The International Longshore and Warehouse Union said 88 percent of its members voted to ratify a contract running through May 2018.
The union says the contract includes work rule changes and raises.
The grain handlers association called the agreement fair and said it would allow the companies to remain competitive.
The companies operate terminals in Portland, Seattle and Vancouver, Washington. They are Louis Dreyfus Commodities, United Grain and Columbia Grain.
Two years of negotiations, lockouts and occasional violence centered on the companies’ efforts to get management-friendly work rules to match those at other terminals along the Columbia River. The contract was reached after grain inspectors quit crossing picket lines.
More Northwest Headlines
With power still out for tens of thousands, Spokane faces a cold Thanksgiving 9:07 a.m. WWU cancels classes Tuesday over hate speech on social media 7:37 a.m. Fishing at the heart of Lummi Nation Washington Costco pulls chicken salad off shelves due to E. coli Jury finds Umatilla man guilty in Pasco triple-murder case Search for missing hunter in Royal City halted due to weather Tens of thousands still have no electricity in Spokane County Jail for man who beat woman for not getting In-N-Out burgers
Our new comment system is not supported in IE 7. Please upgrade your browser here.