US 40 Arch Bridge


Maryland State Highway Administration


Howard County, Maryland

Key Challenges & Project Details

  • A historic open-spandrel concrete arch bridge that passes through Patapsco Valley State Park and spans above a stretch of the Patapsco River.
  • This was the most extensive renovation since it was built in 1935 and is expected to extend its lifespan to 50 years.
  • Part of MSHA’s bridge system preservation program.
  • Bridge was demolished down to the existing arches and then rebuilt from the original arches.
  • Construction of temporary shoring, shielding, local strengthening and temporary struts for bridge rehabilitation.
  • Replaced floor system, including end posts at end floor beams, spandrel columns and struts.
  • Maintenance of traffic handled 37,000 vehicles traveling through the project daily.
  • Constructed two temporary bridges for east and westbound travelers through the work area.
  • Four retaining walls.

Awards Received

  • 2013 MdQI Award of Excellence Project of the Year – Over $5 Million
  • 2013 MdQI Award of Excellence Project Over $5 Million
  • 2013 Maryland Chapter American Concrete Institute (ACE) Excellence in Concrete Award –Heavy Construction