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Adult 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 2023
BON-MCN 21.92       27.81     18.83   16.36   19.06 16.87     23.39   24.95 18.77      
BON-TMJ         77.25     32.67   58.59   179.02 67.19     183.27 1760.09 221.68     -65.42
BON-TDA                       4.25 3.65     6.18   4.80 3.37      
BON-JDA                                   14.75 11.65     -9.87
TDA-MCN                       6.79 7.52     6.55   7.44 8.92      
TDA-TMJ                       14.37 23.03     60.93   11.32 95.51      
TDA-JDA                                   2.02 3.03      
JDA-MCN                                   3.31 3.53      
JDA-TMJ                                   8.06 21.80     9.30
MCN-TMJ         22.61     9.27   24.08   13.37 40.27     48.79   5.61 103.35     6.09
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
BON-MCN 6.03       3.13     1.00   0.73   1.33 0.90     1.89   2.30 1.55      
BON-TMJ         28.16     15.76   7.49   446.74 13.13     184.45  59894.60 135.36     24.18
BON-TDA                       0.16 0.11     0.43   0.27 0.15      
BON-JDA                                   1.48 1.24     NA
TDA-MCN                       0.29 0.28     0.28   0.45 0.66      
TDA-TMJ                       3.94 4.33     2.96   3.29 15.22      
TDA-JDA                                   0.12 0.26      
JDA-MCN                                   0.10 0.13      
JDA-TMJ                                   2.02 12.83     2.59
MCN-TMJ         15.83     6.34   11.70   6.61 8.96     2.61   2.86 7.72     19.51
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
BON-MCN 16 0 0 0 117 0 0 365 0 289 0 275 350 0 0 203 0 185 123 0 0 0
BON-TMJ 0 0 0 0 4 0 0 4 0 6 0 20 61 0 0 24 0 16 13 0 0 3
BON-TDA 0 0 0 0 0 0 0 0 0 0 0 547 651 0 0 331 0 333 208 0 0 0
BON-JDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 240 157 0 0 1
TDA-MCN 0 0 0 0 0 0 0 0 0 0 0 269 350 0 0 204 0 191 124 0 0 0
TDA-TMJ 0 0 0 0 0 0 0 0 0 0 0 19 62 0 0 23 0 12 10 0 0 0
TDA-JDA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 247 157 0 0 0
JDA-MCN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 190 124 0 0 0
JDA-TMJ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13 15 0 0 7
MCN-TMJ 0 0 0 0 2 0 0 2 0 2 0 9 19 0 0 15 0 4 2 0 0 4

Last Update: Wed May 31 18:59:01 2023

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.