LMN Architects Celebrates the Completion of the Grand Avenue Park Bridge in Washington

The bridge creates a new viewing platform and civic space with an inventive, accessible pathway. The project is the first pedestrian and utility bridge designed by the Firm in partnership with KPFF Consulting Engineers, and it is a composition of concrete and steel, design and functionality, nature and digital design technology.

Seattle, Washington, UNITED STATES


Seattle, Oct. 05, 2020 (GLOBE NEWSWIRE) -- LMN Architects celebrates the completion of the Grand Avenue Park Bridge in Everett, Washington. The 257-foot-long asymmetrical weathering steel truss spans from the hillside to a vertical concrete tower, creating a sequence of new civic spaces and connecting Grand Avenue Park with Everett’s growing waterfront district.

Elevating utilitarian infrastructure to a thoughtfully designed community asset, the Grand Avenue Park Bridge highlights the value of rethinking public realm design. The bridge transforms the Everett waterfront, establishing a new connection between the historical Grand Avenue Park and the city’s developing waterfront district. At the bridge’s recent opening, Mayor Cassie Franklin commented, “It is a beautiful bridge, it is a utility project, and it is going to be part of our city for generations to come. It is a gorgeous new asset.”

The new bridge solves a complicated sequence of grade-changes and utility needs in an unlikely new form that weaves pedestrian ramps and stairs above, around, and inside a sloping truss, presenting an inviting new crossing from Grand Avenue Park to the waterfront district. Across its 257-foot span, the bridge carries major utilities while navigating a network of existing electrical lines, a five-lane highway, and the BNSF train tracks at the base of an 80-foot-tall steep slope, all while preserving views from the park above. In part, the amazing views are preserved by having a unique entrance onto the top of the bridge such that most of the bridge structure is below Grand Avenue Park.

“As designers, we found these circumstances the perfect opportunity to create a place where the accessible features would define the experience,” says LMN Partner Stephen Van Dyck, AIA. “In its design, the Grand Avenue Park Bridge is also a destination. The bridge’s paths, stairs and spaces create a variety of views beyond and within that make it a place of discovery.”

The design is pragmatic and economical. The truss form responds directly to its programmatic needs while recalling the form and character of traditional railroad trusses found across the Pacific Northwest. The structural elements are constructed of weathering steel, a raw form of steel, which uses rust to form a protective layer, providing corrosion resistance and enhancing the bridge’s maintainability over time. Wrapping around and running through the truss, a shining, lacey guardrail also serves as the bridge’s de-facto wayfinding system, contrasting with the raw character of the rusted truss with its silvery aluminum panels.

The guardrail features a bespoke perforation that is inspired by the forms of the surrounding natural environment. The varied density of perforations was designed to enhance reflectivity of the artificial lighting, improving the performance of the integrated linear lights at the top of the rail while minimizing glare and light pollution. Each aluminum panel is unique, responding to the geometry of the bridge, views beyond, and varying guardrail requirements.

Geometry for the 400 aluminum panels was generated through a computer script, automating the layout, numbering and cut file production. A separate file for each panel was provided to a fabricator for use with their computer numerically controlled (CNC) Waterjet. LMN Principal Scott Crawford says, “LMN’s experimentation with our own CNC machine to fabricate full-scale mockups was essential for refining the scale of the pattern, adjusting the amount of area for the light reflection, and testing the digital cut files. This close collaboration allowed for a solution that is finely tuned to its context.”

The overlay of large-scale truss elements and small-scale perforations creates a dynamic experience of view, light and shadow along the walking path. A tall concrete elevator and utility core serve as the western abutment, its concrete walls blasted with the same perforation pattern and wrapped in a staircase that leads to the pedestrian-level waterfront promenade. The bridge’s iconic presence is rooted in the unexpected formal juxtaposition of muscular and delicate, rustic and refined, symmetrical and asymmetrical, inside and out. Since its completion in late August, the Grand Avenue Park Bridge has become a popular destination, enhancing the pedestrian life of the Northwest neighborhood and the growing mixed-use waterfront district. By embracing a creative pragmatic approach, the design addresses both functional and aesthetic demands, weaving urban infrastructure into the life of the city and becoming a catalyst for continued community revitalization.

LMN Architects is recipient of the 2016 AIA National Architecture Firm Award and is widely recognized for its design of projects that support smart, sustainable, cities. The firm has successfully completed more than 700 projects across North America, including the double LEED Platinum Vancouver Convention Centre West in Vancouver, Canada; Cleveland Convention Center & Civic Core in Cleveland, Ohio; Tobin Center for the Performing Arts in San Antonio, Texas; and the Voxman Music Building at the University of Iowa in Iowa City, Iowa. The firm’s ongoing dedication to communities at all scales is underscored by its design approach, creating environments that elevate the social experience.

About LMN Architects
Since its founding in 1979, LMN Architects has dedicated its practice to the health and vitality of communities of all scales. Internationally recognized for the planning and design of environments that elevate the social experience, the firm works across a diversity of project typologies, including higher education facilities, science and technology, civic and cultural projects, conference and convention centers, urban mixed-use and transportation.

LMN has successfully completed over 700 projects across North America, including the Voxman Music Building at the University of Iowa in Iowa City, Iowa; Tobin Center for the Performing Arts in San Antonio, Texas; Vancouver Convention Centre West in Vancouver, Canada; Sound Transit University of Washington Station in Seattle, Washington; and the new Seattle Asian Art Museum.

Based in Seattle, Washington, LMN Architects is led by partners John Chau, Sam Miller, Walt Niehoff, Wendy Pautz, Mark Reddington, George Shaw, Stephen Van Dyck, and Rafael Viñoly-Menendez. The firm employs 165 talented professionals practicing architecture, interior design, and urban design, and the quality of the work has been recognized with nearly 300 national and international design awards, including the prestigious 2016 National Architecture Firm Award from the American Institute of Architects (AIA).

For more information on the work of LMN Architects, please visit lmnarchitects.com

Attachments

 
Aerial view of the new Grand Avenue Park Bridge in Everett, Washington. Photo: © Adam Hunter/LMN Architects. Detail view of the aluminum panels, the truss, and the structure of the Grand Avenue Park Bridge. Photo: © Adam Hunter/LMN Architects.

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