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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.


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 3.21 2.81 3.42 3.28 2.17 2.81 2.71 2.26 2.20 2.12 1.91 2.14 2.30 2.57 2.02 1.90 1.82 1.73 2.29 2.27 2.99
LGR-LMN 6.60 5.36 7.06 5.86 4.10 5.62 3.84 4.45 3.44 3.93 3.81 3.59 4.27 5.10 4.08 3.60 3.31 3.33 3.99 4.17 4.28
LGR-IHR   7.21 8.45 6.41 5.14 6.52 5.50 6.72 5.21 5.13 5.01 5.51 5.17 5.91 5.41 4.98 4.14 4.62 4.75 5.72 6.55
LGR-MCN 10.16 8.89 9.34 8.87 7.02 8.03 7.71 8.13 7.56 8.26 6.46 7.94 7.48 8.56 6.61 6.69 5.74 6.62 6.86 7.71 9.17
LGR-JDA 13.74 12.59 13.82 12.65 10.02 11.70 9.93 12.58 10.77 10.05 9.45 10.74 10.68 11.47 9.53 9.09 7.73 9.98 8.99 10.59 11.34
LGR-BON 15.50 14.86 15.60 14.43 11.15 13.19 12.34 13.00 12.43 12.92 10.05 10.85 10.76 13.52 10.29 9.48 8.22 9.95 10.96 11.36 12.63
LGS-LMN 2.47 1.60 2.42 1.97 1.51 2.37 1.32 1.71 1.38 1.80 1.62 1.56 1.50 2.18 1.77 1.51 1.31 1.34 2.16 2.49 1.17
LGS-IHR   3.94 4.45 2.96 2.60 3.58 2.62 3.26 3.14 3.20 2.87 3.15 2.65 3.52 3.13 2.85 2.23 2.61 3.10 3.78 2.33
LGS-MCN 6.00 4.70 5.45 4.93 4.21 5.05 4.33 5.25 5.40 5.75 4.25 5.31 4.76 5.68 4.55 4.44 3.55 4.30 5.72 6.55 3.86
LGS-JDA 9.51 8.00 9.69 8.80 7.18 8.55 6.72 9.25 8.73 8.42 7.25 8.18 7.90 9.48 7.39 7.20 5.63 7.44 7.27 9.73 5.75
LGS-BON 9.50 10.40 11.54 10.58 8.46 10.20 8.49 9.91 10.66 10.56 7.79 8.97 8.18 10.34 8.27 7.63 6.24 8.25 9.34 10.68 8.08
LMN-IHR   1.08 2.22 1.18 1.31 1.27 1.15 1.51 1.27 1.25 1.46 1.34 1.18 2.22 1.45 1.31 1.05 1.24 1.41 2.36 1.07
LMN-MCN 2.97 2.64 2.92 2.96 2.93 2.76 2.55 3.38 3.17 3.17 2.77 2.88 2.88 3.88 2.90 2.81 2.25 2.83 3.06 4.20 2.22
LMN-JDA 6.35 5.79 6.75 6.56 6.13 6.07 4.92 7.25 5.87 5.55 5.64 5.35 5.69 7.14 5.70 5.43 4.39 5.80 4.89 10.09 4.19
LMN-BON 7.79 8.16 9.13 8.28 7.44 7.54 6.08 7.92 8.34 7.33 6.46 6.20 6.16 8.52 6.66 6.06 5.05 6.70 6.35 7.90 5.73
IHR-MCN   1.57 2.16 1.64 1.59 1.39 1.42 1.72 1.80 1.54 1.28 1.39 1.42 2.06 1.50 1.41 1.01 1.55 1.35 2.05 1.45
IHR-JDA   5.96   5.05 4.82 4.87 3.92 5.20 4.95 4.11 4.15 3.86 4.28 5.06 4.31 4.09 3.19 4.56 3.71 5.56 3.79
IHR-BON   6.55   7.16 6.07 6.35 5.14 6.06 6.76 5.62 4.78 4.72 4.81 6.36 5.47 4.72 3.74 5.71 4.92 6.21 4.89
MCN-JDA 3.91 3.27 4.10 3.51 3.31 3.57 2.78 3.73 3.82 3.61 3.02 2.94 3.16 3.28 2.92 2.74 2.48 3.04 2.57 3.55 2.64
