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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
BON-MCN 27.14 37.41 30.95 28.40 32.43 26.19 27.56 28.79 24.42 18.28 20.43 27.37 25.49 27.89 23.32 26.13
BON-IHR   42.19 34.53 36.89 36.57 35.78 33.49 34.27 31.29 25.06 35.16 34.65 32.23 34.24 27.93 29.47
BON-LGR 38.30 50.36 42.06 44.67 44.41 46.80 43.69 42.46 41.14 32.90 41.21 44.52 41.12 42.65 35.28 37.66
BON-TDA                       15.54 11.11 12.85 11.68 16.63
BON-LMN                         34.70 37.27 27.87 32.52
BON-LGS                         35.97 39.59 33.33 34.78
TDA-MCN                       11.49 13.28 13.24 10.91 9.60
TDA-IHR                       18.96 20.46 19.60 15.81 13.19
TDA-LMN                         23.11 22.55 16.56 15.97
TDA-LGS                         24.77 25.23 21.98 18.70
TDA-LGR                       29.04 29.92 28.49 23.95 21.64
MCN-IHR   5.01 3.87 7.51 6.24 10.08 6.22 6.30 7.47 6.47 13.75 7.15 7.08 6.11 4.75 3.24
MCN-LGR 13.04 13.83 12.13 16.21 16.17 20.65 18.04 15.63 18.47 15.88 22.04 17.73 17.83 15.70 13.61 11.60
MCN-LMN                         10.39 9.37 7.06 6.25
MCN-LGS                         13.13 12.36 11.23 9.03
IHR-LGR   8.14 8.34 9.75 10.49 11.44 12.98 9.86 11.75 9.80 9.43 10.95 11.01 9.73 9.35 7.86
IHR-LMN                         3.17 2.98 2.92 2.40
IHR-LGS                         6.30 6.30 6.65 5.27
LMN-LGS                         3.13 3.17 3.26 2.79
LMN-LGR                         7.73 6.79 6.29 5.69
LGS-LGR                         4.58 3.38 2.97 2.37
Standard errors by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
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 0.78 0.94
BON-IHR   1.06 1.11 1.48 1.68 0.97 0.92 0.53 0.58 0.50 0.80 0.74 0.66 0.73 0.91 0.97
BON-LGR 0.72 1.03 1.12 1.47 1.75 1.00 0.98 0.53 0.61 0.51 0.80 0.75 0.72 0.74 0.96 1.09
BON-TDA                       0.49 0.41 0.51 0.56 0.78
BON-LMN                         0.67 0.73 0.85 1.01
BON-LGS                         0.63 0.73 0.95 1.06
TDA-MCN                       0.51 0.47 0.52 0.54 0.56
TDA-IHR                       0.67 0.58 0.61 0.70 0.67
TDA-LMN                         0.60 0.62 0.63 0.76
TDA-LGS                         0.57 0.62 0.76 0.85
TDA-LGR                       0.73 0.65 0.64 0.75 0.91
MCN-IHR   0.50 0.43 0.88 0.88 0.66 0.44 0.28 0.37 0.30 0.59 0.48 0.40 0.35 0.41 0.39
MCN-LGR 0.44 0.61 0.62 0.96 1.28 0.78 0.70 0.34 0.46 0.36 0.62 0.60 0.52 0.44 0.53 0.62
MCN-LMN                         0.43 0.38 0.41 0.46
MCN-LGS                         0.44 0.41 0.51 0.57
IHR-LGR   0.29 0.44 0.55 0.92 0.46 0.58 0.22 0.31 0.23 0.25 0.37 0.31 0.24 0.38 0.42
IHR-LMN                         0.14 0.11 0.23 0.26
IHR-LGS                         0.20 0.20 0.34 0.40
LMN-LGS                         0.16 0.14 0.29 0.34
LMN-LGR                         0.27 0.20 0.35 0.39
LGS-LGR                         0.21 0.12 0.22 0.20
Counts by reach and year
Reach 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
BON-MCN 1210 664 577 391 259 924 1152 2601 2529 2209 1483 1236 1922 1607 966 398
BON-IHR 0 630 572 378 234 789 1065 2368 2355 2095 1371 1158 1826 1519 923 369
BON-LGR 1086 597 553 344 199 642 868 2097 2100 1827 1202 1030 1641 1402 839 304
BON-TDA 0 0 0 0 0 0 0 0 0 0 0 1452 2214 1844 1119 498
BON-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1758 1478 843 353
BON-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1678 1438 866 329
TDA-MCN 0 0 0 0 0 0 0 0 0 0 0 1242 1938 1629 1003 404
TDA-IHR 0 0 0 0 0 0 0 0 0 0 0 1166 1837 1537 957 374
TDA-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1771 1498 873 357
TDA-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1685 1455 889 330
TDA-LGR 0 0 0 0 0 0 0 0 0 0 0 1036 1647 1422 861 307
MCN-IHR 0 673 621 398 248 798 1086 2399 2410 2191 1446 1193 1855 1574 994 410
MCN-LGR 1116 653 599 363 212 646 881 2122 2128 1907 1263 1059 1662 1444 893 338
MCN-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1789 1533 908 393
MCN-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1691 1483 922 361
IHR-LGR 0 639 599 364 215 644 886 2137 2156 1924 1300 1081 1679 1456 909 346
IHR-LMN 0 0 0 0 0 0 0 0 0 0 0 0 1814 1549 926 402
IHR-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1699 1498 938 371
LMN-LGS 0 0 0 0 0 0 0 0 0 0 0 0 1698 1520 900 377
LMN-LGR 0 0 0 0 0 0 0 0 0 0 0 0 1676 1477 880 352
LGS-LGR 0 0 0 0 0 0 0 0 0 0 0 0 1646 1501 938 363

Last Update: Fri Oct 20 18:59:02 2017

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.