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Lower 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.


Arithmetic mean travel times by reach and year
Reach 2005 2006 2007 2008 2009
HLX-BON 21.88 4.13 6.61 10.88 10.40
Standard errors by reach and year
Reach 2005 2006 2007 2008 2009
HLX-BON 19.76 NA NA 2.98 3.51
Counts by reach and year
Reach 2005 2006 2007 2008 2009
HLX-BON 2 1 1 10 11

Last Update: Sun Dec 10 18:59:03 2017

Data Courtesy of Pacific States Marine Fisheries Commission

The Lower Columbia River Steelhead DPS includes naturally spawned anadromous O. mykiss (steelhead) originating below natural and manmade impassable barriers from rivers between the Cowlitz and Wind Rivers (inclusive) and the Willamette and Hood Rivers (inclusive); excludes such fish originating from the upper Willamette River basin above Willamette Falls. This DPS does include steelhead from seven artificial propagation programs: Cowlitz Trout Hatchery Late Winter-run Program (Lower Cowlitz), Kalama River Wild Winter-run and Summer-run Programs, Clackamas Hatchery Late Winter-run Program (Oregon Department of Fish and Wildlife (ODFW) Stock #122), Sandy Hatchery Late Winter-run Program (ODFW Stock #11), Hood River Winter-run Program (ODFW Stock #50), and Lewis River Wild Late-run Winter Steelhead Program. Definition implemented by Columbia River DART: March 2015.