The National Road was the first major improved highway in the United States built by the federal government. Built between 1811 and 1837, the 620-mile (1,000 km) road connected the Potomac and Ohio Rivers and was a main transport path to the West for thousands of settlers. When improved in the 1830s, it became the second U.S. road surfaced with the macadam process pioneered by Scotsman John Loudon McAdam.
A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements may be stressed from tension, compression, or sometimes both in response to dynamic loads. The basic types of truss bridges shown in this article have simple designs which could be easily analyzed by 19th and early 20th-century engineers. A truss bridge is economical to construct because it uses materials efficiently.
There are over 1,400 buildings, sites, districts, and objects in Kansas listed on the National Register of Historic Places in Kansas. NRHP listings appear in 101 of the state's 105 counties.
James Barney Marsh was an American engineer and bridge designer. He patented a new design for arch bridges. Marsh gave Archie Alexander, the first African-American to graduate as an engineer from Iowa State University, his first job. Marsh worked in the bridge building business for over 50 years, and several of his bridges are listed in the National Register of Historic Places.
The Coraopolis Bridge is a girder bridge over the back channel of the Ohio River connecting Grand Avenue on Neville Island to Ferree Street in Coraopolis, Pennsylvania. It opened in 1995 to replace a structure of historic significance. The original Pratt/Bowstring/Pennsylvania through truss spans, designed by Theodore Cooper, were formerly the (third) Sixth Street Bridge, spanning the Allegheny River, in downtown Pittsburgh, and were built in 1892 by the Union Bridge Company. They were floated downstream by the Foundation Company in 1927 rather than being demolished when the bridge was removed to enable construction of the present (fourth) Three Sisters (Pittsburgh) Sixth Street Self-anchored suspension bridge. However, by the late 1980s, the old bridge could no longer support traffic volumes and was replaced by a newer structure.
The following is a list of Registered Historic Places in Iron County, Michigan. The list includes 79 structures and historic districts that are significant for their architectural, historical, or industrial/economic importance.
The Bollman Truss Railroad Bridge at Savage, Maryland is the sole surviving example of a revolutionary design in the history of American bridge engineering. The 160-foot (48.8 m) double-span is a suspension truss bridge. The first Bollman bridge was installed on the site; however, the current bridge is not the original. The current bridge was built in 1852 and moved to the site thirty years later. It is one of the oldest standing iron railroad bridges in the United States. Currently, however, it is in use carrying the Savage Mill Trail across the Little Patuxent River.
The Phoenix Iron Works, located in Phoenixville, Pennsylvania, was a manufacturer of iron and related products during the 19th century and early 20th century. Phoenix Iron Company was a major producer of cannons for the Union Army during the American Civil War. The company also produced the Phoenix column, an advance in construction material. Company facilities are a core component of the Phoenixville Historic District, a National Register of Historic Places site that was in 2006 recognized as a historic landmark by ASM International.
Squire Whipple was an American civil engineer.
The County Line Bowstring is a bridge located near unincorporated Hollis, Kansas, United States, that is listed on the National Register of Historic Places. It spans West Creek on the border between Cloud and Republic counties and has a wooden deck with a bowstring pony truss.
Kern Bridge or Yaeger Bridge crossed the Le Sueur River in Blue Earth County in the U.S. state of Minnesota. It was built in 1873 using a bowstring through truss design by the Wrought Iron Bridge Company. It was 183.5 feet (56 m) long and carried a local road. It was listed on the National Register of Historic Places in 1980 as Minnesota's only bowstring arch truss bridge and oldest road bridge still in use. However, it was closed to vehicle traffic in 1991.
Blackfriars Bridge in London, Ontario, Canada is a wrought iron bowstring arch through truss bridge, crossing the North Thames River. The bridge was constructed in 1875 and carries single-lane vehicles, bicycles and pedestrians from Blackfriars Street to Ridout Street North.
The King Iron Bridge & Manufacturing Company was a late-19th-century bridge building company located in Cleveland, Ohio. It was founded by Zenas King (1818–1892) in 1858 and subsequently managed by his sons, James A. King and Harry W. King and then his grandson, Norman C. King, until the mid-1920s. Many of the bridges built by the company were used during America's expansion west in the late 19th century and early 20th century, and some of these bridges are still standing today.
The Crum Road Bridge is a historic bridge near Walkersville, Frederick County, Maryland, United States. It spans 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 Joseph Kirkwood House is a historic house in the village of Bridgeport, Ohio, United States. Originally home to one of the area's oldest families, it was built in the middle of the nineteenth century in a mix of architectural styles. Named a historic site in the 1980s, it has been converted into a health care facility.
The Lockington Covered Bridge was a historic covered bridge that once spanned the Great Miami River near Lockington, Ohio, United States. Built in 1848, it employed the Long Truss method of construction. Construction elements included vertical wooden siding, wooden structural elements, wooden shingles on its roof, and cut stone abutments. Measuring approximately 170 feet (52 m) long, the bridge was composed of two spans; it cost $1,500 to build.
The Whipple Cast and Wrought Iron Bowstring Truss Bridge, is located near the entrance to Stevens Farm in southwestern Albany, New York, United States. It was built in 1867, but not moved to its present location until 1899. It is one of the oldest surviving iron bridges in the county, one of the few that use both cast and wrought iron and one of only two surviving examples of the Whipple bowstring truss type. In 1971 it was listed on the National Register of Historic Places, the only bridge in the city of Albany so far to be listed individually.
The Broadway Bridge is a historic arch bridge that spans Greenville Creek on the edge of downtown Greenville, a city in the far western part of the U.S. state of Ohio. Constructed in the early twentieth century, it carries one of the city's most important streets and connects the city's northern and southern sections. One of several large concrete bridges designed by a Cleveland engineer, it has been named a historic site.
Hale Bridge is a historic structure located south of Anamosa, Iowa, United States. It spans the Wapsipinicon River for 296 feet (90 m). It is an example of a bowstring through-arch truss bridge. Perhaps thousands of these bridges were built in Iowa in the in the late 1860s through the 1870s. However, by 1992, fewer than twenty survive.
The Martin Road Bridge is a former road bridge which carried Martin Road across the Shiawassee River in Caledonia Township near Corunna. It was one of the oldest metal through truss highway bridges in Michigan, and was listed on the National Register of Historic Places in 1991. As of 2016, the bridge has been removed from its original site, and will be restored and reassembled at the Auburn Valley State Park in Yorklyn, Delaware.
