Site Type

Site Name


LTR - Lower Tucannon River

This is an in-stream interrogation system that has variously consisted of one or two groups of arrays, about a kilometer apart, located near the mouth of the Tucannon River. From Oct. 2005 until April 2008 the downstream array group consisted of two tandem 'log' antenna arrays that spanned the low-water channel above the boat ramp. The upstream array group was located at an abandoned railroad bridge abutment upstream of Hwy 261 on the Tucannon River downstream from Starbuck. The upstream array (A0) operated from Oct. 2005 until January 2009. Its various configurations included both pass-through and pass-over antennas. A single array (C0) with six PVC pipe antennas was re-deployed above the boat ramp in Sept. 2009. Responsibility for site operations transferred from USFWS to WDFW on Jan. 7, 2010. The CO in-stream array was relocated below the Hwy 261 bridge on Sept. 29, 2010.

Operated by:


First year:


Last year:




Site Contacts


Todd Miller
(509) 382-4755


Lance Ross
(509) 382-4755


Operational Dates

Year Start Date End Date Notes
2014 1/1/2014 1/1/2015
2016 1/1/2016 1/1/2017 Start and end dates based on file open and close dates.
2015 1/1/2015 1/1/2016
2017 1/1/2017 1/1/2018 Start and end dates based on file open and close dates.
2005 10/1/2005 1/1/2006 First year of operation.
2006 1/1/2006 1/1/2007
2007 1/1/2007 1/1/2008
2008 1/1/2008 1/1/2009 On May 22, Steve Anglea ( discovered that the downstream antenna at the old railroad bridge (A6) had washed away sometime on May 19, and that the entire downstream pass-over antenna array had been dislodged by a tree. The pass-over system was shut down on May 22.
2009 1/1/2009 11/22/2009 The original A0 MUX array was washed out on Jan. 8, 2009. The downstream antennas in the Tucannon River (identified by transceiver C0) were reinstalled on September 10. These antennae replace the upstream array (transceiver A0) that was blown out. The configuration of the new antenna array is as follows, looking downstream: Beginning on the left hand streambank is C1, C2, and C3 (C3 is approximately mid stream). Slightly downstream (approx. 2 feet) beginning mid stream and going towards the right hand streambank are C4, C5 and C6. There is overlap of C2 and C3 with C4 and C5. Data collected between Nov. 22, 2009 and Jan. 7, 2010 were lost due to an equipment failure.
2010 1/7/2010 1/1/2011 Data collected prior to Jan. 7 were lost due to an equipment failure. No data are available between Jan. 19 and Feb. 4 due to a complete loss of power and failure of the lithium battery. No data are available between Feb. 16-18, Apr. 16-21, or May 10-24 due to loss of buffered records. No data available between Sept. 1-20; propane ran out. Detectors were moved upstream near the Hwy 261 bridge on Sept. 29, 2010. No data between Dec. 1-13 due to a TEG malfunction.
2011 1/1/2011 1/1/2012 Site down from February 24-28 and April 3-12. High flows caused various antennas to lose power or have high noise throughout the season - see event logs for details. Three antennas were replaced August 16, but not fully functionaly until August 29.
2012 1/1/2012 1/1/2013
2013 1/1/2013 1/1/2014
2018 1/1/2018 11/8/2018 Start and end dates based on file open and close dates.

Current and Historic Site Configurations

Config Seq: 160

Start Date: 7/19/2014

End Date:

Config Seq: 150

Start Date: 9/23/2011

End Date: 7/19/2014

Config Seq: 140

Start Date: 8/16/2011

End Date: 9/23/2011

Config Seq: 130

Start Date: 9/29/2010

End Date: 8/16/2011

Config Seq: 120

Start Date: 9/1/2009

End Date: 9/29/2010

Config Seq: 110

Start Date: 11/20/2007

End Date: 9/1/2009

Config Seq: 100

Start Date: 10/13/2005

End Date: 11/20/2007

Event Logs