Baltimore and Ohio Railroad


The Baltimore and Ohio Railroad was the first common carrier railroad and the oldest railroad in the United States, with its first section opening in 1830. Merchants from the city of Baltimore, which had benefitted to some extent from the construction of the National Road early in the century, wanted to continue to compete for trade with trans-Appalachian settlers with the newly constructed Erie Canal, another canal being proposed by Pennsylvania, the Chesapeake and Ohio Canal, and the James River Canal, which directed traffic toward Richmond and Norfolk, Virginia. At first the B&O was located entirely in the state of Maryland, its original line extending from the port of Baltimore west to Sandy Hook.
Because of competition with the C&O canal for trade with coal fields in western Maryland, it could not use the C&O right of way. Thus, to continue westward while minimizing high-cost track through the Appalachian Mountains, the B&O chose to cross the Potomac River into Virginia, near the confluence of the Potomac and Shenandoah rivers. From there track continued through Virginia from Harpers Ferry to a point just west of the junction of Patterson Creek and the North Branch Potomac River, where it crossed back into Maryland to reach Cumberland, the terminus of the National Road. From there the B&O extended to the Ohio River at Wheeling and a few years later also to Parkersburg, West Virginia. It proved crucial to Union success during the American Civil War, although the conflict also caused considerable damage. After the war's end, the B&O consolidated several feeder lines in Virginia and West Virginia, as well as expanded westward into Ohio, Indiana and Illinois. B&O advertising later carried the motto: "Linking 13 Great States with the Nation."
After several mergers, the B&O became part of the CSX Transportation network. The B&O also includes the Leiper Railroad, the first permanent horse-drawn railroad in the U.S. At the end of 1970, the B&O operated 5,552 miles of road and 10,449 miles of track, not including the Staten Island Rapid Transit or the Reading and its subsidiaries. It includes the oldest operational railroad bridge in the United States.
When CSX established the B&O Railroad Museum as a separate entity from the corporation, it donated some of the former B&O Mount Clare Shops in Baltimore, including the Mt. Clare roundhouse, to the museum, while selling the rest of the property. The B&O Warehouse at the Camden Yards rail junction in Baltimore now dominates the view over the right-field wall at the Baltimore Orioles' current home, Oriole Park at Camden Yards.
Part of the B&O Railroad's immortality has come from being one of the four featured railroads on the U.S. version of the board game Monopoly; it is the only railroad on the board that did not directly serve Atlantic City, New Jersey.

History

The fast-growing port city of Baltimore, Maryland, faced economic stagnation unless it opened routes to the western states, as New York had done with the Erie Canal in 1820. On February 27, 1827, twenty-five merchants and bankers studied the best means of restoring "that portion of the Western trade which has recently been diverted from it by the introduction of steam navigation." Their answer was to build a railroad—one of the first commercial lines in the world.
Their plans worked well, despite many political problems from canal backers and other railroads. The railroad grew from a capital base of $3 million in 1827 to a large enterprise generating $2.7 million of annual profit on its of track in 1854, with 19 million passenger miles. The railroad fed tens of millions of dollars of shipments to and from Baltimore and its growing hinterland to the west, thus making the city the commercial and financial capital of the region south of Philadelphia.

Charters

Two men — Philip E. Thomas and George Brown — were the pioneers of the railroad. They spent the year 1826 investigating railway enterprises in England, which were at that time being tested in a comprehensive fashion as commercial ventures. Their investigation completed, they held an organizational meeting on February 12, 1827, including about twenty-five citizens, most of whom were Baltimore merchants or bankers., passed February 28, 1827, and the Commonwealth of Virginia on March 8, 1827, chartered the Baltimore and Ohio Rail Road Company, with the task of building a railroad from the port of Baltimore west to a suitable point on the Ohio River. The railroad, formally incorporated April 24, was intended to provide a faster route for Midwestern goods to reach the East Coast than the hugely successful but slow Erie Canal across upstate New York. Thomas was elected as the first president and Brown the treasurer. The capital of the proposed company was fixed at five million dollars,
but the B&O was initially capitalized in 1827 with a three million dollar issue of stock. Virtually every citizen of Baltimore owned a share, as the offering was oversubscribed.

