Site Type

Site Name


LWN - Little Wenatchee River

This is a permanent instream PIT tag interrogation site at rkm 4 located at the old fish weir. The site consists of two rows of antennas, with each row spanning the wetted width of the channel during base flows. Each row consists of 3 20-foot PVC antennas, installed in flat-plate configuration onto the old weir decking. The FS1001M transceiver is powered by a solar array and an Outback charge controller. The antennas were built and installed by WDFW. A cellular modem is installed on site to provide remote communication and allow for automated data collection. A submersible pressure transducer and temperature probes are installed on site to monitor environmental conditions.

Operated by:


First year:


Last year:




Site Contacts


Jay Deason
(509) 664-3148 x22


Matthew Stilwater
(509) 664-3148


Photo Gallery

Operational Dates

Year Start Date End Date Notes
2014 3/20/2014 12/12/2014 Antenna 6 down March 20-July 21. Antenna 5 down June 7-July 21. Antenna 2 down March 28-July 22.
2016 3/17/2016 11/14/2016 Antennas 3 and 6 were non-functional until June 27.
2015 3/26/2015 1/1/2016
2017 3/16/2017 12/1/2017 Start and end dates based on timer tags.
2009 6/23/2009 10/26/2009 First year of operation for Little Wenatchee River site. Todd Miller (509.664.3148.x24, is the Data Steward and primary Point-of-Contact. The array was shut down at 11:03 on October 26, 2009 until further notice.
2010 3/15/2010 1/1/2011 No power was available to the site between Nov. 30 and Dec. 23.
2011 1/1/2011 12/31/2011 The Little Wenatchee array ran out of power on 1-22-11 at 10:09:38 due to poor solar conditions. A generator was brought in and left running to recharge batteries at the site. The site began recording on March 11th, 2011 at 19:42 but quickly ran out of power. The site ran and recorded tags between 3-14-11 at 13:43:07 to 3-20-11 at 16:43:57. The site was turned back on 4-7-11 at 08:17:00. Site down from December 24-29 and from December 31 - January 3, 2012 due to power loss.
2012 1/3/2012 11/28/2012 Site down several times during early January due to solar power issue. Site down January 16-March 20 due to solar power issues. Site shut down in late November due to soalar power issues.
2013 3/28/2013 12/4/2013 Batteries replaced and site turned back on March 28. Antenna 6 washed away May 8. Site shut down for winter on December 4.
2018 3/15/2018 11/20/2018 Start and end dates based on timer tags.
2019 3/26/2019 11/14/2019 Start and end dates based on timer tags.

Current and Historic Site Configurations

Config Seq: 100

Start Date: 4/1/2009

End Date:

Event Logs