and to Tivoli on August 4. The full line opened on October 8, 1851 with the completion of the final segment between Tivoli and Poughkeepsie, linking the two pieces of the line together. Prior to completion, on June 1, the Hudson River leased the Troy and Greenbush. Cornelius Vanderbilt purchased the Hudson River Railroad in 1864, soon after he bought the parallel New York and Harlem Railroad, which is today's Harlem Line. He merged these and other short line railroads to form the New York Central and Hudson River Railroad, which was renamed the New York Central Railroad in 1914. One of the properties owned by the New York and Harlem was the Spuyten Duyvil and Port Morris Railroad. This railroad was built in 1842, and bought in 1853 by the New York and Harlem as part of a proposal by NY&H Vice President Gouverneur Morris Jr. to integrate it into a new industrial section of the waterfront. After this railroad became property of the New York Central and Hudson River Railroad, by 1871, the line was extended through the West Bronx, along the Harlem River to connect with the Hudson River Railroad. The segment north of Mott Haven Junction became part of the Hudson Division, while the portion to the south remained part of the Harlem Division. With the opening of the line, most passenger trains were rerouted into the new Grand Central Depot via that line along the northeast bank of the Harlem River and the New York and Harlem Rail Road, also part of the New York Central system. In 1893, a third track was added along the line between Spuyten Duyvil and Sing Sing. Realignment and electrification This line was rebuilt and realigned in 1905–1906 when the Harlem River Ship Canal was built. The line was realigned along the north side of the canal in Marble Hill, Manhattan. Part of the original segment around Marble Hill became a freight spur leading to the Kingsbridge Freight Station, but the track around the northern and western sides of Marble Hill was later removed and no trace of it exists. Today, the realigned line serves as the segment of the Metro-North Railroad Hudson Line between Mott Haven Junction and the West Side Line. The former Kingsbridge Freight Spur and station has been occupied by the grounds of the John F. Kennedy High School since the 1970s. The New York