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Interrogation Site Metadata

HLX - Hemlock Dam Fish Ladder Exp.

Status:   Decommissioned
Site Type: Instream Remote Detection System  |  Organization: U.S. Geological Survey
General Operational Period:
Start Date: 7/12/2004 12:00 AM
End Date: 7/1/2009 2:00 PM

This experimental interrogation system was located in the adult fish passage ladder at Hemlock Dam, on Trout Creek in the Wind River (WA) Basin.


Data Steward:

Ian Jezorek


Coordinates: 45.802154, -121.932144  |  River Km: 251.017.002

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
2009 1/1/2009 12:00 AM 7/1/2009 2:00 PM The fish ladder at Hemlock Dam was dewatered on July 1, 2009 in preparation for the removal of the Dam. At that time the HLX interrogation site recorded its final data and was decommissioned.
2008 1/1/2008 12:00 AM 1/1/2009 12:00 AM Antenna #22 was lost at the end of 2007, so the site is operating with antenna #15 only.
2007 1/1/2007 12:00 AM 1/1/2008 12:00 AM At about 11:30 AM on 12/3/07 the two transceivers at HLX were shut down and relocated due to flooding. The site resumed operations on Dec. 5, with antenna #15 only.
2006 1/1/2006 12:00 AM 1/1/2007 12:00 AM Data collection was interrupted due to high water between Dec. 29, 2005, and Jan. 3, 2006, and again between Jan. 10 and Jan. 20.
2005 1/1/2005 12:00 AM 1/1/2006 12:00 AM
2004 7/12/2004 12:00 AM 1/1/2005 12:00 AM First year of operation. Start date provided by Ian Jezorek.


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:  7/12/2004
End Date:  7/1/2009

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

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Event Log Summary

Event Date Event Type Comments

Archived Event Logs