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Upper Columbia River Chinook Spring ESU 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 11.53               10.82 12.30 11.38 9.29 11.51 11.82 9.48 9.70 10.65 11.12 10.59 9.86 9.88 10.17 14.68
RRH-JDA 14.64               13.98 15.33 15.53 12.69 15.40 15.22 12.64 12.39 12.50 13.95 12.55 13.44 12.26 12.81 15.06
RRH-BON 15.94               14.57 17.08 15.77 12.91 13.62 16.06 12.80 12.17 12.74 14.28 13.88 13.55 14.46 12.65 16.66
MCN-JDA 3.82 3.45 3.39 4.07 4.08 3.65 3.37 3.47 4.08 3.33 3.64 3.42 3.23 3.95 3.11 3.05 3.23 3.11 2.69 3.84 2.59 3.07 4.38
MCN-BON 5.61 5.13 4.85 5.64 5.57 4.86 5.01 4.91 5.45 4.91 4.75 4.35 4.24 4.77 3.88 3.82 3.90 4.43 4.37 4.67 4.58 3.94 4.75
JDA-BON 2.34 2.00 1.93 2.16 1.85 1.85 1.65 1.72 1.89 1.58 1.82 1.64 1.61 1.80 1.61 1.45 1.41 1.66 1.72 1.73 1.73 1.56 1.83
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 0.17               0.13 0.21 0.24 0.13 0.26 0.13 0.08 0.20 0.20 0.21 0.18 0.19 0.54 0.34 0.88
RRH-JDA 0.32               0.29 0.23 0.37 0.23 0.38 0.22 0.16 0.17 0.20 0.19 0.16 0.36 0.34 0.21 0.78
RRH-BON 0.44               0.13 0.45 0.36 0.18 0.30 0.12 0.11 0.18 0.20 0.13 0.13 0.09 0.17 0.13 0.24
MCN-JDA 0.05 0.03 0.04 0.10 0.08 0.03 0.04 0.07 0.09 0.05 0.05 0.05 0.04 0.09 0.03 0.04 0.06 0.08 0.05 0.38 0.21 0.12 0.84
MCN-BON 0.10 0.05 0.06 0.16 0.13 0.05 0.11 0.07 0.06 0.12 0.06 0.06 0.07 0.05 0.02 0.05 0.08 0.07 0.09 0.10 0.23 0.11 0.15
JDA-BON 0.04 0.01 0.02 0.06 0.05 0.02 0.02 0.03 0.02 0.04 0.02 0.02 0.02 0.02 0.01 0.01 0.02 0.02 0.02 0.04 0.05 0.02 0.08
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 434 0 0 0 0 0 0 0 970 568 496 957 450 636 1342 503 456 391 453 330 78 103 57
RRH-JDA 183 0 0 0 0 0 0 0 339 773 316 459 312 233 466 877 451 548 798 160 176 255 60
RRH-BON 108 0 0 0 0 0 0 0 1104 135 266 494 299 952 825 578 460 1141 1004 1571 677 888 554
MCN-JDA 360 1306 348 161 371 1332 785 391 347 581 747 540 545 159 668 669 304 133 140 18 13 49 7
MCN-BON 184 848 254 86 184 406 222 418 796 125 463 382 240 378 871 305 179 191 107 98 19 59 44
JDA-BON 224 955 234 57 131 451 266 218 301 103 410 235 240 191 434 537 201 263 267 53 55 177 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 Spring Chinook ESU includes naturally spawned spring-run Chinook salmon originating from Columbia River tributaries upstream of the Rock Island Dam and downstream of Chief Joseph Dam (excluding the Okanogan River subbasin). Also, spring-run Chinook salmon from six artificial propagation programs: Twisp River Program, Chewuch River Program, Methow Program, Winthrop National Fish Hatchery Program, Chiwawa River Program, and White River Program. Definition implemented by Columbia River DART: March 2010.