College of Engineering Unit:
The city of Silverton, Oregon desires to widen and rehabilitate McClaine St., a minor arterial road that connects the historic downtown with a commercial district on the west side of the city. The project area is the portion of road between the intersection of McClaine St. and Trix St. at the northwest corner and the intersection of McClaine St. and W Main St. at the southeast corner. This section of McClaine St. has severe deterioration, an inadequate sanitary sewer system, and no stormwater management system. McClaine St. currently has no designated route for bicyclists. The intersection of McClaine St. and Main St. has no turn lanes coming from McClaine St. and experiences congestion. The City of Silverton’s goals for the project are to improve the overall quality of life for residents who live on and travel through this section of McClaine St. The road needs to meet future demands of the growing city population. The project team’s design objectives are pedestrian, bike, and vehicle safety and usability; effective low impact stormwater management; and efficient, safe intersections. The team is composed of three transportation engineers that focus on roadway design, pathway design, and design of the intersection signalization. Two water resource engineers design the stormwater management system.
The final design of the project includes the realignment of McClaine St. with 10-foot travel lanes. Traffic calming measures are used along the street to improve safety of the route. A signalized intersection with a dual mast arm for McClaine’s intersection with Main Street is added to improve the efficiency of the intersection. The addition of structural infiltration basins and a storm water line along McClaine St. are added for stormwater management purposes. A standard sidewalk and shared-use path are designed to allow access to McClaine St. for bicyclists and pedestrians going each way.