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Middle Columbia 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
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 5.03 3.46 3.56 3.05 3.01 3.03 2.92 3.05 4.92 3.14 2.54 2.74 3.64 4.66 4.82 3.12
MCN-BON 6.16 6.09 7.10 6.93 4.53 5.89 5.12 4.63 4.97 4.58 4.10 4.29 3.83 5.05 4.25 3.09 3.53 4.36 6.51 4.97 5.05
TMJ-JDA 6.79 8.97 6.01 8.04 4.74 4.65 25.71 4.10 6.43 3.78 3.99 4.13 3.77 4.58 3.64 2.97 2.75 3.22 2.97 3.79 3.82
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 5.86 4.82 4.00 3.68 4.43 4.40 5.06 5.49
JDA-BON 2.05 2.24 1.93 2.11 1.47 1.56 1.50 1.62 1.94 1.49 1.42 1.65 1.56 2.04 1.55 1.20 1.21 1.58 1.48 1.67 1.45
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
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 0.41 0.17 0.12 0.12 0.10 0.11 0.19 0.19 0.65 0.14 0.09 0.15 0.15 0.67 1.04 0.54
MCN-BON 0.53 0.33 0.52 0.66 0.26 0.47 0.25 0.13 0.09 0.30 0.25 0.19 0.18 0.22 0.09 0.11 0.15 0.18 0.45 0.45 0.66
TMJ-JDA 0.67 1.18 0.56 1.03 0.21 0.20 NA 0.25 0.24 0.14 0.17 0.12 0.08 0.15 0.06 0.05 0.06 0.09 0.05 0.24 0.37
TMJ-BON 0.55 1.02 1.11 3.53 0.31 0.27   0.21 0.14 0.35 0.17 0.10 0.09 0.04 0.04 0.10 0.07 0.07 0.05 0.04 0.30
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 0.04 0.05 0.02 0.01 0.02 0.02 0.02 0.04 0.05
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
PRO-MCN 34 36 41 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
PRO-BON 25 31 14 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 30 109 156 118 180 109 44 35 12 68 111 68 71 19 2 6
MCN-BON 11 36 19 12 24 25 73 103 251 37 26 39 35 31 130 43 59 34 29 13 12
TMJ-JDA 16 14 22 42 153 64 1 52 223 98 187 262 522 127 315 453 298 157 317 42 29
TMJ-BON 7 16 3 12 45 57 0 32 551 33 87 290 419 1317 599 129 276 232 619 774 87
JDA-BON 27 63 63 154 150 184 257 270 375 167 174 215 173 120 300 309 267 283 251 57 35

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

Data Courtesy of Pacific States Marine Fisheries Commission

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.