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Interrogation Site Metadata

WW2 - SF Walla Walla at Bear Creek

Status:   Decommissioned
Site Type: Instream Remote Detection System  |  Organization: U.S. Fish and Wildlife Service
General Operational Period: Year Round
Start Date: 10/16/2002 2:40 PM
End Date: 8/6/2019 12:00 AM

The WW2 PIT interrogation site is located on the South Fork Walla Walla River approximately 21 kilometers upstream from the confluence with the North Fork Walla Walla River. The site consists of two pass over HDPE antennas that overlap to cover the full wetted width of the river immediately upstream from the Bear Creek confluence. A IS1001 Master Controller and two IS1001 nodes are powered by a thermoelectric generator. Site is no longer active.


Data Steward:

Brian Davis


Coordinates: 45.844170, -118.104691  |  River Km: 509.081.021

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
2019 1/1/2019 12:00 AM 8/6/2019 12:00 AM Start and end dates based on timer tags.
2018 1/25/2018 12:00 AM 12/31/2018 12:00 AM Start and End dates based on timer tags.
2017 1/1/2017 12:00 AM 1/1/2018 12:00 AM Site up and down multiple times during the year, check event logs for details.
2016 1/13/2016 12:00 AM 1/1/2017 12:00 AM Site up and down multiple times during the year, check event logs for details.
2015 1/1/2015 12:00 AM 11/21/2015 12:00 AM
2014 1/1/2014 12:00 AM 1/1/2015 12:00 AM Site down April 20 -24, June 3-4, October 9-13, November 20-25.
2013 1/1/2013 12:00 AM 1/1/2014 12:00 AM Site down April 12 - August 1. Only Antenna 2 in operation after August 1. Site down September 10-14, October 16-24, November 26-28.
2012 1/1/2012 12:00 AM 1/1/2013 12:00 AM
2011 1/1/2011 12:00 AM 1/1/2012 12:00 AM Data collection was suspended on Jan. 16 due to high flows, and did not resume until September 28.
2010 1/1/2010 12:00 AM 1/1/2011 12:00 AM No data were collected between Oct. 30 and Nov. 4 due to a power outage.
2009 1/1/2009 12:00 AM 1/1/2010 12:00 AM The site experienced frequent and extended power outages between March 23 and April 7. Antenna #2 blew out on April 13. Between July 4-8 the site operated only during the day, when the solar panels could work. The MUX failed on July 9 and was not replaced until July 30.
2008 1/1/2008 12:00 AM 1/1/2009 12:00 AM No data were collected between 10mar08 and 12mar08 or 15apr08 and 18apr08 due to power outages. Antenna 01 was washed out on May 14, and antenna 02 was washed out on May 16. Both antennas were reinstalled on August 26. The MUX was OOS between 11/29/08 22:20 and 12/02/08 13:00 because the propane tank ran dry; no detection data were collected during this interval.
2007 1/1/2007 12:00 AM 1/1/2008 12:00 AM Although data files were submitted, the MUX was not working between Jan. 18 and Feb. 11, so no detection data were collected during this interval. No data were collected between 11:40 am on 9/15/07 and 6:44 am on 9/19/07.
2006 1/1/2006 12:00 AM 1/1/2007 12:00 AM The site was down from 1/4/06 at 12:00 to 1/19/06 at 12:15; site ran out of propane. 03/08/2006 at 13:40 to 03/17/2006 at 16:57 - Site down because propane ran out. 04/25/2006 at 09:00 and 04/26/2006 12:57 - Site down because propane ran out.
2005 1/1/2005 12:00 AM 1/1/2006 12:00 AM The site was down from 9/1/05 at 14:23 to 11/18/05 at 13:42. Propane could not be refilled because of site inaccessibility as result of trail closures due to a forest fire.
2004 1/1/2004 12:00 AM 1/1/2005 12:00 AM Interrogation was interrupted between 1/22/04 14:00 and 1/25/04 16:00 for computer repairs. No data are available between 2/09/04 20:00 and 2/12/04 18:07. No data are available between 3/23/04 12:00 and 3/25/04 17:43. Computer files were generated, but no transceiver data were collected between 7/11/04 4:52 and 7/19/04 20:00.
2003 1/1/2003 12:00 AM 1/1/2004 12:00 AM
2002 10/16/2002 2:40 PM 1/1/2003 12:00 AM First year of operation. No data received after 12/4/02.


