The S&C Subdivision is a railroad line owned and operated by CSX Transportation

CSX Transportation

CSX Transportation operates a Class I railroad in the United States known as the CSX Railroad. It is the main subsidiary of the CSX Corporation. The company is headquartered in Jacksonville, Florida, and owns approximately 21,000 route miles...

 in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Pennsylvania

Pennsylvania

The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

. The line runs from the Keystone Subdivision

Keystone Subdivision

The Keystone Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and Pennsylvania. The line runs from Cumberland, Maryland west to McKeesport, Pennsylvania along a former Baltimore and Ohio Railroad line...

 at Rockwood

Rockwood, Pennsylvania

Rockwood is a borough in Somerset County, Pennsylvania, United States. The population was 954 at the 2000 census. It is part of the Johnstown, Pennsylvania Metropolitan Statistical Area.-Geography:Rockwood is located at ....

 north to Johnstown along a former Baltimore and Ohio Railroad

Baltimore and Ohio Railroad

The Baltimore and Ohio Railroad was one of the oldest railroads in the United States and the first common carrier railroad. It came into being mostly because the city of Baltimore wanted to compete with the newly constructed Erie Canal and another canal being proposed by Pennsylvania, which...

 line, once the Somerset and Cambria Railroad.

History

The Somerset and Mineral Point Railroad opened the line from Rockwood (then called Mineral Point) to Somerset in the early 1870s, and the rest of the way to Johnstown around 1880 after being reorganized as the Somerset and Cambria Railroad. Through leases and mergers, the line became part of the B&O and CSX.