Early construction and legal battles

Construction began on July 4, 1828, when Charles Carroll of Carrollton performed the groundbreaking by laying the cornerstone. The initial tracks were built with granite stringers topped by strap iron rails. The first section, from Baltimore west to Ellicott's Mills, opened on May 24, 1830. A horse pulled the first cars 26 miles and back, since the B&O did not decide to use steam power for several years. Railroad men in South Carolina had earlier commissioned a steam locomotive from a New York foundry, while the B&O was still experimenting with horse power and sails. The B&O's first locomotive, the "Tom Thumb", was made in America and would pull passenger and freight cars at 18 miles per hour.
Developers decided to follow the Patapsco River to a point near Parr's Ridge, where the railroad would cross a height of land and descend into the valley of the Monocacy and Potomac rivers. Further extensions opened to Frederick on December 1, 1831; Point of Rocks on April 2, 1832; and Sandy Hook on December 1, 1834. The connection to the Winchester and Potomac Railroad at Harpers Ferry opened in 1837, then the line to Martinsburg in May 1842; Hancock in June 1842; Cumberland on November 5, 1842; Piedmont on July 21, 1851, and Fairmont on June 22, 1852. The B&O reached Wheeling, West Virginia on January 1, 1853. That would remain the terminus through the American Civil War until a railroad bridge could be constructed across the Ohio River.
The narrow strip of available land along the Potomac River from Point of Rocks to Harpers Ferry caused years of legal battles between the B&O and the Chesapeake and Ohio Canal, as both sought to exclude the other from its use. A compromise eventually allowed the two companies to share the right of way. The B&O also prevailed in a lawsuit against it by the Washington and Baltimore Turnpike Road.
The B&O wanted links to Virginia's Shenandoah Valley, as well as the parts of western Virginia draining into the Ohio River valley and ultimately the Mississippi River, such as Wheeling and the Kanawha River valley. However, many Virginia politicians wanted the minerals, timber and produce of those areas to instead ship through Richmond and reach the Atlantic through Norfolk, although the James River Canal required substantial maintenance and was never completed through the Appalachians to the Ohio River watershed. Thus, while the B&O reached Wheeling in 1853, political compromises meant the B&O would only reach Grafton to connect to Parkersburg on the Ohio River through a connection with the Northwestern Virginia Railroad which was completed in 1857. During the "Great Railway Celebrations of 1857", a large group of notables boarded the B&O in Baltimore, then transferred to steamboats in Wheeling to Marietta, Ohio, where they boarded a railroad to Cincinnati, where after another celebration, they boarded the Ohio and Mississippi Railroad, which brought them to St. Louis, Missouri, three days after they had started their journey. The B&O would only reach Charleston and ultimately Huntington on the Ohio River more than a decade after the American Civil War and the creation of the state of West Virginia.
Meanwhile, the State of Maryland granted the B&O a charter to build a line from Baltimore to Washington, D.C., in 1831, and the Washington Branch was opened in 1835. This line joined to the original mainline at Relay, Maryland, crossing the Patapsco River on the Thomas Viaduct. This line was partially funded by the state of Maryland, and was operated separately until the 1870s, with Maryland receiving a 25 percent cut of gross passenger receipts. The B&O's charter also forbad further taxation of the railroad, and that no-tax provision was upheld in the 1840s after Baltimore City tried to tax it. This Washington Branch line was built in stone, much like the original mainline. By this time, however, strap rail was no longer used for new construction. Most of the stone bridges on the Old Main Line did not last long, being washed out by the periodic flooding of the Patapsco River and replaced at first by Bollman Truss bridges. The Annapolis and Elk Ridge Railroad to Annapolis connected to this line at Annapolis Junction in 1840. As an unwritten condition for the charter, it was understood that the state of Maryland would not charter any competing line between Baltimore and Washington, and no such charters were approved until well after the American Civil War, when the Pennsylvania Railroad acquired a railroad on the Delmarva Peninsula, which had the power to build short branch lines, so it was able to connect to Washington through Bowie, Maryland.
The B&O also wanted access to Pittsburgh and coal fields in western Pennsylvania and Ohio. Although the directors of the Pennsylvania Railroad wanted a monopoly in their state, delays in laying track to Pittsburgh led the Pennsylvania legislature in 1846 to require construction to be completed within 10 years, else competition would be allowed. The Pennsylvania Railroad finished its trans-Allegheny track with two years to spare, thus the B&O would only be able to extend its tracks up the Youghiogheny River valley to the soft coal fields in 1871.

