Bothell Crossroads SR 522 Realignment

Client

City of Bothell

Completion Date

2014

Designer

Perteet

Location

Bothell, Washington

Delivery Method

General Contractor

Division

Northwest

Contract Value

$15 million
Bothell Crossroads

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.

Future compatibility for the re-channeling of Horse Creek beneath SR 522 was carefully considered. To overcome the need for excavation of the newly completed roadway in the future, a precast box culvert was installed, sealed at both ends, and filled with the required streambed gravel. This strategic choice enables a future contractor to break the seal at each end of the box and extend it without disrupting the integrity of SR 522. This future compatibility minimizes potential future expenses, project timelines, and traffic disruptions, aligning with the ongoing Downtown Bothell Revitalization Plan.

At the start of the project—and in collaboration with the City of Bothell—Atkinson designated distinct work zones and streets as either "night work" or "day work" areas. Work activities impacting traffic were scheduled during nighttime off-peak hours to minimize lane closures and construction-related disruptions during peak commuting hours. Work that was conducted in proximity to residential areas was planned for daytime hours, mitigating potential disturbances to residents' quality of life.