Tidewater Barge Lines is the largest inland marine transportation company west of the Mississippi River. We provide connections for truck, rail and waterborne freight throughout the Pacific Northwest and beyond. Headquartered in Vancouver, Washington, our operating area spans 465 miles on the Columbia and Snake River systems extending from the Port of Astoria, Oregon on the Pacific Coast to the inland Port of Lewiston, Idaho. With the addition of West Coast Marine to Tidewater, we now also offer a comprehensive range of onshore and offshore cleaning and waste transportation services to the marine and industrial business markets. West Coast Marine‘s services include ship cargo hold cleaning, industrial cleaning, hazardous and non-hazardous waste transportation, wet/dry vacuum services, and tank cleaning, throughout Washington, Oregon, Idaho, and parts of California.