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.
The Bloomington Viaduct spans the Northern Branch of the Potomac River connecting Bloomington, Maryland to Mineral County, West Virginia. The sandstone railroad bridge features three full center arches, each with a 56-foot (17 m) span and a 28-foot (8.5 m) rise. It is owned and operated by CSX Transportation on its Mountain Subdivision.
Copeland Bridge, also known as Copeland Farm Bridge or Copeland Covered Bridge is a wooden covered bridge over Beecher Creek in the town of Edinburg in Saratoga County, New York. It was built in 1879, and is a small, timber framed, queenpost truss bridge with a gable roof. It has a 30-foot span carried on fieldstone abutments.
The Casselman Bridge is a historic transportation structure on the Casselman River, located immediately east of Grantsville in Garrett County, Maryland. The bridge was built in 1813-1814 as part of the National Road. Historic markers posted at each end read:
Erected 1813 by David Shriver, Jr.,
Sup't of the "Cumberland Road". This 80 foot span
was the largest stone arch in America
at the time. It was continuously
used from 1813 to 1933.
The Fourpoints Bridge, near Emmitsburg, Maryland is a wrought iron bridge by the Wrought Iron Bridge Company of Canton, Ohio. The bridge crosses Toms Creek and is similar to the Poffenberger Road Bridge elsewhere in Frederick County. The 103-foot Pratt truss bridge remains in daily use.
The Loys Station Covered Bridge is a multiple king post wooden covered bridge near Thurmont, Maryland. The bridge was burned by an arsonist in 1991 and rebuilt using surviving framing. The original bridge spanned 90 feet in one span, but has since been modified with a pier at the middle of the span. The bridge crosses Owen's Creek and is surrounded by a park.
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 Poffenberger Road Bridge, near Jefferson, Maryland, is a wrought iron bridge by the Wrought Iron Bridge Company of Canton, Ohio. The bridge is similar to the Fourpoints Bridge elsewhere in Frederick County. The bridge is a single-span double-intersection Pratt truss. It was built circa 1878 and remains in daily use.
The Waverly Street Bridge, also called the Westernport Bowstring Arch Truss Bridge, was a historic steel bowstring truss bridge at Westernport, Allegany County, Maryland, United States. It carried vehicular traffic on Waverly Street over George's Creek. The bridge had a span length of 108 feet (33 m). It was built in 1892, by the King Bridge Company of Cleveland, Ohio.
Stanton's Mill is a historic grist mill complex located at Grantsville, Garrett County, Maryland, consisting of five interrelated buildings and structures. The Stanton's Mill building dates from about 1797. It is two stories and constructed of heavy timber frame with a gable roof; an addition was constructed in 1890. The complex includes a stone-faced, mid-19th-century timber crib dam and raceway, natural earthen tailrace, and a small, single-span stone arch bridge, dating to 1813, constructed as part of the National Road. Also on the property is a frame storage building, constructed about 1900.
The Bullfrog Road Bridge is a historic bridge between Emmitsburg, Frederick County and Taneytown, Carroll County in Maryland. The bridge crosses the Monocacy River on Bullfrog Road between the two counties. This bridge is a rare steel Parker through truss structure and is 183 feet in length and 16 feet-5 inches in width. It was built in 1908, by the York Bridge Company of York, Pennsylvania.
The Old Mill Road Bridge is a historic bridge near Rocky Ridge, Frederick County, Maryland, United States. The bridge spans Owens Creek southwest of Rocky Ridge on Old Mill Road. It is a Pratt half-hip through truss structure in a single span 69 feet (21 m) long and 16 feet (4.9 m). It was built in 1882 by the Pittsburgh Bridge Company, Pittsburgh, Pennsylvania.
The Roddy Road Covered Bridge is a small, one lane king post wooden covered bridge near Thurmont, Frederick County, Maryland. It crosses Owen's Creek near Thurmont. It is 40 feet long, 16 feet wide, with a 12 foot-8 inch clearance. It was built between 1850 and 1860.
The Crum Road Bridge is a historic bridge near Frederick, Frederick County, Maryland, United States. It spanned Israel Creek southeast of Walkersville. The bridge is an iron bowstring pony bridge that is 62 feet (19 m) in length and 15.8 feet (4.8 m) in width. The Crum Road Bridge was built on or about 1875, and was probably constructed by the King Iron Bridge Company of Cleveland, Ohio.
The Jericho Covered Bridge is a Burr arch through truss wooden covered bridge near Jerusalem, Harford County and Kingsville, Baltimore County, in Maryland, United States and near historic Jerusalem Mill Village. The bridge was constructed in 1865 across the Little Gunpowder Falls. This bridge is 88 feet (27 m) long and 14.7 feet (4.5 m) wide and is open to traffic.
The Gilpin's Falls Covered Bridge is a Burr arch through truss wooden covered bridge in Bay View, Cecil County, Maryland, United States, close to the town of North East. The bridge was constructed by local Cecil County bridgewright Joseph George Johnson in the autumn and winter of 1860-61 across North East Creek. The bridge was erected adjacent to and upstream of Samuel Gilpin's mills and dam and crosses the millpond formed by it. This bridge has a span of 100 feet (30 m) and a total length of 119 feet (36 m) with its shelter panel overhangs, is 13.5 feet (4.1 m) wide, and is closed to all vehicular traffic.
Ivory Mills is a 14-acre (5.7 ha), historic grist mill complex located at White Hall, Harford County, Maryland, United States. It consists of six standing 19th century frame buildings and structures: mill, miller's house, barn, corncrib, carriage house, and chicken house. The property also includes the ruins of a stone spring house, and the stone abutments of a frame, Federal-era covered bridge. The focus of the complex is the three-story stone and frame mill building built about 1818. The ground story is constructed of coursed stone rubble and the upper stories are clapboard. The family first started a mill on this site in 1781, and this mill ceased functioning in the 1920s.
Lombard Street Bridge is a historic truss bridge located at Baltimore, Maryland, United States. It is an 88-foot cast iron span consisting of three lines of trusses—two outer trusses of composite cast and wrought iron in a diagonal Pratt design and a center composite bowstring truss of Pratt-system web. It was designed in 1877 by engineer Wendel Bollman (1814–1884). The center bowstring is actually a bifurcated cast iron water main. This design for a bridge carrying a water line as a component of the truss bridge support itself is a unique design element of this bridge.
Union Bridge station is a historic railway station in Union Bridge, Carroll County, Maryland. It was built in 1902 as a stop for the Western Maryland Railway. It is representative of the rural railway stations constructed during the late 19th and early 20th centuries. The station's two buildings are arranged with their south façades lengthwise fronting the railroad tracks.
Wilson's Bridge is a bridge near Hagerstown, Washington County, Maryland, United States. It originally carried the Hagerstown and Conococheague Turnpike, the National Road, across Conococheague Creek 7 miles (11 km) west of Hagerstown. The five-arched structure, the longest of the county's stone bridges, is 210 feet (64 m) in length and is constructed of coursed local limestone. The bridge was erected in 1819 by Silas Harry, who had built similar bridges in Pennsylvania. The bridge was closed in June 1972 when it was damaged by floods which occurred during Tropical Storm Agnes.
