C.I.D does not have a set treatment schedule we will update website accordingly. We will provide as much notice as possible when treatments will occur. 

​

The District applies aquatic herbicides and algaecides to the entire irrigation canal system in accordance with Washington State Department of Ecology, Permit No. WA0991000. The purpose is to minimize aquatic weed growth to maintain unrestricted water flow within the delivery system. Products used will be Cascade (Dipotassium Salt of Endothall), Nautique (Copper Ethylenediamine Complex and Copper Triethanolamine Complex), Captain and Captain XTR (Copper Ethanolamine Complex), Copper Sulfate Crystals (Copper Sulfate Pentahydrate), Green Clean Pro (Sodium Carbonate Peroxyhydrate), Sonar H4C (Fluridone) and Sonar A.S. (Fluridone). Treatments will be between April 15, 2023, and October 15, 2023. The treatment sites will be at various sites along our canal starting at Wanawish Dam, West Richland.  Waters within the Columbia Irrigation District’s delivery system should be used for irrigation purposes only and are not for recreation, human and/or animal consumption. Avoid human contact. All canals within Columbia Irrigation District are restricted to District authorized purposes only and are not intended for public use.  District facilities are posted and located on private property.  All interested parties may contact the Columbia Irrigation District at 10 E Kennewick Avenue, Kennewick, WA 99336, 509/586-6118 during the hours of 7:30 a.m. – 4:00 p.m. to view maps of the District’s canal system or contact the Department of Ecology, Yakima Regional Office, 15 W Yakima Avenue, Yakima, WA 98902-3401, 509/575-2807.