This project designed a structure to recover Dungeness River floodplain. The new structure replaces an impactful 585-foot long RR Trestle that crossed the floodplain at River Mile 5.8 near Sequim. The RR Trestle supported the Olympic Discovery Trail. It was built on 16-foot piling bent centers, and the 16-foot openings restricted floodplain processes and constrained the river channel to a single location (the 150-foot bridge opening) for more than 60 years. Upstream of the trestle the river meanders significantly, but meanders have been unable to move through the trestle, causing channel instability and harm to salmon habitat. Negatively impacted species include 4 ESA-listed salmon and char: Puget Sound Chinook and steelhead, Eastern Strait of Juan de Fuca summer chum and bull trout, along with fall chum, Coho, and pink salmon. Flooding in February 2015 swept away one of the trestle's piling bents, allowing the river to avulse, and the main river channel now runs beneath the trestle. With the trestle damaged and the Olympic Discovery Trail impassible, the time is right to replace the habitat-unfriendly creosoted industrial grade infrastructure with a clean, salmon-friendly bridge. With trestle replacement, floodplain functions and salmon habitat forming processes will be restored to approximately 15.5 acres of floodplain along 2,000 feet of mainstem river and multiple side channels