DESCRIPTION: Douglas County completed an extension of Weaver Road connecting Old Highway 99 with I-5 near Myrtle Creek. The project included a new ±825‑foot long, four-span bridge spanning the Umpqua River and the adjacent flood plain. Driven piles support the abutments and drilled shafts support the interior bents. New embankments and MSE walls up to ±25 feet tall were constructed for the approaches and the realignment of Airport Drive near the west approach. The project also included the reconstruction of a portion of Old Highway 99 and Wecks Road at the new intersection with Weaver Road.
SERVICE: Foundation Engineering completed a phased-geotechnical investigation for the project. The first phase of work included a site reconnaissance, review of available information, and preliminary report to support the development of the Environmental Impact Statement. We subsequently completed exploratory drilling, laboratory testing, analysis, and geotechnical design for the bridge foundations, embankments, pavements, signal poles, and walls. The presence of soft, compressible soil at the west approach and protection of possible buried artifacts near the interior bents were key geotechnical issues.