In 1873, the newly organized Union Railroad built a new set of tracks in northeastern Baltimore, connecting the original PW&B main line with the Northern Central Railway (NCRY) going north to York and Harrisburg, Pennsylvania. The new connection ran through the new Union Tunnel to NCRY's new Charles Street Station, north of Mount Royal Avenue. (This station, originally named "Union Station," was rebuilt twice and renamed "Pennsylvania Station" in 1928.) This station on North Charles Street and its successors, in the northern reaches of the city, largely replaced the earlier President Street Station on the southeast for passenger service. The latter continued to serve as a freight station into the 1940s World War II era but served some passenger trains until 1911. The Pennsylvania Railroad, which acquired the PW&B in a merger in 1881, demolished the President Street's eastern train shed after heavy snow damage in 1913 and erected a new, shorter shed, built with wooden roof trusses.