The Baltimore and Ohio Railroad was the first common carrier railroad and the oldest railroad in the United States. It operated as B&O from 1830 until 1987, when it was merged into the Chessie System; its lines are today controlled by CSX Transportation.
The Allegheny Portage Railroad was the first railroad constructed through the Allegheny Mountains in central Pennsylvania. It operated from 1834 to 1854 as the first transportation infrastructure through the gaps of the Allegheny that connected the midwest to the eastern seaboard across the barrier range of the Allegheny Front. Approximately 36 miles (58 km) long overall, both ends connected to the Pennsylvania Canal, and the system was primarily used as a portage railway, hauling river boats and barges over the divide between the Ohio and the Susquehanna Rivers. Today, the remains of the railroad are preserved within the Allegheny Portage Railroad National Historic Site operated by the National Park Service.
The Patapsco River mainstem is a 39-mile (63 km) river in central Maryland that flows into the Chesapeake Bay. The river's tidal portion forms the harbor for the city of Baltimore. With its South Branch, the Patapsco forms the northern border of Howard County, Maryland. The name "Patapsco" is derived from the Algonquian pota-psk-ut, which translates to "backwater" or "tide covered with froth".
The B&O Railroad Museum is a museum and historic railway station exhibiting historic railroad equipment in Baltimore, Maryland. The Baltimore and Ohio Railroad (B&O) company originally opened the museum on July 4, 1953, with the name of the Baltimore & Ohio Transportation Museum. It has been called one of the most significant collections of railroad treasures in the world and has the largest collection of 19th-century locomotives in the U.S. The museum is located in the Baltimore and Ohio Railroad's old Mount Clare Station and adjacent roundhouse, and retains 40 acres of the B&O's sprawling Mount Clare Shops site, which is where, in 1829, the B&O began America's first railroad and is the oldest railroad manufacturing complex in the United States.
Pigtown is a neighborhood in the southwest area of Baltimore, bordered by Martin Luther King Jr. Boulevard to the east, Monroe Street to the west, Russell Street to the south, and West Pratt Street to the north. The neighborhood acquired its name during the second half of the 19th century, when the area was the site of butcher shops and meat packing plants to process pigs transported from the Midwest on the B&O Railroad; they were herded across Ostend and Cross Streets to be slaughtered and processed.
There are more than 1,500 properties and districts listed on the National Register of Historic Places in the U.S. State of Maryland. Each of the state's 23 counties and its one county-equivalent has at least 20 listings on the National Register.
St. Charles College was a minor seminary in Catonsville, Maryland, originally located in Ellicott City, Maryland.
The Bollman Truss Railroad Bridge across the Little Patuxent River at Savage, Maryland, is one of the oldest standing iron railroad bridges in the United States and the sole surviving example of a revolutionary design in the history of American bridge engineering. The 160-foot (48.8 m) double-span was built in 1852 at an unknown location on the main line of the Baltimore and Ohio Railroad. It was moved 35 years later to its present location, where it replaced the very first Bollman bridge. Today, it carries the Savage Mill Trail.
The Thomas Viaduct spans the Patapsco River and Patapsco Valley between Relay, Maryland and Elkridge, Maryland, USA. It was commissioned by the Baltimore and Ohio Railroad (B&O); built between July 4, 1833, and July 4, 1835; and named for Philip E. Thomas, the company's first president. Some claim it to be the world's oldest multiple arched stone railroad bridge. However, the Sankey Viaduct on the Liverpool and Manchester Railway was opened in 1830 and finally completed in 1833.
The Patterson Viaduct was built by the Baltimore and Ohio Railroad (B&O) as part of its Old Main Line during May to December 1829. The viaduct spanned the Patapsco River at Ilchester, Maryland. It was heavily damaged by a flood in 1868 and subsequently replaced with other structures. In 2006, it was restored to limited service when a footbridge was built atop the surviving arch and abutments.
Tunkhannock Creek Viaduct is a concrete deck arch bridge on the Nicholson Cutoff rail line segment of the Norfolk Southern Railway Sunbury Line that spans Tunkhannock Creek in Nicholson, Pennsylvania. Measuring 2,375 feet (724 m) long and towering 240 feet (73.15 m) when measured from the creek bed, it was the largest concrete structure in the world when completed in 1915 and still merited "the title of largest concrete bridge in America, if not the world" 50 years later.
Baltimore and Ohio Railroad Martinsburg Shops is a historic industrial district in Martinsburg, West Virginia. It is significant both for its railroading architecture by Albert Fink and John Rudolph Niernsee and for its role in the Great Railroad Strike of 1877. It consists of three contributing buildings, one of which is the oldest covered roundhouse in the United States. The presence of the Baltimore and Ohio Railroad Company in Martinsburg dates back to the late 1840s, when the first engine and machine shops were erected for the expanding company.
The Baltimore and Ohio Ellicott City Station Museum in Ellicott City, Maryland, is the oldest remaining passenger railway station in the United States, and one of the oldest in the world. It was built in 1830 as the terminus of the Baltimore and Ohio Railroad line from Baltimore to the town then called Ellicott's Mills, and a facility to service steam locomotives at the end of the 13-mile (21 km) run. The station, a National Historic Landmark, is now used as a museum.
Mount Clare, also known as Mount Clare Mansion and generally known today as the Mount Clare Museum House, is the oldest Colonial-era structure in the City of Baltimore, Maryland, U.S.A. The Georgian style of architecture plantation house exhibits a somewhat altered five-part plan. It was built on a Carroll family plantation beginning in 1763 by barrister Charles Carroll the Barrister, (1723–1783), a descendant of the last Gaelic Lords of Éile in Ireland and a distant relative of the much better-known Charles Carroll of Carrollton, (1737–1832), longest living signer of the Declaration of Independence and the richest man in America in his later years, also the layer of the First Stone of the new Baltimore and Ohio Railroad, just a short distance away in 1828.
The B & O Railroad Potomac River Crossing is a 15-acre (6.1 ha) historic site where a set of railroad bridges, originally built by the Baltimore and Ohio Railroad, span the Potomac River between Sandy Hook, Maryland and Harpers Ferry, West Virginia. The site was added to the National Register of Historic Places on February 14, 1978, for its significance in commerce, engineering, industry, invention, and transportation.
The Mount Clare Shops is the oldest railroad manufacturing complex in the United States, located in Baltimore, Maryland. It was founded by the Baltimore and Ohio Railroad (B&O) in 1829. Mt. Clare was the site of many inventions and innovations in railroad technology. It is now the site of the B&O Railroad Museum. The museum and Mt. Clare station were designated a National Historic Landmark in 1961.
The Baltimore Terminal Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Maryland. The line runs from Baltimore to Halethorpe along the original Baltimore and Ohio Railroad (B&O) line, one of the oldest rail lines in the United States and the first passenger railroad line. At its east (north) end, it connects with the Philadelphia Subdivision; its west (south) end has a junction with the Capital Subdivision and the Old Main Line Subdivision.
"Mount 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. 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.
The Hockley Forge and Mill are a collection of colonial-era industrial buildings along the Patapsco River near modern Elkridge, Maryland. Located at the river's head of navigation, the site is a flat section of land along the Patapsco River valley with steep embankments on either side. At its 19th-century peak, the site held more than 30 industrial buildings.
