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Interrogation Site Metadata

IR4 - Imnaha Weir Downstream Array

Status:   Active - Operational
Site Type: Instream Remote Detection System  |  Organization: Oregon Dept. of Fish and Wildlife
General Operational Period: Year Round
Start Date: 8/18/2016 12:00 AM

The site is located downstream of the Oregon Dept. of Fish and Wildlife (ODFW) fish weir on the Imnaha River. There are six antennas approximately 75-feet downstream of the weir. The antennas are driven by Biomark IS1001s and controlled by a Biomark IS1001-MC. The instream antennas are anchored to the streambed with a through-strut system. The equipment is powered by a Hybrid- TEG (model 5220 and 1kw solar). The readers are connected to the controller via Biomark Data-Over-Power (DOP) cabling. The MC is connected to a satellite modem for remote telemetry. The site is being remotely monitored by Biomark with automatic downloads (and PTAGIS submissions) every four hours. The power supply and remote telemetry are being shared by the three interrogation sites at the weir, IR4, IR5, and IML.

Current Operations

Last File Loaded: IR4-2022-176-P-00C.xml
Date Last File Loaded: 6/25/2022 3:20 PM
Date Last File Opened: 6/25/2022 9:33 AM
Date Last File Closed: 6/25/2022 1:57 PM
Last Observation Tag: 3DD.00779411F5
Last Observation Date: 6/25/2022 1:57 PM
Detection Summary: Last Day's Observations


Primary Contact:

Kyle Meier

Data Steward:

Joseph Feldhaus


Coordinates: 45.194460, -116.868774  |  River Km: 522.308.084

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
2021 4/7/2021 12:00 AM 12/30/2021 12:00 AM Start and end dates based on timer tags.
2020 3/20/2020 12:00 AM 10/24/2020 12:00 AM Start and end dates based on timer tags. See event logs for additional operational information.
2019 3/27/2019 12:00 AM 11/22/2019 12:00 AM Start and end dates based on timer tags.
2018 1/1/2018 12:00 AM 1/1/2019 12:00 AM Start and end dates based on timer tags.
2017 1/1/2017 12:00 AM 1/1/2018 12:00 AM Start and end dates based on timer tags.
2016 8/18/2016 12:00 AM 1/1/2017 12:00 AM


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:  8/18/2016
End Date:  ----

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

No Photos

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
3/28/2022 12:39:00 PM SiteUp

Site turned back on for 2022 season.  Started detecting virtual tags at 12:39 p.m. on March 28, 2022.

11/15/2021 12:36:00 PM General

To conserve power at the site, Antennas 4, 5, and 6 were turned off on on Nov 15, 2021.  Antennas 1, 2, and 3 remain operational.  Antennas 4-6 will be turned back on in March/April 2022.