Early engineering

When construction began on the B&O in the 1820s, railroad engineering was in its infancy. Unsure exactly which materials would suffice, the B&O erred on the side of sturdiness and built many of its early structures of granite. Even the track bed to which iron strap rail was affixed consisted of the stone.
Though the granite soon proved too unforgiving and expensive for track, most of the B&O's monumental bridges have survived to this day, and many are still in active railroad use by CSX. Baltimore's Carrollton Viaduct, named in honor of Charles Carroll of Carrollton, was the B&O's first bridge, and is the world's second-oldest railroad bridge still carrying trains. The Thomas Viaduct in Relay, Maryland, was the longest bridge in the United States upon its completion in 1835. It also remains in use. The B&O made extensive use of the Bollman iron truss bridge design in the mid-19th century. Its durability and ease of assembly aided faster railroad construction.
As the B&O built the main line west to Parrs Ridge, it had limited information about the operation of steam locomotives. Consequently, the company was uncertain if the engine's metal wheels would grip the metal rails sufficiently to pull a train up to the top of the ridge. The railroad decided to construct two inclined planes on each side of the ridge along which teams of horses, and perhaps steam-powered winches, would assist pulling the trains uphill. The planes, about a mile long on each side of the ridge, quickly proved an operational bottleneck. Before the decade of the 1830s ended, the B&O built a alternate route that became known as the Mount Airy Loop. The planes were quickly abandoned and forgotten, though some artifacts survive to the present.
See also Old Main Line Subdivision

First telegraph line

In 1843, Congress appropriated $30,000 for construction of an experimental telegraph line between Washington, D.C., and Baltimore along the B&O's right-of-way. The B&O approved the project with the agreement that the railroad would have free use of the line upon its completion. An impressive demonstration occurred on May 1, 1844, when news of the Whig Party's nomination of Henry Clay for U.S. President was telegraphed from the party's convention in Baltimore to the Capitol Building in Washington. On May 24, 1844, the line was officially opened as Samuel F. B. Morse sent his famous words, "What hath God wrought", from the B&O's Mount Clare station to the Capitol by telegraph.

Innovations

Contrary to legend, the B&O was not the first chartered railroad in the United States; John Stevens obtained a charter for the New Jersey Railroad in 1815. The B&O was, however, the first company to operate a locomotive built in America, with the "Tom Thumb" in 1829. It built the first passenger and freight station and was the first railroad to earn passenger revenues in December 1829, and publish a timetable on May 23, 1830. On Christmas Eve 1852, the B&O line was completed between Baltimore and the Ohio River near Moundsville, West Virginia.

