Site Type

Site Name


MSH - Methow Fish Hatchery Outfall

The interrogation site is installed within the outlet channel of the Washington Department of Fish and Wildlife (WDFW) Methow Hatchery located on the Methow River at Rk 82.3 from the confluence with the Columbia River. The outlet channel is approximately 690 ft. in length with a variable wetted width, between 3ft. to approximately 10ft. All juvenile fish released from Methow Hatchery navigate through the outlet channel to reach the Methow River, and returning adult fish also migrate up the outlet channel and are often collected in a trap structure at the head end of the channel. The detection systems in the channel were installed in series and were initially comprised of three model 2001F-ISO portable PIT tag detection units using 24 X 24 pass-through antennas. The site was operated seasonally (from April to June) in this manner until April 2014 when an additional single antenna was permanently affixed to the trap structure and operated year-round utilizing an IS1001 reader. In August 2015, the temporary antennas were removed and the site has operated with only the single, permanent antenna since that time. The interrogation system monitors juvenile salmonid emigration from the hatchery facility, and detects adult fish approaching or entering the trapping facility.

Operated by:


First year:


Last year:




Site Contacts


Charles Snow
(509) 997-0048


David Grundy
(509) 997-0048


Photo Gallery

Operational Dates

Year Start Date End Date Notes
2014 4/2/2014 1/1/2015
2016 1/6/2016 1/1/2017 Start and end dates based on timer tags.
2015 1/1/2015 12/23/2015 Start and end dates based on timer tags.
2017 1/1/2017 12/5/2017 Start and end dates based on timer tags.
2011 4/19/2011 5/2/2011 All three antennas were removed from the outfall channel from April 25-27 due to high flows.
2012 4/19/2012 6/5/2012
2013 4/15/2013 5/8/2013 Antenna 02 was down during the release.
2018 1/9/2018 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: 110

Start Date: 4/2/2014

End Date:

Config Seq: 100

Start Date: 4/15/2011

End Date: 4/2/2014

Event Logs