The Carrollton Viaduct, spans the

Gwynns Falls Gwynns Falls is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed April 1, 2011. stream located in Baltimore County, Maryland, Baltimore County and Baltimore, Baltimore City, Maryland. It ...

stream near Carroll Park in southwest

Baltimore, Maryland Baltimore is the List of municipalities in Maryland, most populous city in the U.S. state of Maryland. With a population of 585,708 at the 2020 United States census, 2020 census and estimated at 568,271 in 2024, it is the List of United States ...

, USA. It is the first stone

masonry Masonry is the craft of building a structure with brick, stone, or similar material, including mortar plastering which are often laid in, bound, and pasted together by mortar (masonry), mortar. The term ''masonry'' can also refer to the buildin ...

bridge for

railroad Rail transport (also known as train transport) is a means of transport using wheeled vehicles running in railway track, tracks, which usually consist of two parallel steel railway track, rails. Rail transport is one of the two primary means of ...

use in the United States and was built for the

Baltimore and Ohio Railroad The Baltimore and Ohio Railroad was the oldest railroads in North America, oldest railroad in the United States and the first steam engine, steam-operated common carrier. Construction of the line began in 1828, and it operated as B&O from 1830 ...

, founded in 1827. Construction began in 1828 and was completed in 1829. It remains the oldest such bridge still in service in the United States. The bridge is named in honor of

Charles Carroll of Carrollton Charles Carroll (September 19, 1737 – November 14, 1832), known as Charles Carroll of Carrollton or Charles Carroll III, was an American politician, planter, and signatory of the Declaration of Independence. He was the only Catholic signatory ...

(1737–1832), of

Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east ...

, known for being the last surviving signer of the

Declaration of Independence A declaration of independence is an assertion by a polity in a defined territory that it is independent and constitutes a state. Such places are usually declared from part or all of the territory of another state or failed state, or are breaka ...

, the only

Roman Catholic The Catholic Church (), also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institut ...

in the

Second Continental Congress The Second Continental Congress (1775–1781) was the meetings of delegates from the Thirteen Colonies that united in support of the American Revolution and American Revolutionary War, Revolutionary War, which established American independence ...

(1775–1781), and wealthiest man in the

Thirteen Colonies The Thirteen Colonies were the British colonies on the Atlantic coast of North America which broke away from the British Crown in the American Revolutionary War (1775–1783), and joined to form the United States of America. The Thirteen C ...

of the time of the

American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which Am ...

(1775–1783). In 1971, the Carrollton Viaduct was designated a National Historic Landmark and listed on the National Register of Historic Places. It was designated a

National Historic Civil Engineering Landmark __NOTOC__ The following is a list of Historic Civil Engineering Landmarks as designated by the American Society of Civil Engineers since it began the program in 1964. The designation is granted to projects, structures, and sites in the United Stat ...

by the

American Society of Civil Engineers The American Society of Civil Engineers (ASCE) is a tax-exempt professional body founded in 1852 to represent members of the civil engineering profession worldwide. Headquartered in Reston, Virginia, it is the oldest national engineering soci ...

in 1982 and is now owned and operated by

CSX Transportation CSX Transportation , known colloquially as simply CSX, is a Class I freight railroad company operating in the Eastern United States and the Canadian provinces of Ontario and Quebec. Operating about 21,000 route miles () of track, it is the lead ...

Description

The bridge is currently one of the world's oldest railroad bridges still in use for rail traffic, carrying loads far greater than originally envisioned. It was named after

(1737–1832), the last living signer of the

and a director of the

, who laid the

cornerstone A cornerstone (or foundation stone or setting stone) is the first stone set in the construction of a masonry Foundation (engineering), foundation. All other stones will be set in reference to this stone, thus determining the position of the entir ...

on July 4, 1828. As he laid the first stone he said, "I consider this among the most important acts of my life, second only to my signing the Declaration of Independence." Builder Caspar Wever and designer James Lloyd completed the structure for the railroad in November 1829, at an officially listed cost of $58,106.73 (equal to $ today). The actual cost of the construction may have been as high as $100,000. The bridge, 312 feet (95 m) in length, rises from its foundations about . It is above Gwynns Falls. It consists of a full-centered arch with a clear span length of over the stream, and a space for two railroad tracks on its deck. To provide an underpass for a wagon road, an arched passageway, in width, was built through one of the masonry-walled approaches. Originally planned as one arch of chord, the dimensions were enlarged to quiet the concern of the proprietor of the mills located immediately above the bridge site, who feared that 40 feet would be insufficient if the stream was flooded. The heavy

granite Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly coo ...

blocks which form the arches and exterior walls were procured from Ellicott's Mills and Port Deposit. A temporary wooden framework supporting the central span held 1,500 tons (1,360 tonnes) of this stone during construction. A white cornerstone at one end of the bridge bears the inscription "James Lloyd of Maryland, Builder A.D. 1829."

Andrew Jackson Andrew Jackson (March 15, 1767 – June 8, 1845) was the seventh president of the United States from 1829 to 1837. Before Presidency of Andrew Jackson, his presidency, he rose to fame as a general in the U.S. Army and served in both houses ...

, the first President of the United States to ride on a railroad train, crossed the bridge on a trip between Ellicott's Mills and Baltimore on June 6, 1833. The Carrollton Viaduct has provided continual service to the Baltimore and Ohio Railroad and its modern corporate successor,

. The

viaduct A viaduct is a specific type of bridge that consists of a series of arches, piers or columns supporting a long elevated railway or road. Typically a viaduct connects two points of roughly equal elevation, allowing direct overpass across a wide ...

was designated a

National Historic Landmark A National Historic Landmark (NHL) is a National Register of Historic Places property types, building, district, object, site, or structure that is officially recognized by the Federal government of the United States, United States government f ...

on November 11, 1971 and was administratively listed on the

National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...

the same day. In 1982 the viaduct was designated a

by the

References

;Notes ;Works cited * * "Significance" section.

External links

American Society of Civil Engineers - Carrollton Viaduct
* * *, including photo, at Maryland Historical Trust {{NRHP bridges 1829 establishments in Maryland Bridges completed in 1829 1820s in Baltimore Baltimore and Ohio Railroad bridges Bridges in Baltimore Crossings of the Patapsco River CSX Transportation bridges Historic American Engineering Record in Baltimore Historic Civil Engineering Landmarks National Historic Landmarks in Maryland Railroad bridges in Maryland Railroad bridges on the National Register of Historic Places in Maryland Viaducts in the United States Railroad-related National Historic Landmarks National Register of Historic Places in Baltimore County, Maryland Stone arch bridges in the United States

Description

See also

References

Further reading

External links