Site Type

Site Name


OKL - Lower Okanogan Instream Array

OKL is a permanent instream PIT tag interrogation site at RKM 24.9 on the mainstem Okanogan River, upstream of Chiliwist area in Okanogan County. The site consists of two rows of antennas, with each row spanning the wetted width of the channel during base flows. Each row consists of six 20-foot PVC antennas, installed in flat-plate configuration. The antennas were built and installed by WDFW and CCT. The site is powered by a thermoelectric generator. OKL has remote communication abilities provided by a cellular modem and Campbell Scientific CR1000 datalogger system. A submersible pressure transducer and temperature probe sensors are also installed to provide environmental condition data collection.

Operated by:


First year:


Last year:




Site Contacts


Randy Johnson
(509) 422-7454


Photo Gallery

Operational Dates

Year Start Date End Date Notes
2014 1/1/2014 1/1/2015 Several unexplained gaps in data collection during January and March.
2013 10/8/2013 1/1/2014 Site operational dates taken from interrogation file Open/Close times.
2016 2/4/2016 1/1/2017 Start and end dates based on timer tags.
2015 1/1/2015 11/26/2015 Start and end dates based on timer tags.
2017 1/1/2017 1/1/2018 Start and end dates based on timer tags.
2018 1/1/2018 1/1/2019 Start and end dates based on timer tags.

Current and Historic Site Configurations

Config Seq: 100

Start Date: 3/15/2013

End Date:

Event Logs