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.

Select Configuration Number:
Start Date:  10/28/2015
End Date:  2/5/2020

Site Configuration Diagrams:

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.

Select Equipment Type:
Equipment Code Description Start Date End Date


Event Log Summary

This displays the last 25 events, to see the full history, log in to the Dashboard and go to Interrogation Site > Event Logs.

Event Date Event Type Comments
1/1/2021 2:23:00 PM General Due to a flooding event that occurred in early February 2020, transceiver and other equipment were washed away and never recovered. There are no current plans to reestablish this site. All available data are uploaded unless a transceiver is recovered and more data can be extracted.
12/31/2019 12:37:00 PM General Not all data have been uploaded from 2019 yet. Will have to wait for weather and/or schedule until site visit.
1/1/2019 1:28:00 PM General Due to lack of government funding and winter weather, not all 2018 are submitted at this time. All current data will be uploaded after next site visit.
12/18/2018 1:28:00 PM General Site visit with mechanic to troubleshoot thermoelectric generator. The generator was properly tuned and powering the site properly when we departed.
10/24/2018 1:28:00 PM General Site visit occurred on 10/24/2018. Identified that transceiver had been switching back and forth. Tried to fix power source and failed. Site essentially down till next visit.
7/17/2018 1:28:00 PM General Site was up and running from 06/25/18 to 07/17/18. Unfortunately on 07/17/18 the transceiver once again started jumping between scan and standby mode. Site continued to run in this poor state till 10/01/18 when site went down.
4/5/2018 1:28:00 PM General Site visit 04/05/18 occurred and transceiver was turned back on again. Site ran intermittently until shutting off again on 04/24/2018.
1/25/2018 1:28:00 PM General Looking back at 2017 data it appears that the transceiver started alternating between scan and standby mode on 11/20/17 until eventually shutting off on 11/21/17. The Transceiver was turned back on 01/25/18, but the problem persisted and only ran for a few hours.
12/31/2017 11:00:00 PM General WW217365.ALL has all remaining 2017 data. After the submission of this file, all data for 2017 will be accounted for. All down time has been submitted and accounted for 2017.
11/20/2017 8:33:00 AM SiteDown TEG power started fluctuating, reader input voltage low; reader switching between scan and standby. Data not being collected.
8/1/2017 8:33:00 AM SiteUp Propane filled, site restarted. Files downloaded.
7/12/2017 5:12:00 PM General Site ran out of propane. Data collection ceased.
5/31/2017 2:38:00 PM SiteUp Propane swapped, power restored.
4/24/2017 2:00:00 PM SiteDown Site ran out of propane.
2/2/2017 11:08:00 AM SiteUp Power restored.
2/2/2017 11:08:00 AM SiteUp Site up and running.
1/6/2017 2:10:00 AM SiteDown TEG power started fluctuating on 1/5 @ 22:25 and MC eventually went into standby mode. NO DATA COLLECTED.
1/6/2017 2:10:00 AM SiteDown TEG power started to fluctuate, possibly due to extreme cold temperatures. MC went into standby mode. No data collected.
11/1/2016 11:11:00 AM SiteUp Site up and running.
10/31/2016 10:11:00 PM SiteDown Site ran out of propane. No data collected
9/26/2016 11:11:00 AM SiteUp Site back up.
9/22/2016 10:19:00 PM SiteDown Site ran out of propane. No data collected.
7/26/2016 6:00:00 PM SiteUp Site back up and collecting data.
7/26/2016 8:30:00 AM SiteDown Site down to swap empty propane tanks.
7/22/2016 12:00:00 PM SiteUp Site back up, collecting data.