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Interrogation Site Metadata

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LMA - Lower Monumental Adult Ladders

Status:   Active - Operations Unspecified
Site Type: Adult Fishway  |  Organization: Pacific States Marine Fisheries Commission
General Operational Period: Year Round
Start Date: 1/27/2014 12:00 AM

This site monitors both fish ladders at Lower Monumental Dam. Two antennas are installed upstream and downstream of each counting window in each ladder.

Current Operations

Last File Loaded: LMA-2021-298-X-003.json
Date Last File Loaded: 11/15/2021 3:50 PM
Date Last File Opened: 10/25/2021 2:00 AM
Date Last File Closed: 10/25/2021 3:00 AM
Last Observation Tag:
Last Observation Date:
Detection Summary: Last Day's Observations


Primary Contact:

Don Warf

Data Steward:

Nicole Tancreto


Coordinates: 46.562564, -118.538249  |  River Km: 522.067

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
2020 1/1/2020 12:00 AM 1/1/2021 12:00 AM Left ladder was dewatered February 5-26. Right ladder was dewatered January 6-30.
2019 1/1/2019 12:00 AM 1/1/2020 12:00 AM Right ladder dewatered January 2-22. Left ladder dewatered January 23-February 28.
2018 1/1/2018 12:00 AM 1/1/2019 12:00 AM Right ladder was dewatered from Jan 5 - Feb 1. Left ladder was dewatered from Feb 1 - 26
2017 1/1/2017 12:00 AM 1/1/2018 12:00 AM Right ladder was dewatered from Jan 4 - Feb 10. Left ladder was dewatered from Feb 12 - 24.
2016 1/1/2016 12:00 AM 1/1/2017 12:00 AM Right ladder dewatered January 6-February 22. Left ladder dewatered February 23-25.
2015 1/1/2015 12:00 AM 1/1/2016 12:00 AM Data lines between transceivers and computers were installed March 12.
2014 1/27/2014 12:00 AM 1/1/2015 12:00 AM Data lines between transceivers and computers were not installed this year. All data was collected to transceiver buffers, downloaded periodically, then uploaded manually to PTAGIS.


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:  1/30/2014
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
1/20/2022 12:57:46 PM ErrorsCleared Noted.
1/20/2022 11:40:34 AM SiteDown

The site personnel provided the information on the South ladder being de-watered on 1-3-2022.

1/20/2022 10:36:00 AM General

Replaced UPS for transceiver 03. Verified comms.


1/20/2022 8:11:21 AM ErrorsCleared Probable UPS failure. To be investigated.
1/11/2022 7:55:22 AM ErrorsCleared The system experienced a couple noise spikes in the past 24 hours, but is otherwise quiet. The readers ability to detect PIT tags and timer tags was not impacted by the noise.
12/20/2021 4:23:28 PM ErrorsCleared Noted.
12/19/2021 7:34:35 AM ErrorsCleared Re-tune transceiver on next visit.
12/18/2021 7:21:19 AM ErrorsCleared Short noise event.
12/9/2021 7:38:07 AM ErrorsCleared Short noise event.
11/26/2021 10:15:44 AM ErrorsCleared
11/18/2021 10:22:03 AM ErrorsCleared Short noise event.
11/9/2021 9:29:11 AM ErrorsCleared
10/27/2021 7:44:33 AM ErrorsCleared Short noise event.
10/26/2021 7:51:40 AM ErrorsCleared Short noise event.
10/25/2021 8:07:05 AM ErrorsCleared Short noise event.
10/25/2021 5:00:00 AM General

Patch file LMA-2021-298-X-003.json was submitted with id 30523100 to fill data gap on 11/15/2021.

10/24/2021 7:31:24 AM ErrorsCleared
10/23/2021 8:59:02 AM ErrorsCleared
10/21/2021 7:35:38 AM ErrorsCleared
10/15/2021 10:00:00 AM General

Examination of secondary data shows that no detections occurred during the 6 minute gap on 10-15-2021.

10/4/2021 8:07:29 AM ErrorsCleared Short noise event.
9/28/2021 10:09:44 AM ErrorsCleared Noted.
9/28/2021 10:09:25 AM ErrorsCleared Noise report indicates a brief noise event , all levels are currently acceptable 
9/27/2021 7:43:55 AM ErrorsCleared
9/23/2021 12:00:00 PM General

Upgraded data collection platform hardware to IPCs and software to M5.

No Archived Event Logs