Before revision: The ] viaduct is now owned and operated by CSX Transportation and is still in use today, making it one of the oldest railroad bridges still in service.
After revision: BENJAMIN LATROBE and the THOMAS VIADUCT, The Maryland Surveyor, September 2000,pp 20-28,www.marylandsurveyor.org, accessed 6 April 2024 citing The ] viaduct is now owned and operated by CSX Transportation and is still in use today, making it one of the oldest railroad bridges still in service.