Conflicts in the early years

Partial government ownership caused some operational problems. Of the thirty members on its board of directors, twelve were elected by shareholders, while eighteen were appointed either by Maryland or the Baltimore City Council. Many had conflicting interests: the directors appointed by the state and city desired low fares and all construction to be funded from corporate revenues, while the directors elected by shareholders desired greater profits and dividends. These conflicts became more intense in the 1850s after the completion of the C&O Canal, which brought additional competition to the B&O. In 1853, after being nominated by large shareholder and director Johns Hopkins, John W. Garrett became president of the B&O, a position he would hold until his death in 1884. In the first year of his presidency, corporate operating costs were reduced from 65 percent of revenues to 46 percent, and the railroad began distributing profits to its shareholders.
Partial governmental ownership also produced rapid responses when abolitionists stopped the eastbound night express train during John Brown's raid on the federal arsenal at Harpers Ferry, Virginia. Both station master Fontaine Beckham and porter Hayward Sheppard received mortal wounds in the skirmish, although Engineer William McKay was able to back up the train and leave the station, and raiders permitted them to continue their run to Baltimore after daylight. After confirming that reports of the raid were not a hoax, Garrett telegraphed President James Buchanan, as well as the Governors of Maryland and Virginia, and Maryland Militia General George Hume Steuart about the insurrection in progress. The 3:20 p.m. B&O train left Washington Depot with 87 U.S. Marines and two howitzers, and the 3:45 p.m. train from nearer Frederick, Maryland, carried three Maryland militia companies under Col. Edward Shriver, who soon offered their services at Harpers Ferry to the ranking Virginia militia officer, Col. R. W. Baylor. Soon Garret's Master of Transportation William Prescott Smith left Baltimore City together with Maryland Gen. Charles G. Egerton Jr. and the Second Light Brigade, which train also picked up the Marines on the federal troop train at Relay, Maryland. All awaited Lt.Col. Robert E. Lee and Lt. J.E.B. Stuart, who had received orders from the Secretary of War, to lead the capture of the insurgent abolitionists including John Brown.

American Civil War

At the outset of the Civil War, the B&O possessed 236 locomotives, 128 passenger coaches, 3,451 rail cars and of rail road, all in states south of the Mason–Dixon line, as Garrett had noted before the war began. Although many Marylanders had Southern sympathies, Garrett and Hopkins supported the Union. The B&O became crucial to the Federal government during the Civil War, being the main rail connection between Washington, D.C., and the northern states, especially west of the Appalachian mountains.
However, its initial problem became Lincoln's first Secretary of War, Simon Cameron, a major stockholder in the rival North Central Railroad, which received long haul freight destined for Baltimore from the rival Pennsylvania Railroad. Furthermore, the Pennsylvania Railroad and other investors sought permission to construct rail lines which threatened the B&O's monopolies on the Washington Branch and westward through Cumberland, Maryland. Raids and battles during the war also cost the B&O substantial losses, many never indemnified. Master of Transportation Prescott Smith kept a diary during the war years, describing incidents such as the June 1861 derailment of a 50 car coal train, which plunged into a ravine after a bridge was destroyed, as well as later ironclad trains.

