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  • Connecting the Quad Cities
  • Arch construction milestone reached on I-74 Bridge designed by Modjeski and Masters
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  • New San Bernard River Bridge keeps traffic moving for Union Pacific Railroad 
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  • The new I Street Bridge will be a multipurpose civic icon that offers a seamless extension of both sides of the Sacramento river and reflects the values and characteristics of its surrounding community.
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Modjeski and Masters, an employee-owned company, is one of the world’s leading bridge engineering firms, providing design, analysis, inspection, and rehabilitation services for all types of bridges.

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From small projects to large, complex engagements; from practical design to innovative, smart infrastructures, you can count us to be agile; to scale our teams and efforts to projects of any size and complexity.

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Modjeski and Masters offers complete life-cycle bridge engineering services across multiple disciplines. We're dedicated to providing comprehensive, industry-leading expertise on all projects.

Home Insight Preview Image 00 Portageville
01 Insights

Replacing an Icon

Since 1852, the Portage Viaduct has carried a rail line across the Genesee River Gorge, near the town of Portageville, NY. First made of timber, then replaced with a wrought iron structure , the crossing became an icon for the community. Tasked with replacing the viaduct, Modjeski and Masters worked with the community and the Norfolk Southern Railway Co. to create a new iconic arch bridge for the gorge.

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02 Insights

Preserving the Past While Designing For the Future

Bridge renovations come with many challenges, and when a bridge is of historical significance, those challenges are often multiplied. Historical bridges bring about unique complications and often carry a profound importance for the communities where they stand. The Huey P. Long Bridge in New Orleans, Louisiana is one such bridge that, in its own right, serves as a landmark. 

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03 Insights

Precast Concrete Pier Caps Aid Construction of Flyover Bridge

By using precast concrete pier caps in the design of the Southbound I-95 to Eastbound J.T. Butler Boulevard Flyover Bridge, Modjeski and Masters overcame significant issues during construction. Learn more about how the pier caps were designed not only as an aesthetic component of the bridge, but also an integral part of the collaborative process that made this project a success.

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04 Insights

Innovative Project Delivery Model Ensures Success

Since its construction in 1929, Modjeski and Masters has been deeply involved with the Ambassador Bridge. In the many decades since, through multiple owners and its growth into the busiest international crossing in North America, Modjeski and Masters has worked to keep the bridge maintained, but with an innovative twist to project delivery.

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Home Insight Preview Image 03 Mlk Bridge
05 Insights

Rehabilitating the Martin Luther King Bridge

How do you rehab a 65-year-old bridge that serves as a key point of traffic relief and a route directly into downtown St. Louis with limited original structure information? This is a challenge the Illinois Department of Transportation (IDOT) and Modjeski and Masters Inc. faced during a recent project on the Martin Luther King Bridge.

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Home Insight Preview Images Straw Bridge
06 Insights


Need a fun learning activity for your kids? We're making a version of our straw bridge exercise available for download to help parents have fun teaching their kids about engineering. With many of our kids still online learning, here's another idea for when you're learning at home. All you need are some straws, some tape, and some time.

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