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Snake River Steelhead DPS Historical and Current Year Mean Travel Time Estimates
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 2023 2024
LGR-LGS 3.21 2.81 3.42 3.28 2.17 2.81 2.71 2.26 2.19 2.12 1.91 2.14 2.30 2.57 2.02 1.90 2.10 1.75 2.51 2.27 2.99 1.96 2.47
LGR-LMN 6.60 5.36 7.06 5.86 4.10 5.62 3.84 4.45 3.41 3.93 3.81 3.59 4.27 5.10 4.08 3.60 4.19 3.47 4.20 4.17 4.27 3.47 4.18
LGR-IHR   7.24 8.48 6.41 5.14 6.52 5.50 6.72 5.18 5.13 5.01 5.51 5.17 5.91 5.41 4.98 4.60 5.04 5.08 5.72 6.52 4.44 5.47
LGR-MCN 10.16 8.89 9.34 8.87 7.02 8.03 7.71 8.13 7.53 8.26 6.46 7.94 7.48 8.56 6.61 6.70 7.03 7.23 7.41 7.71 9.17 7.38 7.72
LGR-JDA 13.74 12.59 13.82 12.65 10.02 11.70 9.93 12.58 10.71 10.05 9.45 10.74 10.68 11.47 9.53 9.08 9.73 11.35 9.43 10.59 11.29 9.41 11.10
LGR-BON 15.50 14.86 15.60 14.43 11.15 13.19 12.34 13.00 12.29 12.92 10.05 10.85 10.76 13.52 10.29 9.48 9.58 11.61 11.46 11.36 12.63 9.87 11.85
LGS-LMN 2.47 1.60 2.42 1.97 1.51 2.37 1.31 1.71 1.38 1.80 1.62 1.56 1.50 2.18 1.77 1.51 1.76 1.46 2.25 2.49 1.17 1.38 2.79
LGS-IHR   3.56 4.47 2.96 2.60 3.58 2.62 3.26 3.12 3.20 2.87 3.15 2.65 3.52 3.13 2.85 2.51 2.96 3.21 3.78 2.33 2.36 4.15
LGS-MCN 6.00 4.70 5.45 4.93 4.21 5.05 4.33 5.25 5.38 5.75 4.25 5.31 4.76 5.68 4.55 4.44 4.41 5.06 6.28 6.55 3.86 4.45 6.57
LGS-JDA 9.52 8.00 9.69 8.80 7.18 8.55 6.72 9.25 8.68 8.42 7.25 8.18 7.90 9.48 7.39 7.20 7.20 8.98 7.48 9.73 5.75 6.54 10.29
LGS-BON 9.51 10.40 11.54 10.58 8.46 10.20 8.49 9.91 10.60 10.56 7.79 8.97 8.18 10.33 8.27 7.63 7.34 9.28 9.55 10.68 8.08 7.32 11.41
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 1.19 1.40 1.37 2.36 1.07 1.09 2.08
LMN-MCN 2.97 2.64 2.92 2.97 2.93 2.76 2.55 3.38 3.15 3.17 2.77 2.88 2.88 3.88 2.90 2.81 2.76 3.45 3.17 4.20 2.22 2.23 3.83
LMN-JDA 6.36 5.79 6.75 6.56 6.13 6.07 4.92 7.25 5.82 5.55 5.64 5.35 5.69 7.14 5.70 5.43 5.62 7.06 4.89 10.09 4.17 4.74 7.26
LMN-BON 7.79 8.15 9.13 8.28 7.44 7.54 6.08 7.92 8.28 7.33 6.46 6.21 6.16 8.52 6.66 6.06 6.02 7.52 6.35 7.93 5.73 5.45 8.40
IHR-MCN   1.55 2.16 1.64 1.59 1.39 1.42 1.72 1.79 1.54 1.28 1.39 1.42 2.06 1.50 1.41 1.13 1.95 1.37 2.05 1.45 1.15 2.27
IHR-JDA   5.96   5.05 4.82 4.87 3.92 5.20 4.94 4.11 4.15 3.86 4.28 5.06 4.31 4.09 3.68 5.57 3.71 5.56 3.70 4.00 5.01
IHR-BON   6.67   7.16 6.07 6.35 5.14 6.06 6.73 5.62 4.78 4.72 4.81 6.36 5.47 4.71 4.06 6.31 4.94 6.21 4.89 4.40 6.45
MCN-JDA 3.91 3.28 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 2.94 3.78 2.57 3.55 2.64 2.73 4.95
MCN-BON 5.65 5.18 6.29 5.44 4.52 5.16 4.06 4.58 5.23 4.66 3.84 4.01 3.91 4.59 4.02 3.48 3.42 4.60 3.88 4.53 3.89 3.64 4.93
JDA-BON 1.93 1.69 1.87 1.77 1.46 1.54 1.41 1.65 1.94 1.38 1.35 1.50 1.42 1.82 1.48 1.18 1.26 1.60 1.45 1.87 1.37 1.27 1.91
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 2023 2024
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 0.01 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 0.02 0.06 0.07 0.07 0.03 0.12
LGR-IHR   1.38 1.25 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 0.05 0.08 0.08 0.17 0.08 0.10
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 0.14 0.07 0.13 0.07 0.25 0.19 0.16
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 0.11 0.07 0.08 0.15 0.27 0.08 0.33
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 0.08 0.04 0.03 0.10 0.07 0.11
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 0.14 0.24 0.03 0.02 0.26
LGS-IHR   0.38 0.51 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 0.03 0.17 0.33 0.14 0.06 0.10
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 0.07 0.05 0.34 0.39 0.20 0.24 0.28
