Category Archives: Activities & Projects


The Board of Directors of West Extension Irrigation District will hold its Monthly Business Meeting on Thursday, March 19, 2020 at 9:00 am. An Executive Session may be called pursuant to ORS 192.660 to discuss legal issues. The meeting will be at the Irrigon Fire Department at 705 NE. Main Street, Irrigon.

Please call the office at (541) 922-3814 if you have any questions.



West Extension Irrigation District will be applying the aquatic herbicide “Argos” (chelated copper) in its main canal in 3 treatments:

  1. Upper Canal (Phase 1 Inlet to Division) – Wednesday July 17
  2. Middle Canal (Division to I-84) – FRIDAY JULY 19
  3. Boardman Canal (Siphon to end) – THURSDAY JULY 18

Treatments will start at approximately 7 am and last for 6 hours.

Argos targets algae and is applied at the rate of 1 ppm for a 6 hour set.  This low rate of application means there are no holding restrictions on the water.  This compares to the Copper Sulfate Crystals which are applied at a 5-6 ppm rate and have lengthy holding time.

Please call the office if you have any questions at 541-922-3814.

Canal Treatment Scheduled

West Extension Irrigation District will be applying the aquatic herbicide Cascade with active ingredient Dipotassium salt of Endothall  to its Main Canal on Tuesday, June 19, 2019.  The canal will be presumed to have treated water for 24 hours.

It is labeled safe for all uses EXCEPT:  NEWLY PLANTED ANNUALS, ORNAMENTALS, GRASS, and SOD.  It is also likely to be harmful to fish in ponds (contained areas).

If you require further information, please contact the district office at 541-922-3814.