Site Type

Site Name


STL - Sawtooth Hatchery Adult Trap

This array is located in the ladder of the Sawtooth Hatchery adult fish trap. The array consists of four antennas, a top-water (30x50) and submerged (18x18) antenna on both a down-ladder dam-board and an up-ladder dam-board. All fish migrating up the Salmon River that try to migrate upstream of the satellite facility are forced into the ladder via a removable weir. This weir is a permanent structure with removable panels that is very effective at blocking the upriver movement of fish. Fish have the freedom to move into and out of the ladder at will and are not trapped until they jump a finger weir that is above all array antennas. Adult Chinook salmon that swim past the array and enter the ladder are sorted by origin. Natural origin fish are returned to the Salmon River above the weir while hatchery origin fish are typically ponded and later spawned, recycled through the fishery, or released elsewhere in the basin.

Operated by:


First year:


Last year:




Site Contacts


Matt Belnap
(208) 854-8902


Operational Dates

Year Start Date End Date Notes
2014 6/18/2014 9/10/2014
2016 3/18/2016 10/1/2016 Start and end dates based on timer tags.
2015 3/3/2015 10/16/2016 Start and end dates based on timer tags. Site down April 21 - June 12.
2017 4/3/2017 10/20/2017 Start and end dates based on timer tags.
2010 3/23/2010 9/20/2010 First year of detection activities. Trapping activities were suspended from May 5 until June 22. Detection activities concluded for the year when the ladder was dewatered on Sept. 20.
2011 3/24/2011 9/9/2011 Ladder was dewatered on May 9. Ladder reopened on June 21. Sawtoot Trap closed on September 9 and detection equipment removed on September 15.
2012 3/23/2012 9/14/2012 Site down May 4 - June 21, June 23-27, August 23-24. Operations ceased on September 14.
2013 3/22/2013 9/11/2013
2018 3/26/2018 4/26/2018 Start and end dates based on timer tags.

Current and Historic Site Configurations

Config Seq: 100

Start Date: 12/1/2009

End Date:

Event Logs