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Upper Columbia 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
RRH-MCN                 10.12 7.13 7.67 7.21 6.11 8.97 7.66 5.55 6.08 7.67 7.09 8.06 7.64 7.14 9.16
RRH-JDA                 13.96 9.68 10.86 9.64 9.23 12.38 10.23 8.22 8.93 10.40 9.00 11.88 10.61 9.59 13.11
RRH-BON                 14.88 10.08 11.04 10.10 9.52 13.51 10.76 7.97 8.48 11.30 10.50 12.24 11.42 9.88 13.64
MCN-JDA 3.87 3.68 4.72 4.25 2.86 4.20 2.70 2.97 2.87 2.93 3.16 2.60 2.87 3.32 3.53 3.41 2.92 2.51 2.41 2.89 2.97 2.64 4.37
MCN-BON 5.56 5.46 6.53 7.02 3.86 5.63 3.44 3.92 4.50 3.85 3.77 3.61 3.74 4.37 4.18 3.68 3.33 3.67 3.53 4.27 3.72 3.37 4.35
JDA-BON 1.97 1.97 1.95 1.95 1.27 1.62 1.21 1.43 1.74 1.15 1.42 1.42 1.35 1.71 1.52 1.17 1.18 1.41 1.36 1.67 1.39 1.21 1.77
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
RRH-MCN                 0.13 0.08 0.14 0.12 0.08 0.08 0.07 0.11 0.13 0.12 0.19 0.19 0.27 0.20 0.29
RRH-JDA                 0.19 0.07 0.12 0.12 0.12 0.17 0.12 0.07 0.10 0.11 0.09 0.30 0.23 0.10 0.33
RRH-BON                 0.06 0.08 0.18 0.08 0.07 0.05 0.06 0.07 0.07 0.06 0.06 0.05 0.06 0.06 0.12
MCN-JDA 0.32 0.02 0.04 0.02 0.03 0.09 0.04 0.05 0.07 0.04 0.07 0.06 0.08 0.09 0.07 0.07 0.08 0.07 0.09 0.15 0.24 0.10 0.55
MCN-BON 0.30 0.03 0.08 0.09 0.05 0.09 0.05 0.04 0.04 0.06 0.07 0.05 0.05 0.04 0.03 0.08 0.07 0.04 0.10 0.06 0.15 0.08 0.18
JDA-BON 0.10 0.01 0.01 0.01 0.01 0.02 0.01 0.01 0.02 0.01 0.01 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.04 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
RRH-MCN 0 0 0 0 0 0 0 0 738 1028 557 415 806 868 1065 361 410 411 183 226 154 201 101
RRH-JDA 0 0 0 0 0 0 0 0 552 2164 1099 485 633 277 485 1720 939 724 976 138 257 782 122
RRH-BON 0 0 0 0 0 0 0 0 2851 680 448 846 1166 3094 1334 749 1057 1897 1984 2744 1430 1540 710
MCN-JDA 21 3709 2676 5889 1250 275 556 444 216 1040 464 175 160 68 483 619 271 97 59 14 37 82 10
MCN-BON 27 3347 591 929 355 347 235 351 676 249 182 175 203 370 914 204 211 206 54 103 36 80 28
JDA-BON 24 7015 1167 1338 836 253 341 386 478 356 440 248 212 152 637 717 628 479 354 76 58 343 41

Last Update: Mon Feb 24 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 Upper Columbia River Steelhead DPS includes naturally spawned anadromous O. mykiss (steelhead) originating below natural and manmade impassable barriers from the Columbia River and its tributaries upstream of the Yakima River to the U.S.-Canada border. Also, steelhead from six artificial propagation programs: Wenatchee River Program, Wells Hatchery Program (in the Methow and Okanogan Rivers), Winthrop National Fish Hatchery Program, Omak Creek Program, and Ringold Hatchery Program. Definition implemented by Columbia River DART: March 2010.