MCN-BON 5.65 5.18 6.29 5.44 4.52 5.16 4.06 4.58 5.24 4.66 3.84 4.01 3.91 4.59 4.02 3.48 3.16 4.21 3.88 4.53 3.89
JDA-BON 1.93 1.69 1.87 1.77 1.46 1.54 1.41 1.65 1.95 1.38 1.35 1.50 1.42 1.82 1.48 1.18 1.16 1.56 1.45 1.87 1.37
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 0.03 0.01 0.01 0.02 0.03 0.02 0.01 0.02 0.01 0.01 0.02 0.01 0.03 0.01 0.01 0.01 0.01 0.02 0.02 0.03
LGR-LMN 0.06 0.07 0.04 0.03 0.04 0.08 0.04 0.02 0.07 0.02 0.02 0.04 0.04 0.15 0.03 0.03 0.03 0.03 0.06 0.07 0.07
LGR-IHR   1.06 1.16 0.09 0.06 0.16 0.07 0.05 0.09 0.05 0.05 0.08 0.06 0.18 0.06 0.07 0.07 0.08 0.07 0.08 0.17
LGR-MCN 0.10 0.11 0.10 0.06 0.08 0.09 0.07 0.04 0.08 0.07 0.06 0.08 0.06 0.11 0.04 0.10 0.12 0.15 0.12 0.07 0.25
LGR-JDA 0.19 0.20 0.17 0.09 0.10 0.17 0.09 0.07 0.16 0.07 0.05 0.13 0.08 0.32 0.05 0.06 0.09 0.14 0.08 0.15 0.27
LGR-BON 0.16 0.17 0.31 0.26 0.15 0.18 0.09 0.05 0.08 0.18 0.10 0.10 0.08 0.10 0.04 0.11 0.09 0.10 0.04 0.03 0.10
LGS-LMN 0.02 0.01 0.02 0.01 0.01 0.03 0.01 0.01 0.02 0.01 0.01 0.01 0.01 0.07 0.01 0.01 0.01 0.01 0.13 0.24 0.03
LGS-IHR   0.41 0.47 0.03 0.02 0.06 0.02 0.03 0.04 0.03 0.02 0.04 0.03 0.06 0.03 0.03 0.03 0.04 0.16 0.33 0.14
LGS-MCN 0.05 0.05 0.05 0.03 0.02 0.03 0.03 0.03 0.04 0.04 0.03 0.05 0.03 0.06 0.02 0.06 0.05 0.06 0.36 0.39 0.20
LGS-JDA 0.12 0.10 0.11 0.05 0.03 0.08 0.04 0.06 0.09 0.05 0.03 0.08 0.05 0.22 0.04 0.05 0.05 0.08 0.23 0.64 0.24
LGS-BON 0.19 0.09 0.21 0.16 0.05 0.10 0.05 0.05 0.04 0.12 0.05 0.06 0.05 0.07 0.03 0.08 0.05 0.05 0.10 0.16 0.21
LMN-IHR   NA 0.35 0.01 0.01 0.02 0.01 0.01 0.03 0.01 0.01 0.02 0.01 0.09 0.02 0.02 0.02 0.01 0.12 0.49 0.06
LMN-MCN 0.02 0.02 0.02 0.01 0.02 0.02 0.02 0.02 0.05 0.02 0.02 0.04 0.03 0.08 0.02 0.04 0.04 0.04 0.33 0.30 0.10
LMN-JDA 0.08 0.06 0.07 0.04 0.03 0.06 0.03 0.05 0.11 0.03 0.03 0.06 0.06 0.22 0.04 0.03 0.05 0.06 0.21 2.16 0.15
LMN-BON 0.06 0.06 0.19 0.14 0.06 0.07 0.05 0.04 0.09 0.09 0.05 0.05 0.05 0.10 0.03 0.06 0.04 0.04 0.14 0.17 0.13
IHR-MCN   0.17 NA 0.03 0.02 0.03 0.01 0.01 0.02 0.02 0.01 0.02 0.02 0.04 0.02 0.03 0.03 0.04 0.08 0.19 0.12
IHR-JDA   3.13   0.08 0.04 0.13 0.03 0.05 0.07 0.03 0.03 0.05 0.06 0.19 0.07 0.05 0.07 0.09 0.09 0.40 0.22
IHR-BON   0.69   0.31 0.06 0.17 0.04 0.04 0.04 0.11 0.05 0.04 0.06 0.06 0.05 0.10 0.05 0.06 0.07 0.13 0.16
MCN-JDA 0.05 0.04 0.09 0.04 0.03 0.05 0.02 0.03 0.05 0.04 0.03 0.04 0.04 0.06 0.03 0.03 0.06 0.07 0.09 0.19 0.16
