Site Type

Site Name


OMK - Omak Creek Instream Array

OMK is a permanent PIT tag interrogation system in Omak Creek. Omak Creek enters the Okanogan River at RKM 51.5, approximately 1 km upstream from the city of Omak, WA. OMK is located 0.24 km from the confluence with the Okanogan River. In February 2011, the site consisted of 6 pass-over PVC antennas, in two separate rows. In January 2018, the instream array was reconfigured with four 10 foot HDPE antennas anchored to the stream bed for pass-over detection. Antennas are configured in 2 separate rows that span the wetted width at base flow. Each antenna is power by a Biomark IS1001 reader multiplexed by an IS1001-MC. The site is connected to grid power to charging two battery banks which in turn power the detection system. OMK has remote communication abilities provided by a cellular modem.

Operated by:


First year:


Last year:




Site Contacts


Randy Johnson
(509) 422-7454


Operational Dates

Year Start Date End Date Notes
2014 1/1/2014 1/1/2015
2016 1/1/2016 1/1/2017 Start and end dates based on timer tags.
2015 1/1/2015 1/1/2016 Start and end dates based on timer tags.
2017 1/1/2017 1/1/2018 Start and end dates based on timer tags.
2006 1/1/2006 8/1/2006 First year of operation. Dates are approximate, pending review.
2007 3/8/2007 1/1/2008 The MUX transceiver was accidentally turned off on July 5; power was not restored until September 25.
2008 1/1/2008 8/13/2008 Data collection was suspended sometime between July 30 and August 13, after which the original site was abandoned.
2009 OMK did not report any data to PTAGIS in 2009.
2010 OMK did not report any data to PTAGIS in 2010.
2011 2/4/2011 1/1/2012 Site modified, updated and started collection data again on February 4. Power issues caused multiple non-operational periods starting in June; see event log for details.
2012 1/1/2012 1/1/2013
2013 1/1/2013 1/1/2014
2018 1/1/2018 1/1/2019 Start and end dates based on timer tags.

Current and Historic Site Configurations

Config Seq: 120

Start Date: 1/31/2018

End Date:

Config Seq: 110

Start Date: 2/4/2011

End Date: 1/31/2018

Config Seq: 100

Start Date: 1/1/2006

End Date: 2/4/2011

Event Logs