1861–1862

On April 18, 1861, the day after Virginia seceded from the Union, Virginia militia seized the federal arsenal at Harpers Ferry, which was also an important work station on the B&O's main westward line. The following day, Confederate rioters in Baltimore attempted to prevent Pennsylvania volunteers from proceeding from the North Central Railway's Bolton station to the B&O's Mount Clare station, and Maryland's governor Hicks and Baltimore Mayor George W. Brown ordered 3 North Central and 2 Philadelphia, Wilmington and Baltimore Railroad bridges destroyed to prevent further federal troop movements through the city. Soon B&O president John Work Garrett received letters from Virginia's Governor John Letcher telling the B&O to pass no federal troops destined for any place in Virginia over the railroad, and threatening to confiscate the lines. Charles Town's mayor also wrote, threatening to cut the B&O's main line by destroying the long bridge over the Potomac River at Harpers Ferry, and Garrett also received anonymous threats. Thus he and others asked Secretary of War Cameron to protect the B&O as the national capitol's main westward link. Cameron instead warned Garrett that passage of any rebel troops over his line would be treason. The Secretary of War agreed to station troops to protect the North Central, the Pennsylvania Railroad and even the PW&B, but flatly refused to help the B&O.
The B&O had to repair damaged line at its own expense, and often received late or no payment for services rendered to the federal government. In May, CSA Colonel Jackson's operations against the B&O Railroad began. Stonewall Jackson initially permitted B&O trains to operate during limited hours over the approximately 100 miles from Point of Rocks to Cumberland. On June 20, 1861, Jackson's Confederates seized Martinsburg, a major B&O work center, having had blown up the Harpers Ferry railroad bridge on June 14. Confederates confiscated dozens of locomotives and train cars and ripped up double track in order to ship rails for Confederate use in Virginia. By the end of 1861, 23 B&O railroad bridges had been burned and of track were torn up or destroyed.
Since Jackson cut the B&O main line into Washington for more than six months, the North Central and Pennsylvania Railroads profited from overflow traffic, even as many B&O trains stood idle in Baltimore. Garret tried to use his government contacts to secure the needed protection, from Maryland Delegate Reverdy Johnson to General George McClellan and Treasury Secretary Salmon P. Chase. As winter began, coal prices soared in Washington, even though the B&O in September arranged for free coal transport from its Cumberland, Maryland, terminal down the C&O Canal. Furthermore, western farmers could not get their produce to markets because of the B&O shutdown, only partially alleviated by the summer 1861 Union army victories at the Battle of Philippi and Rich Mountain, and vigorous army and company work crews which reduced the main line gap to 25 miles between Harpers Ferry and Back Creek.
Finally at year end, Samuel M. Felton, the PW&B President, wrote newspapers about the War Department's discrimination against his cooperating railroad line, which competed with Cameron's favored North Central and Pennsylvania Railroads. President Lincoln in January 1862 replaced Cameron with Pennsylvania lawyer Edwin M. Stanton, who had been serving as Cameron's legal advisor. Furthermore, on January 31, 1862 Congress passed the Railways and Telegraph Act of January 31, 1862, creating the United States Military Railroad and allowing it to seize and operate any railroad or telegraph company's equipment, although Stanton and USMRR Superintendent Daniel McCallum would take a "team of rivals" approach to railroad management and allow civilian operations to continue. In February 1862, Union forces recaptured Martinsburg and Harpers Ferry, and work crews continued replacing wrecked bridges and equipment, although bushwhacker raids continued.
Even then train movements were sporadic and subject to frequent stoppages, derailments, capture and attack. Prominent raids on the B&O railroad during this period were:
The second half of the Civil War was characterized by near continuous raiding, which severely hampered the Union defense of Washington, D.C. Union forces and leaders often failed to properly secure the region, despite the B&O's vital importance to the Union cause.
This military strategy, or lack thereof, allowed Confederate commanders to contribute significantly to the length of the war, by conducting free-ranging military operations against the region and railroad.
Before the Battle of Monocacy, B&O agents began reporting Confederate troop movements eleven days prior to the battle, and Garrett had their intelligence passed to authorities in the War Department and to Major General Lew Wallace, who commanded the department responsible for defense of the area. As preparations for the battle progressed, the B&O provided transport for federal troops and munitions, and on two occasions Garrett was contacted directly by President Abraham Lincoln for further information. Though Union forces lost this battle, the delay allowed Ulysses S. Grant to successfully repel the Confederate attack on Washington at the Battle of Fort Stevens two days later. After the battle, Lincoln paid tribute to Garrett as:
The Confederate leaders who led these operations and specifically targeted the railroad included:
Bases of operation involved in raiding the B&O Railroad:
A steel and stone bridge was built across the Ohio River between Bellaire, Ohio, and Wheeling, West Virginia, in 1871, connecting the B&O to the Central Ohio Railroad, which the B&O had leased starting in 1866. This provided a direct rail connection to Columbus, Ohio, and the lease marked the beginning of a series of expansions to the west and north.
Other railroads included in the B&O were:
, during strike in 1877
The Chicago and Alton Railroad was purchased by the B&O in 1931 and renamed the Alton Railroad. It was always operated separately and was eventually bought by the Gulf, Mobile and Ohio Railroad after receivership in 1942.

Great Railroad Strike of 1877

As a result of poor national economic conditions in the mid-1870s following the Panic of 1873, the B&O attempted to reduce its workers' wages. After a second reduction in wages was announced in the same year, workers began the Great Railroad Strike of 1877 on July 14 in Martinsburg, West Virginia. Striking workers would not allow any of the trains, mainly freight trains, to roll until this third wage cut was revoked. West Virginia Governor Henry M. Mathews sent in state militia units to restore train service but the soldiers refused to fire on the strikers. The strike spread to Cumberland, and when Maryland Governor John Lee Carroll attempted to put down the strike by sending the state militia from Baltimore, riots broke out resulting in 11 deaths, the burning of parts of Camden station, and damage to several engines and cars. The next day workers in Pittsburgh staged a sympathy strike that was also met with an assault by the state militia; Pittsburgh then erupted into widespread rioting. The strike ended after federal troops and state militias restored order.

