The firm started in 1914 as Harrington, Howard & Ash specializing in the construction of moveable bridges. In 1941 it changed its name to Howard, Needles, Tammen & Bergendoff. In 1975 it merged with Kivett And Myers to form a sports architecture practice.
It formally changed its name to HNTB Corporation in 1993 and became employee-owned in 2000.
- Greenville Bridge - Greenville, Mississippi and Lake Village, Arkansas
- Charles W. Dean Bridge - Arkansas City, Arkansas and Benoit, Mississippi
- Delaware Memorial Bridge - New Jersey and Delaware
- Fuller Warren Bridge - Jacksonville, Florida
- Hoan Bridge - Milwaukee, Wisconsin
- Missouri River Pedestrian Bridge - Omaha, Nebraska (planned for November 2008)
- South Omaha Veterans Memorial Bridge - Omaha
- Stillwater Lift Bridge - Stillwater, Minnesota
- Leonard P. Zakim Bunker Hill Bridge - Boston, Massachusetts
- Perry Street Bridge - Napoleon, Ohio
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