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Press Release: AIT Bridges Ships First Composite Bridge System to the West Coast

Updated: Sep 14, 2021

AIT Bridges, a division of Advanced Infrastructure Technologies (AIT), a designer and supplier of composite bridge systems and structural components for commercial construction, today announced that it has delivered the first composite arch bridge system to the West Coast, on SR 203 in Duvall, Washington.

This bridge is comprised of 12 fiberglass composite arches manufactured at AIT’s Brewer, Maine facility, and its construction marks several milestones. The bridge’s arches span 51 feet and were cut in half to facilitate cross-country shipping. The bridge required no transportation permits due to its ability to be cut and then easily reassembled on site.

This bridge will also help facilitate the restoration of the stream that it traverses. The stream under the previous bridge was approximately five feet wide. It will now be widened and restored to its previous size of 20 feet to accommodate the return of fish and other wildlife to the area.

Developed in cooperation with The University of Maine’s Advanced Structures and Composites Center, AIT Bridges’ product offerings have been commercially available and installed since 2010. Its composite arch bridge system uses concrete-filled composite tubes and FRP decking, providing an affordable and superior alternative to traditional steel and concrete small-to medium-sized bridges.

“It took some planning to achieve the transportation and assembly of the first ever composite bridge system to the West Coast. We saved time and money by splicing the bridge arches as they were trucked across the country. No permits, no road closures and now that the materials are on site, we are looking at an expedited bridge building process,” said Ken Sweeney, president and Chief Engineer, AIT Bridges. “This bridge is also ushering in a new era for the stream it crosses. Wildlife restoration is an important “perk” of this particular project. We look forward to seeing the completed span open for traffic this fall.”

The bridge’s construction is expected to be completed in September 2020. For more information about AIT Bridges, please visit:

About AIT Bridges

AIT Bridges, a division of Advanced Infrastructure Technologies, is the leading producer of innovative composite bridge solutions, providing a unique tailored customer experience. We aim to provide cost-effective and high-quality composite bridge solutions to meet today’s complex design, durability, and environmental challenges.

Our systems utilize components from the 'Bridge-in-a-Backpack' technology, developed over an 11+ year period by the Advanced Structures and Composites Center at the University of Maine. The goal was to develop a rapidly deployable bridge technology for the military. In 2008, Advanced Infrastructure Technologies (AIT) was formed to commercialize the inflatable arch technology. AIT Bridges expanded the composite product line and designed a composite arch bridge system built from the original technology. The resulting composite arch bridge system utilizes advanced composites materials to produce a rapidly constructed bridge system that offers an extended lifespan with little to no maintenance.


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