Sverdrup & Parcel

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Chesapeake Bay Bridge-Tunnel

Sverdrup & Parcel was an American civil engineering company formed in 1928 by Leif J. Sverdrup and his college engineering professor John I. Parcel. The company worked primarily in a specialty field of bridges. The company's headquarters was located in St. Louis, Missouri.

The firm was the designer of the ill-fated I-35W Mississippi River bridge, Minneapolis, Minnesota, 1964 (collapsed on August 1, 2007).[1] The official report by the National Transportation Safety Board blamed the bridge collapse on a design error by the firm, resulting in the gusset plates having inadequate load capacity.[2]

Some other well-known projects of Sverdrup & Parcel include:

Sverdrup & Parcel was succeeded by Sverdrup Civil, which in 1999 was part of the merger between Sverdrup and Jacobs Engineering.


  1. ^ Jaccarino, Mike; Burke, Kerry; Connor, Tracy (August 4, 2007). "Hey, don't blame me for collapse". Daily News. New York. Retrieved August 4, 2007.
  2. ^ NTSB Staff (November 14, 2008). Collapse of I-35W Highway Bridge Minneapolis, Minnesota (PDF) (Report). National Transportation Safety Board. Retrieved March 4, 2010.

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