Statistics for occurrence #1 of “Long Bridge” in chapter 14 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 5: Forts and Artillery.:

...During the retreat of General Pope, the railroads under This scene of March, 1864, suggests some of the difficulties which confronted the superintendent of military railroads during the war. Long Bridge , from the railroad-man's viewpoint, was not a very substantial structure. J. J. Moore, chief engineer and general superintendent of military railroads of Virginia, reported to Brigadier-General D. ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Long Bridge (Pennsylvania, United States) 258 22 2 0 0 user votes
Long Bridge (Louisiana, United States) 12 0 0 0 0 user votes
Long Bridge (New York, United States) 10 0 0 0 0 user votes
Long Bridge (Louisiana, United States) 0 0 0 0 0 user votes
Long Bridge (New Jersey, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.