Site Type

Site Name


MJ1 - Middle Fork John Day Array

The Middle Fork John Day Array, owned and operated by the Oregon Department of Fish and Wildlife, is installed on the Middle Fork John Day River, near the current confluence with Mosquito Creek on Malheur National Forest Service Land. The array is powered by solar power and includes a remotely accessible satellite modem for data downloads and control, via land line. The site is operated year round, except when environmental conditions preclude sufficient charging to power system. The system runs six antennas (two arrays with three antennas each) at all times, except when low flows or ice preclude water flow over some antennas. Except at extremely high flows, the entire river bed is monitored by the antenna arrays.

Operated by:


First year:


Last year:




Site Contacts


Kirk Handley
(541) 575-1167


Photo Gallery

Operational Dates

Year Start Date End Date Notes
2014 1/1/2014 1/1/2015 Site down February 6-11. Antenna 4 down July 15-August 6. Antenna 2 down for unknown time period, but fixed on August 6.
2013 11/6/2013 1/1/2014 First year of operations.
2016 1/1/2016 12/2/2016 Start and end dates based on timer tags.
2015 1/1/2015 1/1/2016
2017 2/28/2017 1/1/2018 Start and end dates based on timer tags.
2018 1/1/2018 11/20/2018 Start and end dates based on timer tags.
2019 3/10/2019 4/11/2019 Start and end dates based on timer tags.

Current and Historic Site Configurations

Config Seq: 110

Start Date: 1/24/2014

End Date:

Config Seq: 100

Start Date: 11/6/2013

End Date: 1/24/2014

Event Logs