Thomas Viaduct celebrates its 175th anniversary in July

(Baltimore Sun) ... The object of their veneration is the majestic Thomas Viaduct, the 704-foot-long, eight-arched, stone Baltimore and Ohio Railroad bridge that spans the Patapsco between Baltimore and Howard counties, and has been carrying trains since it opened for business in 1835. A moment later, a heavy southbound freight train whistled in the narrowing distance and then several growling CSX diesel locomotives rolled by as squealing flanges from its mix of cars produced notes only found on the upper register of a violin, interrupting conversation. Continued

Images: MDRails, Library of Congress