The Thomas Viaduct
Commenced, July 4th, 1833. Finished July 4th, 1835.
Johnathan Knight, Chief Engineer, Caspar W. Wever, Superintendent of Construction. Designed by Benjamin H. Latrobe. Built by John McCartney of Ohio.
(Other two sides of the monument list company directors.)
Marker can be reached from Railroad Avenue near Viaduct Avenue.
Courtesy hmdb.org
