The Pittsburgh Division had its earliest beginnings in 1837, but what would be known as the main line was not completed until 1871.
Images of Modern America: The Baltimore & Ohio Railroad s Pittsburgh Division looks at five of these lines: the B&O Main Line from Cumberland to Pittsburgh; the Pitts.
At its height, the Pittsburgh Division consisted of five distinct main lines and 14 branch lines, and the Division had trackage rights over the Western Maryland and Pittsburgh & Lake Erie Railroads.
The Pittsburgh Division had its earliest beginnings in 1837, but what would be known as the main line was not completed until 1871