Site Type

Site Name


SFL - Shipherd Falls Ladder

This site is located at Shipherd Falls adult fish ladder, on the Wind River near Carson, WA. The PIT tag interrogation antennas are installed in series in the second and third slots below the adult fish trap. Antenna F1 is upstream of antenna F2. All fish migrating up the fishway pass through these antennas prior to reaching the adult fish trap. When both the interrogation site and trap are in operation, tagged fish that successfully pass the antennas and enter the trap will therefore be logged as interrogations and recaptures in the trap. When the trap is out of operation (May-early June), the tagged fish will be interrogated only. During the winter, when the trap is in operation but the antennas are not, PIT-tagged fish will be reported as recaptured only.

Operated by:


First year:


Last year:




Site Contacts


Charlie Cochran
(509) 427-7481


Operational Dates

Year Start Date End Date Notes
2009 4/11/2009 10/29/2009 This is the first year of operation for the interrogation in the Shipherd Falls ladder. Downloaded MUX on 7/22: Memory was full and data was overwritten. Data gap from 7/16/09 at 1223 through 7/20/09 at 0744.
2010 4/29/2010 10/31/2010 Recorded start date was derived from first data file. System was removed for the winter on Oct. 31, 2010.

Current and Historic Site Configurations

Config Seq: 110

Start Date: 4/1/2010

End Date: 11/1/2010

Config Seq: 100

Start Date: 4/1/2009

End Date: 4/1/2010