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Parsons Brinckerhoff provides comprehensive engineering services for all building types - commercial, residential, and industrial - and offers particular expertise in intelligent and sustainable buildings.

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Parsons Brinckerhoff provides expertise in road, rail, transit, ports, and aviation as well as integrated planning and multimodal studies. Stakeholder engagement and tailored public consultation are prerequisites for the planning projects we undertake.

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Working with key project stakeholders, Parsons Brinckerhoff guides projects from initial conceptualization, through critical environmental, financing and funding processes, and into design, construction, start-up and operation.

Parsons Brinckerhoff is a certified Autodesk^® Training Center. We also undertake various special projects and studies, and prepare detailed reports related to power and energy, as well as pioneer the use of emerging technologies.

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Drawing on more than a century of experience, Parsons Brinckerhoff provides a full range of services for all modes of transportation - including airports, highways, rail systems, ports and buses.

Parsons Brinckerhoff visualization specialists deliver state-of-the-art visual communications tools and technologies for improved project delivery throughout the project life cycle.

Parsons Brinckerhoff works on water and wastewater projects - including water supply, conveyance, and pioneering wastewater treatment projects - in major urban areas and rural communities around the world.
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Alaskan Way Viaduct and Seawall Replacement

Seattle, Washington, United States

Client: Washington State Department of Transportation

Parsons Brinckerhoff Role: General Engineering Consultant, Project Visualization (3D Modeling, Interactive Application Development, Virtual Design & Construction)

Show Project Details

As general engineering consultant, Parsons Brinckerhoff served for 10 years as lead strategic advisor assisting the Washington State Department of Transportation (WSDOT) in eliminating its greatest public safety risk—the seismically vulnerable viaduct running along the Seattle waterfront. The project included preparation of an environmental impact statement and bid documents in connection with replacing the viaduct, which runs more than 2 miles (3.2 kilometers) and carries 110,000 vehicles daily. In addition, conceptual design was prepared for replacement of the 6,500-foot-long (1,980-meter) Elliott Bay Seawall.

The $3.1 billion replacement program includes approximately 1 mile (1.6 kilometers) of new elevated roadway in the south end connecting to a bored 56-foot-diameter (17-meter) tunnel approximately 2 miles long (3.2 kilometers) with a stacked interior roadway beneath the downtown. The Parsons Brinckerhoff team developed the design-build technical requirements and specifications for the tunnel, the largest ever constructed by tunnel boring machine technology.

The team also led a rigorously inclusive public involvement program to help define and communicate project goals and develop political consensus. Project visualization proved to be an invaluable tool to inform the public and as a design tool to determine the viability of proposed concepts. Parsons Brinckerhoff drew upon CAD and geospatial data to develop digital 3D and Building Information Models for all of the major parts, pieces and processes of the project.

Tunnel construction is expected to begin in late 2011 under a $1.4 billion design-build contract. Completion is scheduled for late 2015.

VIEW AN ANIMATION:
http://www.youtube.com/user/projectviz#p/u/2/NZanN81Bui4
http://www.youtube.com/user/projectviz#p/u/4/dIdIefHt308

About Transportation

Beginning with our founder’s groundbreaking work on the New York City subway, the Cape Cod Canal and a rail line in China, Parsons Brinckerhoff has been an acknowledged leader in transportation planning, engineering and management for more than a century.

Parsons Brinckerhoff’s experience extends to every form of transportation, including airports, rail systems, buses, roads and ports. We work under any form of project delivery and can provide services during any phase of the project life cycle, from concept to completion.

Our services include strategic consulting and feasibility studies, planning and environmental analysis, engineering design and construction management, and operations & maintenance. We also provide broad oversight and direction of large, complex capital projects, and we have worked on integrated teams with our clients to deliver some of the world’s largest and most well-known transportation infrastructure projects. We view transportation as a means to improve the communities in which we work and wherever possible apply the latest concepts in sustainable development to improve social, economic and environmental conditions.