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Middle 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
PRO-MCN 5.46 5.97 6.00                                        
PRO-JDA 11.69 11.99 12.05                                        
PRO-BON 11.39 13.26 14.58                                        
MCN-JDA 4.04 4.65 4.80 4.42 3.34 4.92 3.33 3.54 3.05 2.99 2.96 2.95 3.20 4.63 3.18 2.54 2.74 3.64 4.66 4.82 3.12 3.11 8.30
MCN-BON 6.16 6.09 7.10 6.93 4.53 5.79 5.07 4.63 4.97 4.59 4.06 4.09 3.92 4.83 4.32 3.09 3.53 4.36 6.51 4.97 5.05 3.15 6.24
TMJ-JDA 6.79 8.97 6.01 8.04 4.74 4.65 25.71 4.10 6.43 3.75 3.99 4.13 3.76 4.58 3.64 2.97 2.83 3.22 2.90 3.79 3.82 3.16 4.41
TMJ-BON 6.96 8.74 9.78 16.01 5.91 6.12   4.94 7.15 5.58 4.74 5.13 4.79 5.87 4.82 4.00 3.68 4.43 4.23 5.06 5.49 4.10 5.88
JDA-BON 2.05 2.24 1.93 2.11 1.47 1.56 1.50 1.62 1.94 1.49 1.42 1.64 1.55 2.03 1.54 1.20 1.22 1.58 1.45 1.67 1.45 1.33 1.89
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
PRO-MCN 0.47 0.50 0.44                                        
PRO-JDA 0.67 0.94 0.64                                        
PRO-BON 0.75 0.93 1.57                                        
MCN-JDA 0.28 0.30 0.26 0.21 0.12 0.40 0.16 0.11 0.12 0.10 0.09 0.18 0.17 0.54 0.11 0.09 0.15 0.15 0.67 1.04 0.54 0.43 NA
MCN-BON 0.53 0.33 0.52 0.66 0.26 0.44 0.23 0.13 0.09 0.29 0.22 0.15 0.16 0.15 0.08 0.11 0.15 0.18 0.45 0.45 0.66 0.18 0.58
TMJ-JDA 0.67 1.18 0.56 1.03 0.21 0.20 NA 0.25 0.24 0.13 0.17 0.12 0.08 0.14 0.06 0.05 0.06 0.09 0.04 0.24 0.37 0.12 0.14
TMJ-BON 0.55 1.02 1.11 3.53 0.31 0.27   0.21 0.14 0.34 0.17 0.10 0.09 0.04 0.04 0.10 0.06 0.07 0.04 0.04 0.30 0.05 0.10
JDA-BON 0.11 0.09 0.05 0.04 0.03 0.02 0.03 0.02 0.03 0.03 0.02 0.03 0.03 0.05 0.02 0.01 0.02 0.02 0.02 0.04 0.05 0.03 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
PRO-MCN 34 36 41 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PRO-JDA 35 44 50 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PRO-BON 25 31 14 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
MCN-JDA 19 32 61 63 108 31 117 160 118 190 134 50 48 15 106 112 68 71 19 2 6 13 1
MCN-BON 11 36 19 12 24 26 76 103 252 38 29 52 53 51 176 43 59 34 29 13 12 19 18
TMJ-JDA 16 14 22 42 153 64 1 52 223 103 187 262 526 132 315 453 342 157 430 42 29 112 91
TMJ-BON 7 16 3 12 45 57 0 32 551 34 87 290 420 1375 598 129 323 232 812 774 87 333 241
JDA-BON 27 63 63 154 150 185 257 271 376 167 184 226 183 131 333 310 277 283 300 59 35 127 43

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 Middle 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 Wind and Hood Rivers (exclusive) to and including the Yakima River; excludes such fish originating from the Snake River Basin. This DPS does include steelhead from seven artificial propagation programs: Touchet River Endemic Program, Yakima River Kelt Reconditioning Program (in Satus Creek, Toppenish Creek, Naches River, and Upper Yakima River), Umatilla River Program (Oregon Department of Fish and Wildlife (ODFW) Stock #91), and Deschutes River Program (ODFW Stock #66). This DPS does not include steelhead that are designated as part of an experimental population. Definition implemented by Columbia River DART: March 2010.