The line northwest of Pittsburgh opened in 1879 as part of the
Pittsburgh and Lake Erie Railroad. The rest of the line, southeast from Pittsburgh, was opened in 1883 by the
Pittsburgh, McKeesport and Youghiogheny Railroad. The latter company was leased by the P&LE. In 1934, the
Baltimore and Ohio Railroad began operating through trains via
trackage rights over the P&LE between McKeesport (slightly north of the current beginning of the Pittsburgh Subdivision until the
bridge at Sinns opened in 1968) and New Castle, leaving the
P&W Subdivision for local trains only. Eventually the P&LE, which had been jointly owned by CSX and
Conrail, was merged into CSX. ==See also==