List of Seaboard Air Line Railroad precursors
Below is a list of railroads that were bought, leased, or in other ways had their track come under ownership or control by the Seaboard Air Line Railroad or one of its predecessors. The Seaboard Air Line Railroad merged with the Atlantic Coast Line Railroad on July 1, 1967, to form the Seaboard Coast Line Railroad. Predecessor lines. The Seaboard main line from Richmond to Tampa, heart of its 2600-mile system in 1900, (today mostly CSX's "S" Line), had been built by the following companies: Acquired lines. In the first decades  of the 20th century, Seaboard expanded its holdings by acquiring the following lines, some of which were created by the Seaboard to construct new lines it wished to have. Acquired by purchase: Acquired by lease: Seaboard Air Line Railway. Oxford and Coast Line Railroad. Line from Dickerson to Oxford, NC