Site Type

Site Name


UM2 - Umatilla River Instream Array

In-stream detectors on the mainstem Umatilla River upstream of Imeques Acc. Pond.

Operated by:


First year:


Last year:




Site Contacts


Will Simpson
(360) 604-2500


Operational Dates

Year Start Date End Date Notes
2007 8/2/2007 1/1/2008 First year of operation. No data from Oct. 24 - Nov. 8 due to a mad CPU board on the MUX.
2008 1/1/2008 1/1/2009 Some time prior to March 12 antenna #4 stopped working and antenna #6 washed out. Sometime prior to April 22, antennas #3 and #5 were unplugged. As of April 22, only antenna #2 was active. The entire site was washed out on May 6, and data collection activities were suspended. Antennas 2-5 were re-installed on Sept. 16. The MUX malfunctioned between Nov. 9-18; no data were collected during this interval.
2009 1/1/2009 1/1/2010 The site's power source blew a fuse on 7/16/09 and was down for a few weeks till it could be repaired. When the MUX was turned back on the CPU board blew and any data collected since reinstallation were lost. Data collection was restored on 09/09/09.
2010 1/1/2010 8/10/2010 The UM2 site was decomissioned on August 10, 2010.

Current and Historic Site Configurations

Config Seq: 100

Start Date: 8/1/2007

End Date: 8/11/2010