Site Type

Site Name


MWC - Maxwell Canal

Maxwell Canal is located at rkm 24 on the Umatilla River. MWC is operated by USFWS for the Bureau of Reclamation.

Operated by:


First year:


Last year:




Site Contacts


Will Simpson
(360) 604-2529


James Archibald
(360) 604-2573


Operational Dates

Year Start Date End Date Notes
2014 3/19/2014 10/22/2014 Water finished draining from Canal October 9. Equipment shut down October 22.
2016 3/24/2016 10/18/2016 Start and end dates based on timer tags.
2015 4/2/2015 10/21/2015 Start and end dates based on timer tags.
2017 5/2/2017 1/1/2018 Start and end dates based on timer tags.
2007 4/8/2007 10/1/2007 First year of operation. Contact USFWS for actual dates of canal operations.
2008 4/16/2008 10/9/2008 Maxwell Canal watered-up on or after April 13, 2008, but PIT tag detection activity did not begin until April 16. The canal was dewatered, and PIT tag detection suspended, for the rest of the year on October 9. Contact for operational details.
2009 4/6/2009 10/15/2009 The interrogation arrays at the canal headgate (A0) and screen (B0) were operational when the canal began diverting water on 4/6/2009. Water discharge at Maxwell canal ceased on October 2nd 2009. Both PIT arrays (near the headgate and diversion screen) at Maxwell were shut down on October 15th 2009.
2010 4/6/2010 10/25/2010 The diversion of water into Maxwell Canal began on the afternoon of 4/5/2010. Detection activity began on April 6. The diversion of water into Maxwell Canal ended on 10/15/2010. The headgate array and screen array at Maxwell Canal ended operations for the year on 10/25/2010.
2011 4/5/2011 10/14/2011 The screen array at Maxwell Canal (coil A1) began operation on the morning of 3/10/2011. The headgate array at Maxwell Canal (coil B1) began operation on the morning of 3/11/2010. Maxwell Canal began diverting water on April 5. Water diversion operations ceased and the canal was drained on October 14. Interrogation site operations ended on October 18.
2012 3/21/2012 10/23/2012 A new antenna was added and operations started on March 21. Diversion into the canal started on April 3. Diversion of the Umatilla River into the canal ended on October 23.
2013 3/27/2013 10/4/2013 Site down intermittently from March 27-April 22 due to vandalism. Site down June 14-17 and May 8-9 due to vandalism.
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: 3/27/2013

End Date:

Config Seq: 110

Start Date: 3/21/2012

End Date: 3/27/2013

Config Seq: 100

Start Date: 3/1/2007

End Date: 3/27/2012

Event Logs