The Walla Walla River Irrigation District was formed for the purpose of delivering irrigation water from the Walla Walla River to landowners residing within the District's boundaries and possessing a valid Oregon water right. The Little Walla Walla River has been the primary conveyance system for the majority of the water delivered by the WWRID since the late 1800s.

The Walla Walla River Irrigation District has a responsibility under Oregon water law (chapter 545) to operate and maintain the ditches within their District boundaries. Ditch maintenance activities include herbicide application, burning and occasionally mechanically cleaning the ditches.

The Umatilla County Weed Department has notified the District of the presence of a noxious weed along the Little Walla Walla River conveyance system. The Yellow Flag Iris (Iris pseudacorus) is an invasive species of iris that thrives along ditch banks. The Yellow Flag Iris can cause gastroenteritis in livestock and humans and can cause skin irritation in humans.

The Walla Walla River Irrigation District is beginning their fall ditch maintenance activities which will include burning and mechanical cleaning through the majority of the Little Walla Walla River system. If you own property next to the Ford, Crockett or Powell branches of the Little Walla Walla River, please clear the District's easement area of any personal property. Also, if the ditch is fenced through your property, please contact the District office at your earliest convenience so that we can make arrangements for accessing our maintenance easement.

If you have questions, or need further informatin, please feel free to contact our District office by calling 541-938-0144.