New lines in Maryland

In 1866 the B&O began constructing the Metropolitan Branch west out of Washington, which was completed in 1873 after years of erratic effort. Before this line was laid, rail traffic west of Washington had to travel first to Relay or Baltimore before joining the main line. The line cut a more or less straight line from Washington to Point of Rocks, Maryland, with many grades and large bridges. Upon the opening of this line, through passenger traffic was rerouted through Washington, and the Old Main Line from Point of Rocks to Relay was reduced to secondary status as far as passenger service was concerned. The Washington to Gaithersburg section of the Met Branch was double-tracked during 1886–1893. Rebuilding in the early 20th century and complete double tracking of the branch by 1928 increased capacity; the "branches" became the de facto mainline, though the Old Main Line was retained as a relief route.
Meanwhile, the Pennsylvania Railroad outmaneuvered the B&O to acquire the B&O's northern connection, the Philadelphia, Wilmington and Baltimore Railroad in the early 1880s, cutting off the B&O's access to Philadelphia and New York. The state of Maryland had stayed true to its implicit promise not to grant competing charters for the Baltimore/Washington line, but when a charter was granted in 1860 to build a line from Baltimore to Pope's Creek in southern Maryland, lawyers for the Pennsylvania RR picked up on a clause in the unfulfilled charter allowing branches up to long, from any point and in any direction. The projected route, passing through what is now Bowie, Maryland, could have a "branch" constructed that would allow service into Washington. The Pennsylvania picked up the charter through the agency of the Baltimore and Potomac Railroad and in 1872 service between Baltimore and Washington began. At the same time the PRR outmaneuvered the B&O and took control of the Long Bridge across the Potomac River into Virginia, the B&O's connection to southern lines.
In response, the B&O chartered the Philadelphia Branch in Maryland and the Baltimore and Philadelphia Railroad in Delaware and Pennsylvania and built a parallel route, finished in 1886. The 10th president, Charles F. Mayer, spearheaded the development of the Baltimore Belt Line, which opened in 1895, and recruited engineer Samuel Rea to design it. This belt line connected the main line to the Philadelphia Branch without the need for a car ferry across the Patapsco River, but the cost of constructing the Howard Street Tunnel drove the B&O to bankruptcy in 1896.
Two other lines were built in attempts to reconnect to the south. The Alexandria Branch was built in 1874, starting from Hyattsville, Maryland, and ending at a ferry operation at Shepherd's Landing. The ferry operation continued until 1901 when the trackage rights agreement concluded as part of the construction of Washington Union Station saw the south end of the branch realigned to link to the PRR trackage in Anacostia, across the Anacostia Railroad Bridge, into the Virginia Avenue Tunnel, through Southwest Washington, D.C., to Potomac Yard in Alexandria, Virginia. The Alexandria Branch trackage to Shepherd's Landing was heavily used during World War II when traffic congestion on the Long Bridge caused the U.S. Army Corps of Engineers to construct a bridge along the original plan of the B&O: Alexandria to Shepherd's Landing, Washington. Trains of empty freight cars were routed north and south over the structure, which was demolished after the end of World War II.
Before either connection was made, however, another branch was built around the west side of Washington. During the 1880s the B&O had organised a group of bankrupt railroads in Virginia into the Virginia Midland Railroad. The VM track ran from Alexandria to Danville, Virginia. The line projected west across the Potomac River was intended to cross the Potomac just north of the D.C. line, to continue southwest to a connection with the B&O-controlled Virginia Midland in Fairfax, and if possible to a connection with the Richmond, Fredericksburg and Potomac Railroad in Quantico. The branch was started in 1892 and reached Chevy Chase, Maryland, the same year. Financial problems in both the VM and B&O forced a halt to construction and led to the B&O's loss of control of the VM. Following bankruptcy, and control by the Pennsylvania Railroad, by the time the line was completed in 1910 there was no longer any point to the river crossing. Thus, the renamed Georgetown Branch came to serve a wide range of customers in Maryland and in Georgetown, such as the Potomac Electric Power Company, the Washington Milling Company, and the U.S. government. The line cut directly across various creeks, and includes what was said to be the longest wood trestle on the railroad over Rock Creek; and a short tunnel, Dalecarlia Tunnel, under the Washington Aqueduct. The line was almost completely abandoned in 1986 by CSX and is presently used in part as the right-of-way for the Capital Crescent Trail.
After a flood damaged the C&O Canal in 1877, the B&O acquired a majority interest in the canal mainly to keep its property and right of way from potential use by the Western Maryland Railroad. The canal was operated by the B&O until 1924 when it was damaged in another flood. The canal's property was later transferred to the U.S. government in 1938 in consideration for obtaining a loan from the federal Reconstruction Finance Corporation.
In 1895 the B&O introduced electric locomotives over of line near Camden, initially using an overhead electric slot system.

