Site Type

Site Name


LWE - Lower Wenatchee River

LWE is a permanent instream PIT tag interrogation site at RKM 2.77 on the Wenatchee River. The site consists of two rows of antennas, with each row nearly spanning the wetted width of the channel during base flows. Each row consists of six 20-foot PVC antennas, installed in flat-plate configuration. Each antenna is powered by a Biomark IS1001 (ACN) and the ACNs are connected to a Biomark IS1001-MC (MTS). The antennas were built and installed by WDFW. The site is powered by a thermoelectric generator. LWE has remote communication abilities provided by a cellular modem and Campbell Scientific CR1000 datalogger. A submersible pressure transducer and temperature probe sensors are also installed to provide environmental condition data collection.

Operated by:


First year:


Last year:




Site Contacts


Kevin Peterson
(208) 275-0011


Jay Deason
(509) 664-3148 x22


Photo Gallery

Operational Dates

Year Start Date End Date Notes
2014 1/1/2014 1/1/2015 Antennas 09 and 0B doen August 24-29. Site down intermittently September 20-23.
2015 1/1/2015 1/1/2016
2010 12/7/2010 12/29/2010 First year of operation. The lower Wenatchee River site began operating, with one transceiver array, on Dec. 7, 2010. The site was out of service between Dec. 15-29, and again between Dec. 29, 2010 and Jan. 5, 2011.
2011 1/5/2011 1/1/2012 Site operations were restored on January 5. A second array (C0) was installed on January 12 below the existing B0 array. Both arrays were removed from operation at 0830 on January 17; xceiver C0 was returned to operation on January 19 and xceiver B0 was returned to operation on February 2. A buffer error caused a loss of all data from transceiver B0 between April 5-8. A buffer error caused a loss of all data from transceiver C0 between May 5-7. Arrays were removed from May 13-May 17. Data from array C0 was lost for September 9-13. Three antennas were replaced and all antennas in both arrays are functioning as of November 3.
2012 1/1/2012 1/1/2013 Multiple periods where data was lost due to buffer overruns. See 2012 event log archive for details.
2013 1/1/2013 1/1/2014 Multiple periods where data was lost due to buffer overruns. See 2013 event log and archive for details.

Current and Historic Site Configurations

Config Seq: 120

Start Date: 11/1/2013

End Date:

Config Seq: 110

Start Date: 1/12/2011

End Date: 11/1/2013

Config Seq: 100

Start Date: 10/1/2009

End Date: 1/12/2011

Event Logs