Visit - Thomas Viaduct spans Patapsco River and Patapsco Valley between Relay and Elkridge Maryland

 Copyright 2020 Photograph by Katherine S. Kalis



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Commissioned by the Baltimore and Ohio Railroad and completed in 1835, it was the largest railroad bridge in the United States and the first multi-span masonry railroad bridge to be built on a curve. It has been designed a National Historic Civil Engineering Landmark. It was named for the B&O's first president, Philip E. Thomas

  Copyright 2020 Katherine S. Kalis
Thomas Viaduct
 Copyright 2020 Katherine S. Kalis
Thomas Viaduct
Copyright 2020 Katherine S. Kalis
Thomas Viaduct

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