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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
LGR-LGS 4.11 3.82 4.94 4.33 2.77 3.48 3.49 2.86 2.56 2.80 2.42 2.56 2.74 3.00 2.44 2.69
LGR-LMN 8.90 7.52 9.33 7.14 5.09 6.79 4.77 5.64 4.39 5.72 4.94 4.42 5.47 6.01 4.86 4.89
LGR-IHR   8.33 12.14 7.32 6.16 7.00 6.35 7.96 6.24 7.37 6.22 6.33 5.99 6.56 6.08 6.13
LGR-MCN 11.49 10.10 10.83 9.95 7.99 8.64 8.34 9.06 8.23 10.71 7.65 8.82 8.33 9.01 7.16 8.44
LGR-JDA 15.00 14.49 15.10 13.65 11.00 12.82 10.77 13.58 11.82 13.04 10.72 11.78 11.61 12.10 10.11 10.50
LGR-BON 17.08 16.94 16.83 15.08 12.07 14.11 13.11 13.62 13.07 15.51 10.81 11.73 11.48 14.00 10.71 10.36
LGR-TDA                               7.54
LGS-LMN 3.84 2.35 3.83 2.61 2.06 3.23 1.66 2.36 2.32 3.33 2.48 2.12 2.24 2.68 2.27 2.50
LGS-IHR   3.60 5.21 3.43 3.17 4.05 2.85 3.96 3.99 5.06 3.72 3.73 3.23 3.70 3.55 4.03
LGS-MCN 7.04 5.62 6.43 5.44 4.75 5.41 4.51 5.70 6.00 7.50 5.06 5.99 5.29 5.74 4.92 6.22
LGS-JDA 10.72 9.48 10.83 9.49 7.82 9.53 6.85 9.91 9.78 10.93 8.30 8.99 8.67 9.99 8.10 8.91
LGS-BON 12.42 11.73 12.77 11.18 8.90 11.35 8.37 10.05 11.16 12.50 8.31 9.58 8.72 10.36 8.70 8.69
LGS-TDA                           8.19    
LMN-IHR   1.08 2.33 1.30 1.51 1.39 1.39 2.25 1.79 1.97 2.02 1.60 1.47 2.47 1.79 1.92
LMN-MCN 3.34 3.04 3.29 3.13 3.08 2.86 2.92 3.99 3.77 4.17 3.32 3.25 3.16 4.08 3.36 4.02
LMN-JDA 7.14 6.65 7.44 7.00 6.22 6.79 5.48 8.29 6.84 7.33 6.40 5.83 6.35 7.36 6.15 6.34
LMN-BON 8.49 9.08 10.06 8.67 7.38 8.19 6.85 8.37 8.99 8.77 6.90 6.53 6.46 8.65 7.07 6.52
IHR-MCN   1.62 2.16 1.81 2.06 1.55 1.69 2.15 2.13 2.12 1.58 1.64 1.71 2.28 1.90 2.32
IHR-JDA   13.09   5.34 5.51 5.80 4.36 5.97 5.74 5.52 4.98 4.32 5.03 5.33 4.79 4.94
IHR-BON   6.95   7.69 6.40 7.11 5.50 6.38 7.15 6.99 5.17 5.04 5.30 6.64 5.80 5.58
MCN-JDA 4.53 3.95 4.92 4.01 3.88 4.36 3.20 4.51 4.57 5.32 3.97 3.51 3.81 3.45 3.29 3.53
MCN-BON 6.19 5.81 7.10 5.73 4.79 6.13 4.31 4.82 5.54 5.37 4.19 4.25 4.14 4.71 4.23 3.88
MCN-TMJ           29.01                    
MCN-TDA                           5.62    
JDA-BON 2.03 1.77 1.92 1.81 1.54 1.60 1.50 1.72 2.08 1.59 1.45 1.58 1.49 1.89 1.65 1.37
JDA-TDA                               0.43
TDA-BON                               25.03
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 0.07 0.04 0.03 0.04 0.11 0.03 0.02 0.02 0.03 0.02 0.02 0.03 0.07 0.02 0.05
LGR-LMN 0.13 0.15 0.07 0.05 0.07 0.33 0.07 0.04 0.11 0.06 0.04 0.07 0.08 0.26 0.05 0.09
LGR-IHR   2.00 1.67 0.12 0.13 0.21 0.08 0.09 0.10 0.12 0.09 0.10 0.11 0.29 0.12 0.16
LGR-MCN 0.16 0.17 0.15 0.09 0.14 0.14 0.08 0.06 0.08 0.13 0.10 0.09 0.11 0.13 0.07 0.25
LGR-JDA 0.23 0.32 0.24 0.13 0.15 0.34 0.11 0.09 0.16 0.12 0.07 0.14 0.11 0.37 0.09 0.14
LGR-BON 0.25 0.25 0.41 0.28 0.25 0.31 0.11 0.08 0.07 0.26 0.14 0.12 0.12 0.12 0.07 0.24
LGR-TDA                               NA
LGS-LMN 0.07 0.04 0.03 0.02 0.02 0.09 0.02 0.03 0.07 0.04 0.03 0.04 0.04 0.18 0.04 0.06
LGS-IHR   0.39 0.58 0.05 0.04 0.11 0.03 0.06 0.06 0.09 0.05 0.07 0.05 0.11 0.08 0.13
LGS-MCN 0.12 0.09 0.11 0.04 0.05 0.06 0.04 0.05 0.04 0.08 0.05 0.07 0.06 0.09 0.05 0.18
LGS-JDA 0.17 0.19 0.18 0.08 0.06 0.14 0.05 0.10 0.09 0.09 0.05 0.11 0.08 0.31 0.10 0.12
