Bothell Crossroads SR 522 Realignment
The Bothell Crossroads project realigned SR 522 to the south between Hall Road and 102nd Avenue NE. The new highway consists of two travel lanes in each direction, left turn lanes, sidewalks separated from traffic by tree-lined planters, and landscaped medians. Connecting streets (NE 180th Street, 98th Avenue NE, and SR 527) were extended to reach the new alignment—creating three new intersections (two signalized) and providing pedestrians additional opportunities to move between downtown and the Park at Bothell Landing. The intersection at SR 522/SR 527 had previously performed poorly and was expected to degrade further without action. After completion of this project, congestion improved for over 44,000 vehicles passing though this intersection daily. The project also improved safety on this critical commuter and freight corridor. Work included signals, lighting, sidewalks with pedestrian railings, paving, landscaping, utilities, and a cast-in-place fascia wall that provided an aesthetic gateway to the City of Bothell.
Atkinson also ensured future compatibility for the eventual re-channeling of Horse Creek under SR 522. To eliminate the need to dig up the now completed roadway, Atkinson installed a precast box culvert that was sealed on each end and placed the required streambed gravel within. This allowed the future contractor to simply break the seal at each end of the box and extend it without impacting SR 522. This future compatibility minimized future cost, schedule, and traffic impacts as the Downtown Bothell Revitalization Plan continued.
At the start of the project—and in collaboration with the City of Bothell—Atkinson designated work zones and streets as either “night work” or “day work” areas. Work in areas that affected traffic was performed at night during off-peak hours to minimize lane closures and construction impacts during commuting hours. Work performed near residential areas was performed during the day to minimize impacts to residents' quality of life.