Site Type

Site Name


LNR - Lower Naches River

This site is a permanent instream PIT tag detection system located at rkm 5.3 on the lower Naches river, 700 meters below Nelson dam. Prior to 10/29/2018, the site consisted of one row of five 28 ft x 3 ft flexible antennas mounted to wooden 2 X 4 backbones and anchored to the riverbed with MR-4 anchors. Due to extreme flow conditions in the Naches river, 3 inch HDPE antennas were constructed by Yakama Nation Fisheries to replace the flexible antennas. An IS1001 MTS was installed to replace the Qube. The 3-wire cable was replaced with CAN bus with a 100 ft trunk line running to ACN #5. All IS1001s are daisy chained together with hydrovolt plugs to allow removal/replacement of individual submersible enclosures and antennas. Five 25 ft x 31 inch HDPE antennas were installed using the existing MR-4 anchors. Additional anchors were installed to secure the IS1001 enclosures that are anchored 8 ft below the row of antennas. The site is powered with a 5060 Thermo-electric generator fueled with portable propane tanks.

Operated by:


First year:


Last year:




Site Contacts


Zack Mays
(509) 899-2422


Chris Frederiksen
(509) 945-5018


Photo Gallery

Operational Dates

Year Start Date End Date Notes
2016 11/5/2016 1/1/2017 Start and end dates based on file open and close dates.
2017 1/1/2017 1/1/2018 Start and end dates based on file open and close dates.
2018 1/1/2018 1/1/2019 Start and end dates based on file open and close dates. Site down May 4 - October 29.
2019 1/1/2019 12/31/2019 Start and end dates based on timer tags.

Current and Historic Site Configurations

Config Seq: 100

Start Date: 11/6/2016

End Date:

Event Logs