The 20th century

Following its emergence from bankruptcy, control of the B&O was acquired by the Pennsylvania Railroad in 1901. A rising young PRR Vice President, Leonor F. Loree, was appointed President. Loree shared the Pennsy management's belief in infrastructure and the B&O at that time needed some of that. New classes of engines were built to haul longer, heavier trains faster. The Old Main Line was reworked, sections of the original right-of-way cut off by the straightening of curves and replacement of old, weight-restricted bridges with newer, heavier bridges. Most of Loree's work on the B&O physical plant remains evident today. Many iron and steel bridges on the railroad were replaced with stone.
The railroad's passenger numbers were at a disadvantage with the railroad's major competitor in the northeast, the Pennsylvania Railroad. That railroad had a tunnel into Manhattan, thus carrying passengers directly into New York City. The B&O had no tunnel rights, and its New York City market trains actually terminated at the Central Railroad of New Jersey Terminal in Jersey City. From Philadelphia to Jersey City the B&O traveled over Reading Railroad tracks to Bound Brook and there joining Central Railroad of New Jersey tracks to Jersey City. Passengers rode CNJ ferries on B&O busses to Manhattan. Suffering from its weaker market position from Baltimore to New York, the B&O discontinued all passenger service north of Baltimore on April 26, 1958. On April 19, 1960, the railroad retired its last steam locomotive.
The Chesapeake and Ohio Railway took financial control of the B&O in 1963. The B&O already had a controlling interest in the Western Maryland Railway. In 1973 the three railroads were brought together under one corporate identity, the Chessie System, although they continued to operate as separate railroads. The Western Maryland was merged into the B&O in 1976. In 1980 the Chessie System and Seaboard Coast Line Industries, a holding company that owned the Seaboard Coast Line, the Louisville & Nashville, the Clinchfield, and the Georgia Railroad, agreed to form CSX Corporation. SCL Industries was renamed the Seaboard System Railroad in 1983, the same year that the Western Maryland Railway was completely absorbed into the B&O. SBD was renamed CSX Transportation in 1986. On April 30, 1987, the B&O's corporate existence ended when it was absorbed into the Chesapeake & Ohio Railway, which merged into CSX Transportation on August 31 of that year.
In railroading's golden age, the B&O was one of several trunk lines uniting the northeast quadrant of the United States into a wide industrial zone. It was the southern border as the New York Central was the northern border. The Pennsylvania Railroad controlled the center, and smaller roads like the Lackawanna, Lehigh Valley, and the Erie in the center surviving largely through the Interstate Commerce Commission. The corners of this map are Baltimore in the southeast, Boston in the northeast, Chicago in the northwest, and St. Louis in the southwest.
B&OSIRTBR&PCI&WD&UICV
19251945961585376315
1933121116
1944348029----
19602484015----
197028594?----

B&OSIRTBR&PCI&WD&UICV
19258786747140.0040.1
193343552
1944275881----
196053337----
197064?----

Branches

Mount Airy Branch

The Mount Airy Branch is the surviving, in-use portion of the 1839-opened Mount Airy Loop. The Loop had been mainline track
on the Old Main Line until superseded by the Mount Airy Cutoff and Tunnel in 1902.

