Site Type

Site Name


ICL - Lower Icicle Instream Array

ICL is a permanent instream PIT tag interrogation site at RKM 0.4 on Icicle Creek. 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 six (three 20-foot and three 15-foot) PVC antennas, installed in flat-plate configuration. Each antenna is powered by a Biomark IS1001 (ACN) and the ACNs were connected to a QST QuBE ACN controller until August 2019 when the QuBE was replaced with a Biomark IS1001 master controller. The antennas were built and installed by WDFW. The site is connected to grid power to charge the battery bank powering the detection system. A cellular modem is installed on site to provide remote communication and allow for automated data collection. A submersible pressure transducer and temperature probes were installed on site until August 2019 when they were removed.

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 1/1/2014 1/1/2015
2015 1/1/2015 1/1/2016
2016 1/1/2016 1/1/2017 Start and end dates based on file open and close dates.
2017 1/1/2017 1/1/2018 Start and end dates based on file open and close dates.
2011 9/8/2011 1/1/2012 First year of operations. Site lost power, causing data loss from October 12-24; October 25-19; November 21-29; and December 10-21.
2012 1/1/2012 1/1/2013
2013 1/1/2013 1/1/2014
2018 1/1/2018 10/30/2018 Start and end dates based on file open and close dates. File gap June 27 - October 1.
2019 8/8/2019 12/31/2019 Start and end dates based on timer tags.

Current and Historic Site Configurations

Config Seq: 110

Start Date: 10/15/2014

End Date:

Config Seq: 100

Start Date: 9/8/2011

End Date: 10/15/2014

Event Logs