MCN-BON 0.05 0.05 0.26 0.13 0.04 0.07 0.02 0.02 0.02 0.06 0.04 0.03 0.03 0.02 0.02 0.06 0.06 0.05 0.05 0.05 0.15
JDA-BON 0.02 0.01 0.04 0.03 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.01 0.01 0.01 0.01 0.01 0.03 0.04
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 2450 2341 14351 11469 3068 1250 5002 14538 2435 9323 8415 3194 5497 737 5695 4071 2657 1608 1875 1017 2257
LGR-LMN 2521 1594 6521 5969 2344 651 1768 10016 512 8437 5672 1425 2450 158 3628 2876 1433 1526 754 511 998
LGR-IHR 0 5 15 628 945 106 1261 3628 694 3032 1858 732 892 86 756 803 327 328 445 405 368
LGR-MCN 1102 695 1071 1790 856 503 1532 5992 920 2901 1609 1098 1354 375 2473 748 184 220 338 822 268
LGR-JDA 446 431 490 1131 997 305 1538 3900 546 4672 4232 756 1502 72 1687 2460 529 425 983 311 286
LGR-BON 771 831 151 151 331 270 1499 4133 1527 923 794 951 1022 797 2245 621 512 547 3446 6439 1398
LGS-LMN 4679 3328 9719 9929 8598 1497 5530 10684 1371 11066 9156 2500 4032 215 4416 4478 2693 2429 75 18 291
LGS-IHR 0 4 14 1110 3283 286 3301 4147 1518 3840 3088 964 1436 201 870 1304 584 594 62 17 67
LGS-MCN 1581 1169 1628 2979 2974 1256 3336 6338 2355 4538 2944 1672 1982 530 3002 1225 397 411 32 31 73
LGS-JDA 684 746 716 1700 3240 870 3666 3962 1413 6039 6482 1127 1976 113 1887 3517 1039 568 94 11 82
LGS-BON 1218 1344 228 236 1163 785 2766 3892 3878 1377 1388 1563 1398 1033 2401 902 972 890 370 199 154
LMN-IHR 0 1 3 730 3829 266 2195 3484 501 5340 2337 652 1024 50 664 1163 425 738 25 8 77
LMN-MCN 1828 1320 1314 2143 3195 731 1675 5010 613 4022 2012 668 973 135 2185 985 250 468 18 23 64
LMN-JDA 650 844 629 1200 3653 623 2117 3366 417 7603 4746 488 933 33 1446 3150 707 739 55 4 87
LMN-BON 1304 1347 167 173 1252 499 1230 3130 759 1122 953 665 702 208 1778 756 627 1090 94 81 118
IHR-MCN 0 4 1 309 1797 203 1467 2373 949 1639 1215 567 646 193 669 338 94 190 41 20 35
IHR-JDA 0 3 0 202 2093 117 1538 1574 634 3360 1920 441 462 35 249 900 161 241 94 9 31
IHR-BON 0 4 0 37 653 84 1023 1224 1403 414 468 551 395 385 458 201 164 364 172 91 69
MCN-JDA 768 782 258 548 1852 568 1810 2484 1022 2849 1881 681 909 134 1061 983 184 198 66 27 42
MCN-BON 1129 877 64 89 661 506 1556 2363 2928 682 462 948 668 1203 1873 250 163 338 174 292 62
JDA-BON 634 641 62 87 862 436 1610 1739 2006 951 883 704 746 351 1196 1046 553 707 516 155 74

Last Update: Thu Sep 29 18:59:01 2022

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.