Century West was hired by the Port to conduct an alternatives analysis for the Port of Portland’s Marine Terminal 4 entrance road and portions of the internal road network to identify the preferred rehabilitation method for the aging roadways. In the analysis, Century West and GeoEngineers considered traditional and porous pavement options for the rehabilitation of the existing pavement sections. Due to poor subgrade soils near the entrance, the preferred surfacing material was Portland Cement Concrete pavement based on initial and life cycle costs. Porous asphalt concrete pavement was identified as the preferred option for the interior roadways where subsurface infiltration rates are significantly higher. The final design included pavement replacement, rail crossing improvements, and landscape swales for stormwater management and disposal.
This project won a 2018 Honor Award from the Oregon Chapter of American Council of Engineering Companies.