Parsons Corporation is highlighting 30 years of infrastructure development across the Pacific Northwest, including transportation projects designed to improve connectivity, strengthen public transit and support long-term regional growth.
The company’s work includes the Federal Way Link Extension in Washington, a 7.8-mile light rail extension connecting communities from SeaTac to Federal Way. The project achieved corridor-wide Envision Platinum certification, reflecting its sustainability objectives.
Parsons also provided engineering services for the preservation study of the Bridge of the Gods, which crosses the Columbia River between Oregon and Washington. The study examined seismic vulnerabilities, structural deterioration and potential improvements to support the bridge’s long-term safety and use.
Another major project is the I-405/NE 85th Street Interchange and Inline Bus Rapid Transit Station in Washington. The planned multimodal hub is designed to integrate roadway improvements with direct-access bus rapid transit, pedestrian routes, bicycle access and tolling systems.
The company’s portfolio also includes the Tacoma Narrows Bridge, a 5,400-foot suspension bridge that forms part of State Route 16 and connects Tacoma with Gig Harbor. The project used design-build delivery and incorporated wind and seismic engineering measures to support long-term performance.
Parsons’ infrastructure work also includes projects that protect critical assets and address environmental risks. In Seattle, the company served as prime consultant and engineer of record for the Seattle Seawall Project, which replaced a deteriorating waterfront structure. The project incorporated seismic resilience and environmental restoration measures to protect city infrastructure and improve the ecological health of Elliott Bay.
On Washington’s Olympic Peninsula, Parsons led design work for the US 101 Fish Barrier Removal Project. The work involved replacing culverts that blocked fish passage, reconstructing stream channels and reducing disruption to highway traffic during construction. The improvements reopened upstream habitat for salmon, steelhead, bull trout and other species while helping reduce flood and scour risks along the highway.
The project received a silver award from the American Council of Engineering Companies of Washington for future value to the engineering profession and enhanced public awareness.
Across the Pacific Northwest, Parsons’ portfolio illustrates how transportation development can combine mobility improvements with infrastructure preservation and environmental protection. The company reports experience spanning more than 10,000 miles of roadways, 4,500 bridges and more than 50 advanced traffic management system deployments.
As regional communities continue to develop, these projects demonstrate the role of engineering and infrastructure planning in supporting transportation networks, economic activity and long-term resilience.
Source: Parsons.
