Site Type

Site Name


NAL - Lower Nason Creek

This is a permanent instream PIT tag interrogation site at rkm 1 located on lower Nason Creek. The site consists of two rows of antennas, with each row spanning the wetted width of the channel during base flows. Upstream row consists of 1 20-foot, 1 15-foot and 1 10-foot PVC antenna. The downstream row consists of 1 10-foot and 2 20-foot PVC antennas. All antennas are installed in flat-plate configuration. The FS1001M transceiver is powered by grid. 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


Kevin Peterson
(208) 275-0011


Jay Deason
(509) 664-3148 x22


Photo Gallery

Operational Dates

Year Start Date End Date Notes
2014 3/6/2014 1/1/2015 Site down July 20-25.
2016 4/1/2016 1/1/2017 Start and end dates based on timer tags.
2015 1/1/2015 11/17/2015
2017 1/1/2017 1/1/2018 Start and end dates based on timer tags.
2008 4/17/2008 1/1/2009 First year of operation for Lower Nason Creek array.
2009 1/1/2009 1/1/2010 Large ice flow damaged arrays on 1/07/09; there are no detection data available between 1/7/09 and 3/3/09. There are no detection data available between 3/15/09 and 3/26/09. Extremely high stream discharge damaged arrays on 5/27/09; there are no detection data available between 5/27/09 and 7/6/09.
2010 1/1/2010 1/1/2011 No data available between June 8-11 due to loss of power.
2011 1/1/2011 1/1/2012 NAL was out of operation from Jan 31 - Feb 15 due to severe environmental conditions. WDFW assumed responsibility for NAL on 15Feb11.
2012 1/1/2012 1/1/2013
2013 1/1/2013 11/14/2013 No interruptions in operations until site shut down for winter on November 14.
2018 1/1/2018 1/1/2019 Start and end dates based on timer tags.
2019 1/1/2019 12/31/2019 Start and end dates based on timer tags.

Current and Historic Site Configurations

Config Seq: 100

Start Date: 4/1/2008

End Date:

Event Logs