Washington County, Oregon AGGREGRATE Washington County, Oregon AGGREGRATE Search | Advanced Search | New Members | Coupons and Discounts | All Categories Sort alphabetically by... Name City Knife River Corporation – Northwest _ 21880 SW Farmington Rd.Beaverton, OR 97007 5470(503) 944-3500 Learn More | Visit Site | Show on Map CalPortland Company _ 703 Broadway StVancouver, WA 98660 (503) 535-7771 Learn More | Visit Site | Show on Map If your business isn't here, contact us today to get listed!