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 0.06 0.06 0.23 0.64 0.24 0.10 0.33
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 0.06 0.10 0.16 0.21 0.07 0.13
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 0.11 0.49 0.06 0.03 0.14
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 0.05 0.04 0.36 0.30 0.10 0.09 0.22
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 0.05 0.21 2.16 0.15 0.07 0.44
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 0.05 0.05 0.14 0.17 0.13 0.05 0.40
IHR-MCN   0.24 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 0.04 0.04 0.08 0.19 0.12 0.07 0.17
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 0.08 0.08 0.09 0.40 0.22 0.11 0.27
IHR-BON   1.00   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 0.06 0.07 0.07 0.13 0.16 0.07 0.17
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 0.05 0.09 0.19 0.16 0.10 0.31
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 0.05 0.04 0.05 0.05 0.15 0.09 0.17
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 0.01 0.07
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 2023 2024
LGR-LGS 2450 2340 14351 11467 3069 1250 5002 14538 2335 9320 8415 3194 5497 736 5695 4079 5561 6257 2449 1017 2257 3773 935
LGR-LMN 2521 1594 6521 5969 2344 651 1768 10016 494 8436 5672 1425 2450 158 3628 2881 3391 6064 842 511 1000 3041 187
LGR-IHR 0 4 14 628 945 106 1261 3628 679 3032 1858 732 892 86 756 809 528 1459 524 405 369 493 268
LGR-MCN 1102 695 1071 1790 856 503 1532 5992 888 2900 1609 1098 1354 375 2473 749 434 1114 436 822 268 302 171
LGR-JDA 446 431 490 1131 997 305 1538 3900 518 4672 4232 756 1502 72 1687 2465 1345 2015 1156 311 287 1518 115
LGR-BON 771 831 151 151 331 270 1499 4133 1395 921 794 951 1022 797 2245 622 1152 1656 4215 6440 1399 2156 755
LGS-LMN 4680 3329 9722 9930 8603 1497 5530 10688 1339 11065 9157 2501 4032 215 4416 4482 5561 6534 81 18 293 1049 37
LGS-IHR 0 2 13 1110 3286 286 3301 4148 1487 3841 3088 964 1436 201 870 1305 862 1637 67 17 67 171 85
LGS-MCN 1583 1169 1629 2980 2976 1256 3336 6338 2274 4538 2944 1672 1982 530 3002 1227 781 1283 45 31 73 67 49
LGS-JDA 686 747 716 1700 3244 870 3666 3962 1354 6038 6482 1127 1978 113 1887 3523 2329 2038 105 11 82 395 36
LGS-BON 1221 1345 228 236 1163 785 2767 3893 3672 1377 1389 1563 1398 1034 2401 905 1949 1807 411 199 154 612 219
LMN-IHR 0 1 3 730 3831 267 2195 3485 492 5341 2337 652 1024 50 664 1165 636 1929 24 8 78 182 15
LMN-MCN 1828 1322 1314 2144 3197 731 1676 5010 596 4022 2012 668 973 135 2185 987 547 1380 19 23 64 67 17
LMN-JDA 651 844 629 1200 3657 623 2117 3366 402 7602 4746 488 933 33 1446 3157 1729 2273 55 4 88 343 7
LMN-BON 1304 1346 167 173 1252 499 1231 3130 716 1122 954 666 702 208 1778 756 1403 2107 94 83 118 479 27
IHR-MCN 0 3 1 309 1798 203 1468 2373 923 1640 1215 567 646 193 670 339 145 448 42 20 35 28 29
IHR-JDA 0 3 0 202 2093 117 1538 1574 620 3360 1920 442 462 35 249 901 296 671 94 9 32 134 18
IHR-BON 0 3 0 37 653 84 1023 1224 1338 414 468 551 395 385 458 202 279 667 173 91 69 157 87
MCN-JDA 770 783 258 548 1853 568 1810 2485 999 2849 1881 681 909 134 1061 983 379 645 66 27 42 94 17
MCN-BON 1132 877 64 89 662 506 1557 2363 2799 680 462 948 668 1203 1873 251 308 573 174 292 62 95 54
JDA-BON 635 642 62 87 862 436 1611 1739 1905 951 883 704 746 351 1196 1046 1123 1067 516 155 74 523 50

Last Update: Sat Mar 15 20:59:01 2025

Query Notes
  • ESU (Evolutionarily Significant Unit) and DPS (Distinct Population Segment) Glossary, DART PIT Tag and ESU Metadata & Glossary
  • 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.
  • 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.