0.50 0.80 0.74 0.65 0.73 0.90 1.20 1.43
BON-LGR 0.72 1.03 1.12 1.47 1.77 1.00 0.98 0.53 0.61 0.51 0.80 0.77 0.71 0.74 0.96 1.18 1.47
BON-TDA                       0.48 0.41 0.51 0.56 0.83 0.89
BON-JDA                                 1.25
BON-LMN                         0.66 0.73 0.85 1.14 1.50
BON-LGS                         0.63 0.73 0.95 1.16 1.44
TDA-MCN                       0.51 0.47 0.52 0.54 0.79 0.98
TDA-IHR                       0.67 0.58 0.61 0.69 0.91 1.17
TDA-LGR                       0.75 0.65 0.64 0.75 0.97 1.29
TDA-JDA                                 0.91
TDA-LMN                         0.59 0.62 0.62 0.86 1.27
TDA-LGS                         0.58 0.62 0.76 0.92 1.27
JDA-MCN                                 0.34
JDA-IHR                                 0.84
JDA-LMN                                 0.96
JDA-LGS                                 1.01
JDA-LGR                                 1.09
MCN-IHR   0.50 0.43 0.88 0.88 0.65 0.44 0.28 0.37 0.30 0.59 0.47 0.40 0.35 0.41 0.46 0.77
MCN-LGR 0.44 0.61 0.62 0.96 1.28 0.78 0.70 0.34 0.46 0.36 0.62 0.62 0.52 0.44 0.53 0.67 1.08
MCN-LMN                         0.44 0.38 0.40 0.51 0.92
MCN-LGS                         0.46 0.41 0.50 0.61 0.95
IHR-LGR   0.29 0.44 0.55 0.92 0.46 0.58 0.22 0.31 0.23 0.25 0.40 0.31 0.24 0.38 0.40 0.61
IHR-LMN                         0.14 0.11 0.23 0.22 0.33
IHR-LGS                         0.22 0.20 0.34 0.35 0.52
LMN-LGS                         0.18 0.14 0.28 0.29 0.43
LMN-LGR                         0.27 0.20 0.35 0.34 0.51
LGS-LGR                         0.23 0.12 0.22 0.21 0.29
Counts by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
BON-MCN 1210 664 577 391 259 925 1152 2601 2529 2210 1486 1248 1935 1608 974 473 473
BON-IHR 0 630 572 378 236 790 1065 2368 2355 2095 1375 1168 1837 1521 928 460 449
BON-LGR 1086 597 553 344 200 643 868 2097 2099 1827 1206 1041 1653 1404 845 399 381
BON-TDA 0 0 0 0 0 0 0 0 0 0 0 1465 2225 1845 1123 532 554
BON-JDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 503
BON-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1769 1480 849 445 430
BON-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1689 1441 875 426 393
TDA-MCN 0 0 0 0 0 0 0 0 0 0 0 1253 1949 1630 1007 482 490
TDA-IHR 0 0 0 0 0 0 0 0 0 0 0 1176 1848 1538 961 468 465
TDA-LGR 0 0 0 0 0 0 0 0 0 0 0 1047 1658 1423 865 404 392
TDA-JDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 525
TDA-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1782 1499 877 452 445
TDA-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1696 1456 893 430 407
JDA-MCN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 489
JDA-IHR 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 464
JDA-LMN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 446
JDA-LGS 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 407
JDA-LGR 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 393
MCN-IHR 0 673 621 398 248 799 1086 2399 2410 2191 1450 1205 1866 1575 998 503 462
MCN-LGR 1116 654 599 363 213 647 881 2122 2128 1907 1266 1070 1674 1446 897 433 390
MCN-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1801 1534 913 487 444
MCN-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1703 1484 929 460 405
IHR-LGR 0 640 599 364 216 645 886 2137 2156 1924 1303 1091 1690 1458 914 443 395
IHR-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1825 1550 930 496 450
IHR-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1710 1498 943 471 409
LMN-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1710 1524 906 478 417
LMN-LGR 0 0 0 0 0 0 0 0 0 0 0 0 1687 1480 888 451 404
LGS-LGR 0 0 0 0 0 0 0 0 0 0 0 0 1657 1511 948 460 410

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

Data Courtesy of Pacific States Marine Fisheries Commission

The Snake River Steelhead DPS includes naturally spawned anadromous O. mykiss (steelhead) originating below natural and manmade impassable barriers from the Snake River basin, and also steelhead from six artificial propagation programs: Tucannon River Program, Dworshak National Fish Hatchery Program, Lolo Creek Program, North Fork Clearwater Program, East Fork Salmon River Program, and Little Sheep Creek/Imnaha River Hatchery Program (Oregon Department of Fish and Wildlife Stock #29). Definition implemented by Columbia River DART: March 2010.