LGS-BON 0.16 0.13 0.32 0.20 0.08 0.19 0.07 0.08 0.04 0.19 0.08 0.08 0.09 0.10 0.07 0.20
LGS-TDA                           0.12    
LMN-IHR   NA 0.34 0.02 0.03 0.03 0.02 0.05 0.06 0.04 0.04 0.04 0.04 0.13 0.06 0.07
LMN-MCN 0.09 0.04 0.04 0.02 0.04 0.03 0.04 0.04 0.08 0.06 0.05 0.06 0.05 0.10 0.06 0.16
LMN-JDA 0.12 0.12 0.15 0.08 0.05 0.19 0.06 0.09 0.15 0.06 0.05 0.10 0.12 0.26 0.08 0.09
LMN-BON 0.08 0.10 0.32 0.18 0.08 0.21 0.10 0.07 0.10 0.16 0.10 0.07 0.09 0.12 0.07 0.15
IHR-MCN   0.24 NA 0.04 0.05 0.05 0.04 0.04 0.04 0.06 0.04 0.05 0.05 0.07 0.09 0.19
IHR-JDA   7.97   0.12 0.07 0.34 0.06 0.09 0.11 0.08 0.08 0.09 0.14 0.22 0.13 0.12
IHR-BON   0.92   0.42 0.10 0.32 0.07 0.07 0.05 0.26 0.10 0.09 0.14 0.10 0.10 0.27
MCN-JDA 0.09 0.09 0.17 0.09 0.06 0.13 0.04 0.07 0.08 0.09 0.07 0.09 0.09 0.08 0.06 0.12
MCN-BON 0.07 0.09 0.38 0.16 0.07 0.18 0.04 0.04 0.03 0.12 0.09 0.04 0.07 0.03 0.04 0.18
MCN-TMJ           NA                    
MCN-TDA                           NA    
JDA-BON 0.02 0.02 0.05 0.04 0.02 0.02 0.02 0.01 0.02 0.05 0.03 0.02 0.02 0.02 0.05 0.06
JDA-TDA                               NA
TDA-BON                               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 2436 2322 14545 11199 2688 1223 4902 14382 2411 9136 8316 3149 5386 729 5652 3478
LGR-LMN 2508 1580 6570 5826 2001 630 1656 7898 506 7745 5367 1390 2350 151 2973 2369
LGR-IHR 0 4 16 606 765 100 1139 2666 688 2751 1705 713 869 86 627 612
LGR-MCN 1158 696 1084 1722 705 466 1336 4316 909 2640 1489 1045 1279 353 1985 578
LGR-JDA 438 426 494 1078 808 282 1358 2733 537 4230 3863 717 1429 67 1259 1892
LGR-BON 757 821 152 150 283 248 1280 3028 1513 838 703 919 977 749 1823 477
LGR-TDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
LGS-LMN 4668 3287 9681 9706 7845 1384 4973 6761 1341 9989 8404 2415 3855 158 2527 3501
LGS-IHR 0 2 13 1079 2874 256 2637 2772 1454 3426 2769 932 1398 185 610 999
LGS-MCN 1662 1164 1628 2886 2626 1023 2386 3846 2254 4004 2702 1507 1839 402 1896 923
LGS-JDA 674 724 713 1626 2865 706 2831 2213 1325 5460 5809 1020 1825 91 955 2495
LGS-BON 1134 1315 227 231 1054 647 1587 2180 3650 1203 1240 1428 1292 746 1382 660
LGS-TDA 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0
LMN-IHR 0 1 3 653 2770 199 1819 2521 487 4944 2050 644 1011 48 520 910
LMN-MCN 1918 1319 1314 1879 2389 524 1441 3535 595 3709 1772 655 871 127 1581 751
LMN-JDA 636 814 626 1015 2671 393 1834 2229 407 6981 4224 474 813 31 947 2302
LMN-BON 1287 1312 162 156 939 308 976 2174 736 999 782 654 625 178 1252 546
IHR-MCN 0 3 1 285 1476 182 1315 1935 935 1527 1155 561 638 193 594 266
IHR-JDA 0 3 0 186 1717 102 1395 1235 624 3160 1803 437 455 35 202 727
IHR-BON 0 3 0 34 540 76 880 973 1377 379 446 544 391 383 418 163
MCN-JDA 826 743 255 505 1533 495 1604 1872 1005 2654 1778 653 870 133 833 782
MCN-BON 1189 827 62 83 555 435 1309 1863 2875 631 429 921 636 1184 1611 201
MCN-TMJ 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
MCN-TDA 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
JDA-BON 596 622 58 79 714 383 1353 1301 1927 875 798 681 711 333 954 826
JDA-TDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
TDA-BON 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1

Last Update: Thu Oct 19 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.