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Interrogation Site Metadata

STL - Sawtooth Hatchery Adult Trap

Status:   Decommissioned
Site Type: Hatchery Returns  |  Organization: Idaho Dept. of Fish and Game
General Operational Period: Seasonally
Start Date: 3/23/2010 12:00 AM
End Date: 7/11/2018 12:00 AM

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. Site is no longer active.


Data Steward:

Matt Belnap


Coordinates: 44.153369, -114.883772  |  River Km: 522.303.617.000

Operational History

Operational history describes the period the site was interrogating for PIT tags. The comments provide anecdotal information about the operation of the site during this period. Site operational periods are updated typically at the end of the calendar year.

Year Start Date End Date Comments
2018 3/26/2018 12:00 AM 7/11/2018 12:00 AM Start and end dates based on timer tags.
2017 4/3/2017 12:00 AM 10/20/2017 12:00 AM Start and end dates based on timer tags.
2016 3/18/2016 12:00 AM 10/1/2016 12:00 AM Start and end dates based on timer tags.
2015 3/3/2015 12:00 AM 10/16/2016 12:00 AM Start and end dates based on timer tags. Site down April 21 - June 12.
2014 6/18/2014 12:00 AM 9/10/2014 12:00 AM
2013 3/22/2013 1:00 PM 9/11/2013 1:00 PM
2012 3/23/2012 2:00 AM 9/14/2012 8:00 AM Site down May 4 - June 21, June 23-27, August 23-24. Operations ceased on September 14.
2011 3/24/2011 12:00 PM 9/9/2011 7:00 AM Ladder was dewatered on May 9. Ladder reopened on June 21. Sawtoot Trap closed on September 9 and detection equipment removed on September 15.
2010 3/23/2010 12:00 AM 9/20/2010 10:15 AM 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.


Configuration metadata includes details about the equipment used at the site to detect and record PIT tags. A new configuration sequence record is created when equipment is added or removed from the site and the period of time it was active. A configuration sequence without an End Date is currently active.

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Start Date:  12/1/2009
End Date:  8/5/2018

Equipment History

Select a type to view the history of equipment installed at this site. A missing End Date implies the information about the equipment is current.

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Equipment Code Description Start Date End Date

No Photos

Event Log Summary

Event Date Event Type Comments
4/3/2017 1:00:00 PM SiteUp As of 4/3/2017 at 13:00 the STL array is interrogating tags.
9/16/2016 12:20:00 PM SiteDown On 9/16/2016 the STL interrogation site was shut down due to the end of the Chinook trapping season
3/18/2016 12:35:00 PM SiteUp As of 12:35 pm on 3/18/2016 STL is interrogating tags.
6/12/2015 9:00:00 AM SiteUp STL is interrogating tags as of 6/12/2015 at 9:00 am
4/21/2015 8:00:00 AM SiteDown As of 4/21/2015 at 08:00 the STL site has been shut down and is not interrogating tags.
3/3/2015 2:00:00 PM SiteUp As of 3/3/2015 at 14:00 the STL site is running and is interrogating tags.
9/10/2014 4:00:00 PM SiteDown As of 9/10/2014 at 4:00 PM the STL site has been shut down.
6/18/2014 1:00:00 PM SiteUp The STL interrogation site was installed and as of 1300 hours on 6/18/2014, is interrogating tags.
3/20/2014 11:30:00 AM General The STL interrogation site was installed and as of 1130 hours on 3/20/2014, is interrogating tags

Archived Event Logs