Frederick Branch

The Frederick Branch was built from Frederick Junction, on the Old Main Line, to downtown Frederick. The 3.5 mile branch opened on December 1, 1831. In planning the route of the Old Main Line, the B&O decided against building the main line directly through Frederick, preferring instead to take advantage of a valley grade to the south of the city. The continuation of the main line from Frederick Junction opened April 2, 1832.

Metropolitan Branch

Connected Washington, D.C., to the Old Main Line at Point of Rocks. Constructed between 1866 and 1873, and originally single-tracked. Now called the Metropolitan Subdivision. Amtrak operates the daily Capitol Limited train between Washington, DC and Chicago along this branch; MTA Maryland operates weekday commuter rail service between Washington, DC and Martinsburg, WV.

Patuxent Branch

The Patuxent Branch was constructed in the 1880s and split off from the Washington Branch at Savage, Maryland, to serve a mill, a quarry, and other small industry. After 1925, the line was gradually cut back, and disconnected completely in 2005.

Georgetown Branch

The Georgetown Branch ran from a junction on the Metropolitan Branch north of the Silver Spring, Maryland, station to the Georgetown area of Washington, D.C. Built between 1892 and 1910. Originally intended as an extension of the railroad to a crossing of the Potomac River near the Chain Bridge, the agreement between the Pennsylvania Railroad and the B&O resulting from the rerouting of track for the Washington Union Station project put an end to the crossing, and the branch settled down to being just a country railroad until the Washington, D.C., suburbs grew around it. The branch was abandoned in 1986, and much of the right-of-way is now used by the Capital Crescent Trail. The State of Maryland is currently building a new light-rail transit line, the Purple Line, along much of the right-of-way between Bethesda and Silver Spring.
near Baltimore, the oldest passenger station in the U.S., is now a museum devoted the B&O's role in the Civil War.

Washington Branch

Original name for the line built between Baltimore and Washington, D.C., during 1833 to 1835. Now called the Capital Subdivision. Maryland Transit Administration operates weekday commuter rail service along this branch between Camden Station and Washington's Union Station.

Alexandria Extension

The Alexandria Extension was built from Hyattsville on the Washington Branch in 1874, ending at Shepherd's Landing. Now connects to the Anacostia Railroad Bridge through Washington, D.C., toward Virginia, serving as a bypass around Washington Union Station for freight trains.

Washington County Branch

The B&O had decided against a direct line to Hagerstown, though the city had petitioned the Directors. Several north–south routes like the Cumberland Valley built through Hagerstown and the construction of the Western Maryland Railway to that city persuaded the B&O management to build a branch. It was decided that the branch would leave the mainline at Weverton and wind its way through the hills of Western Maryland to Hagerstown. A station was constructed at the stub end of the line in downtown Hagerstown.

Baltimore & New York Railroad

The North Shore Branch of the Staten Island Railway was constructed from Cranford Junction on the Central Railroad of New Jersey, in Union County, New Jersey, New Jersey, east to St. George, Staten Island, New York, to give the B&O access to its own deepwater port and ferry terminal. The line no longer runs between Union Avenue and St George on Staten Island. Many attempts have been made to restore the North Shore Branch for passenger service, but have hit political, financial, or legal barriers.

Ohio River Branch

The Marietta & Cincinnati Railroad, later absorbed into the Baltimore & Ohio Railroad Southwest, included a stretch of track called the Ohio & Mississippi that stretched westward from Cincinnati to East St. Louis. "The O&M featured two branches, one south from North Vernon, Indiana, to Jeffersonville opposite of Louisville, Kentucky, on the Ohio River. The other was from Beardstown, Illinois, on the Illinois River to Shawneetown on the Ohio, which crossed the O&M main line at Flora."