The CSX Corporation is an American holding company focused on real estate and railways in North America, among other industries.
 The company was established in 1978 as part of the Chessie System and Seaboard Coast Line Industries merger.
 The Chessie System and Seaboard Coast Line Industries which includes all railroads of both companies became subsidiaries of the CSX Corporation and both companies were merged into the CSX Corporation in 1980, the third year that the CSX Corporation was in operation.
Port Huron & Detroit Railroad Company was incorporated on September 1, 1917 in the State of Michigan, United States of America, to own and operate 14 miles of railroad track along the Saint Clair River from Port Huron, Michigan to Marine City, Michigan.
 It remained in business until it was sold to the Chesapeake & Ohio Railroad (then part of Chessie System) in December, 1984.
 Most of its original trackage is still being operated today by CSX Transportation Co. with whom Chesapeake & Ohio Railroad merged into on September 2, 1987.
The Chesapeake and Ohio Railway was a Class I railroad formed in 1869 in Virginia from several smaller Virginia railroads begun in the 19th century.
 Led by industrialist Collis P. Huntington, it reached from Virginia's capital city of Richmond to the Ohio River by 1873, where the railroad town (and later city) of Huntington, West Virginia was named for him.
The Mountain Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and West Virginia.
 The line runs from Cumberland, Maryland west to Grafton, West Virginia along the original Baltimore and Ohio Rail Road (B&O) main line.
 It was known as the West End Subdivision until the B&O's absorption into the Chessie System, and included the B&O's original crossing of the Allegheny Mountains.
 Through CSX traffic to the west from Cumberland now uses the Keystone Subdivision over Sand Patch Grade.
The Seaboard System Railroad, Inc. was a short-lived former US Class I railroad that was created after the consolidation of the Family Lines System railroads (notably the Louisville & Nashville, Seaboard Coast Line, and Clinchfield) on December 29, 1982.
 Under the Family Lines era, the railroads shared common ownership but used different names when conducting business.
 On July 1, 1986, the Seaboard System renamed itself as CSX Transportation and absorbed the Chesapeake & Ohio Railway on August 31, 1987 which ended the CSX Corporation's shared ownership of the Seaboard System and Chessie System railroads.
Kavanaugh, Kentucky is an unincorporated community located in Boyd County, Kentucky, located along U.S. Route 23 directly north of the Lawrence County line.
 In 1984, the original alignment of U.S. 23 was replaced with a modern four-lane highway.
 CSX Transportation's Big Sandy Subdivision railroad tracks pass through the community.
 The railroad was formerly operated by the Chessie System and its predecessor the Chesapeake and Ohio Railway Company.
Indigo Tunnel is an abandoned railroad tunnel in Allegany County, Maryland, located about 1 mi east of Little Orleans.
 Built by the Western Maryland Railway (WM) in 1904, Indigo was the company's longest tunnel.
 It was part of a major WM project to extend its rail system from Hagerstown west to Cumberland.
 This difficult route followed the Potomac River valley and involved construction of four additional tunnels and 23 bridges.
 The new rail line opened for traffic in 1906.
 Trains ran through the tunnel until the rail line was abandoned by the newly formed Chessie System in 1975, in favor of the parallel Baltimore and Ohio railroad line on the opposite side of the Potomac River.
Chessie System, Inc. was a holding company that owned the Chesapeake & Ohio Railway (C&O), the Baltimore & Ohio Railroad (B&O), the Western Maryland Railway (WM), and several smaller carriers.
 It was incorporated in Virginia on February 26, 1973, and it acquired the C&O (which controlled the other companies) on June 15.
 C&O had been popularly known as "Chessie System" since the 1930s.
William C. Goodridge (1806–1873) was a prominent biracial businessman in York, Pennsylvania in the mid 1800s.
 He was an African-American abolitionist and a conductor on the Underground Railroad.
 Born a slave, Goodridge and his wife, Evalina Wallace Goodridge, started with a barbershop in 1827 and built a significant estate through diverse investments and enterprises, all of which they put at risk as stationmasters in the Underground Railroad.
 Among those whose freedom Goodridge helped secure and retain, were the farmers and one fugitive slave involved in the Christiana Resistance of 1851, where black and white abolitionists killed a Southern slaveholder who was pursuing his property in Christiana, Pennsylvania according to rights granted to him by the Fugitive Slave Act of 1850.
 Goodridge also conducted Osborne Perry Anderson, first lieutenant of John Brown, in his escape to Canada following the failed 1859 raid on Harpers Ferry.
 Both the Christiana Resistance and the raid on Harpers Ferry were significant events leading up to the Civil War.
"Mount Winans" ("Mt. Winans") is a mixed-use residential, commercial and industrial neighborhood in the southwestern area of the City of Baltimore in Maryland.
 Its north, south and east boundaries are marked by the various lines of track of the CSX Railroad (formerly the historic Baltimore and Ohio Railroad before 1987, and later briefly, the "Chessie System").
 In addition, Hollins Ferry Road running to the south towards suburban Baltimore County in the southwest and further connecting with adjacent Anne Arundel County to the southeast, draws its western boundary.

Question: Which railroad did Chessie System own that was formed in the mid 1800s in Virginia?
Answer: Chesapeake and Ohio Railway