From there, traffic is either switched to the Patriot Woods Railroad, formally known as the Weyerhaeuser Woods Railroad, where it is transported to Weyerhaeuser's Green Mountain Sawmill at Toutle or it is switched to the BNSF/Union Pacific joint main line for movement to either Portland, Oregon, or Seattle.
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Companies using the railroad services are Weyerhaeuser, Georgia-Pacific, NORPAC, Flexible Foam, Equa-Chlor, PPG Industries, Canexus and Solvay Chemicals.
Just north of Kelso, a railroad bridge provides crossing for the Columbia & Cowlitz Railroad.
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