6/9/2021 10:20:00 AM General Antennas 4-6 were turned back on at approximately 10:20 a.m.
4/12/2021 11:30:00 AM General Antennas 4, 5, and 6 were purposefully turned off to prevent data overages of the satellite data plan during the forced and volitional smolt release which consists of almost 20,000 PIT tags. Antennas 1-3 are fully functional as well as both antennas at IML. Antennas 4-6 will be turned back on in a few weeks.
4/7/2021 11:35:00 AM SiteUp Site powered up for 2021. All antennas appeared to be working and tuned.
10/23/2020 10:42:00 AM SiteDown Shut the site down for the winter.
7/22/2020 3:21:43 PM General Removed a PIT Tag that was stuck on IR4 antenna 3. Site was up and running when we left.
6/16/2020 8:20:00 AM General Satellite SIM Card swapped, site visit.
3/20/2020 11:50:00 AM SiteUp Turned on the master controller to operate IR4/IML. Antennas A1-A3 are operational. Antennas A4-A6 are currently off and will remain off until May or June 2020. Antennas A7 & A8 (i.e, IML) are functioning. The site is running entirely on solar power.
11/22/2019 2:43:00 PM SiteDown We turned the Master Controller off on 11/22/2019. Anticipate turning the equipment back on in late March/early April 2020.
9/5/2019 3:50:00 PM General Antennas 4, 5, and 6 were manually turned off for the season to save power. The antennas will be restarted in the spring.
5/14/2019 5:00:00 PM General Turned on antennas A4, A5, and A6 at about 5:00 p.m. Pacific Daylight Savings time. Adjusted solar panel to summer mode.
3/27/2019 4:45:31 PM SiteUp Replaced batteries. Site is currently running on solar power. Only the upstream row of antennas are operating. The bottom row of antennas were left off. Site was operating at about 13:30 pacific time. Updated firmware on the MC to Application v1.6.4.S19 and CBG Firmware v1.6.5.
3/18/2019 8:55:00 AM SiteDown The site lost power on 11/30/18. Site visit on 3/18/2019 confirmed that the site is without power.
11/27/2018 11:30:00 AM General Replaced the Satellite modem that uploads data for IR4/IR5/IML and re-established remote communication.
10/23/2018 1:00:00 PM SiteUp IR4 is running with the three antennas (A1, A2, A3) that comprise the upstream node. While we were able to isolate the power problem at IR4/IR5, the site is not able to produce enough power to run IR4 and IR5 concurrently with all of the antennas in operation. To help reduce power consumption, we installed a breaker that allowed us to turn off the downstream antenna nodes (A4, A5, A6). These three antennas will remain off until March 2019. The site is currently on solar power. The TEG is broken.
10/11/2018 12:30:00 PM SiteDown The site was turned off @ 12:30 p.m. The site is continuing to experience power problems. Since IR4 and IR5 use the same power source, IR4 was turned off in an effort to keep IR5 operating by reducing power consumption.
10/9/2018 1:30:00 PM General Site was down from about 1:30 p.m. to 2:15 p.m. to conduct voltage testing of the TEG and Solar panels. The voltage to the Master Controller has been inconsistent for the last week. Adjusted the solar panels from "summer mode" to winter mode.
7/28/2018 7:30:00 AM General Power outage from 7/28/18 @ 7:30 am until 7/31/18 @ 8:00 am.
6/26/2018 8:30:00 AM General The site was down sporadically from about out 8:30 a.m. to about 12:30 p.m. to make upgrades to IML. The same master controller operates IML and IR4.
4/24/2018 10:30:00 AM SiteUp The master controller (MC2) for IR4 was turned back on. Replaced a breaker switch that controlled the solar panel. Updated firmware. Propane tank at 60%.
4/16/2018 10:00:00 AM SiteDown IR4 is down. The data plan was exceeded so real time remote monitoring is on hold until further notice. On 4/16/18, we replaced the solar charge controller. This did not solve the problem where the breaker switch for the solar panels keeps getting tripped. We were able to utilize the solar panels if the thermal electric generator (TEG) was turned off. Since the smolt releases from the acclimation facility are done for 2018, we turned off master controller 2 (MC2) which runs (IR4 and IML) and turned on MC1 (IR5). IR5 should be collecting data as of 4/16/18 at 12:30 p.m. IR5 is only running on solar power.
4/10/2018 8:09:00 AM General A site visit on 4/10/18 revealed that the hybrid power system is tripping the breaker switch that controls power input from the solar panels. The thermal electric generator (TEG) is proving some power to charge the batteries. Without the solar panels, the site is not able to maintain adequate power to run all three sites simultaneously. Master controller 1, which runs IR5 was turned off to conserve power in the hopes that we could maintain some data collection from IR4 and IML to monitor the Chnook smolt releases.
4/8/2018 8:09:00 AM General Voltage problems at IR4, IR5 and IML continued to deteriorate. Sites are intermittently turning on and off.
4/3/2018 8:09:00 AM General Observed a voltage drop that began on 4/3/2018 that affected these three sites: IR4, IR5, IML. All three sites are run off the same power supply. The drop in voltage resulted in some antennas intermittently loosing power at all three sties.

No Archived Event Logs