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Upper 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
MCN-JDA 3.87 3.68 4.72 4.25 2.86 4.20 2.70 2.98 2.87 2.93 3.16 2.60 2.87 3.32 3.54 3.41 2.92 2.52 2.42 2.89 2.97
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 4.19 3.68 3.33 3.66 3.53 4.27 3.72
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 1.40
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
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 0.08 0.09 0.15 0.24
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
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
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
MCN-JDA 21 3709 2676 5889 1250 275 556 443 216 1040 464 175 160 68 479 619 271 90 58 14 37
MCN-BON 27 3347 591 928 355 347 235 350 676 249 182 175 203 370 908 204 211 187 54 103 36
JDA-BON 24 7015 1167 1338 836 253 341 385 478 356 440 248 212 152 636 717 627 419 354 76 57

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

Data Courtesy of Pacific States Marine Fisheries Commission

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.