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Project overview map. View larger image (440kb PDF) We will pave both directions of SR 18 between Highway 99 and Weyerhaeuser Way. We will smooth out the pavement on SR 18 where the highway bridges the Interurban Trail and the railroad tracks. The SR 18 Green River (Neely) bridge is located on SR 18 just northeast of SE Auburn-Black Diamond Road near the Neely Mansion. There are two parallel bridges at this location. Work will be done on the eastbound lanes only.