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

Tuesday                September 13              Boardman Canal (siphon to end)

Wednesday           September 14           Upper Canal (Phase 1 Inlet (East of Power Line Road) to Division)

Thursday               September 15            Middle Canal (Division to I-84)

Treatments will start at approximately 8 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.

The Relocation Canal will be treated with Copper Sulfate Crystals on Wednesday, September 14.  There will be a holding time of 7 hours.  The Division Street Pump Station will be down during the treatment, then turned back on Thursday, 9/15..

Please call the office with any questions AT 541-922-3814.