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Interrogation Site Metadata

PEL - Pelton Dam Ladder - Deschutes

Status:   Active - Operational
Site Type: Monitored Fish Release  |  Organization: Oregon Dept. of Fish and Wildlife
General Operational Period: Year Round
Start Date: 3/30/2016 1:00 PM

The ladder at PGE's Pelton Dam on the Deschutes River (rkm 328.161) is used as a rearing pond for spring Chinook salmon, and as a trapping facility for returning adults. This interrogation site monitors the volitional release from the ladder as well as the weirs downstream of the trap for adult trap collection of broodstock and trap-and-haul operations. It consists of two antennas located on adjacent weirs in the lower part of the ladder (for juvenile/smolt detections), and two antennas on a ladder-weir that monitor adult returns. Each antenna is a custom built loop that monitors passage at the concrete weir. The antennas for juvenile detection cover 100% of the flow as there is no flow over the top of the weir. In addition, the antennas downstream of the trap also cover 100% of the flow on one weir. The transceiver at the site is a IS-1001-MC that is networked to individual IS-1001s located near each weir. The site is operated on grid power with automated downloads daily. Typical times of operation for the juvenile antennas (Antennas 1 and 2) are from April 1 to May 30th. While the adult ladder antennas (Antennas 3 and 4) operate year-round.

Current Operations

Last File Loaded: PEL-2023-149-P-004.json
Date Last File Loaded: 5/29/2023 4:08 AM
Date Last File Opened: 5/29/2023 2:00 AM
Date Last File Closed: 5/29/2023 3:00 AM
Last Observation Tag: 725
Last Observation Date: 5/29/2023 2:43 AM
Detection Summary: Last Day's Observations


Primary Contact:

Ryan Moon

Data Steward:

Derrek Faber


Coordinates: 44.725865, -121.247167  |  River Km: 328.161

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
2022 1/1/2022 12:00 AM 1/1/2023 12:00 AM Start and end dates based on timer tags.
2021 1/1/2021 12:00 AM 6/15/2021 12:00 AM Start and end dates based on timer tags.
2020 4/10/2020 12:00 AM 5/23/2020 12:00 AM Start and end dates based on timer tags. See event logs for additional operational information.
2019 3/25/2019 12:00 AM 5/29/2019 12:00 AM Start and end dates based on timer tags.
2018 4/5/2018 12:00 AM 5/20/2018 12:00 AM Start and end dates based on timer tags.
2017 No data received in 2017.
2016 3/30/2016 1:00 PM 5/9/2016 1:00 PM


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:  6/15/2021
End Date:  ----

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.

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Equipment Code Description Start Date End Date


Event Log Summary

Event Date Event Type Comments
11/29/2021 12:00:00 AM SiteUp

Moved ChS back down to ladder cells. 

5/24/2021 12:00:00 AM SiteDown

All fish were released in April. Ladder cells were dewatered this day

1/1/2021 12:00:00 AM SiteUp
5/9/2016 1:00:00 PM SiteDown Receiver turned off and removed, site no longer active in 2016
3/30/2016 1:00:00 PM SiteUp Receiver installed, site active

No Archived Event Logs