A covered bridge is a timber-truss bridge with a roof, decking, and siding, which in most covered bridges create an almost complete enclosure. The purpose of the covering is to protect the wooden structural members from the weather. Uncovered wooden bridges typically have a lifespan of only 20 years because of the effects of rain and sun, but a covered bridge could last over 100 years. In the United States, only about 1 in 10 survived the 20th century. The relatively small number of surviving bridges is due to deliberate replacement, neglect, and the high cost of restoration.
The Bucher's Mill Covered Bridge or Butcher's Mill Covered Bridge is a covered bridge that spans Cocalico Creek in Lancaster County, Pennsylvania, United States. After the Landis Mill Covered Bridge, it is the second shortest covered bridge in the county. A county-owned and maintained bridge, its official designation is the Cocalico #2 Bridge.
The Landis Mill Covered Bridge is a covered bridge that spans the Little Conestoga Creek in Lancaster County, Pennsylvania, United States. A county-owned and maintained bridge, its official designation is the Little Conestoga #1 Bridge. The bridge, built in 1873 by Elias McMellen, is today surrounded by a development, shopping center, and highways on the boundary of Lancaster, Pennsylvania. At 53 feet (16 m), it is the shortest covered bridge in the county.
The Mercer's Mill Covered Bridge or Mercer's Ford Covered Bridge is a covered bridge that spans the East branch of the Octoraro Creek on the border between Lancaster County and Chester County in Pennsylvania, United States. A Lancaster County-owned and maintained bridge, its official designation is the East Octoraro #2 Bridge.
The Pine Grove Covered Bridge is a covered bridge that spans the East Branch of Octoraro Creek on the border between Lancaster County and Chester County in Pennsylvania, United States. It is the longest covered bridge in Lancaster County. The bridge was built in 1884 by Elias McMellen.
The Pinetown Bushong's Mill Covered Bridge is a covered bridge that spans the Conestoga River in Lancaster County, Pennsylvania, United States. A county-owned and maintained bridge, its official designation is the Big Conestoga #6 Bridge. The bridge is also known as Pinetown Covered Bridge, Nolte's Point Mill Bridge and Bushong's Mill Bridge.
The Zook's Mill Covered Bridge is a covered bridge that spans Cocalico Creek in Lancaster County, Pennsylvania, United States. A county-owned and maintained bridge, its official designation is the Cocalico #7 Bridge. The bridge is also known as Wenger Covered Bridge or Rose Hill Covered Bridge. It is located west of Brownstown on T 797, near the Warwick and West Earl Townships.
The White Rock Forge Covered Bridge or White Rock Covered Bridge is a covered bridge that spans the West Branch of the Octoraro Creek in southeast Lancaster County, Pennsylvania. A county-owned and maintained bridge, its official designation is the West Octoraro #2 Bridge. It was first built in 1847 by John Russell and Elias McMellen, but the original was destroyed and last rebuilt in 1884. The wooden burr bridge crosses the West Branch of the Octoraro Creek. It is 103 feet long and 13 feet wide.
The Pool Forge Covered Bridge is a covered bridge that spans the Conestoga River in Lancaster County, Pennsylvania, United States. The bridge is now on private property where it was once used as a storage barn before the owner added a road to receive vehicle traffic.
Florenceville-Bristol is a former town in the northwestern part of Carleton County, New Brunswick, Canada along the Saint John River. It held town status prior to 2023 and is now part of the town of Carleton North.
A cantilever bridge is a bridge built using structures that project horizontally into space, supported on only one end. For small footbridges, the cantilevers may be simple beams; however, large cantilever bridges designed to handle road or rail traffic use trusses built from structural steel, or box girders built from prestressed concrete.
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, typically straight, may be stressed from tension, compression, or sometimes both in response to dynamic loads. There are several types of truss bridges, including some with simple designs that were among the first bridges designed in the 19th and early 20th centuries. A truss bridge is economical to construct primarily because it uses materials efficiently.
The Hartland Covered Bridge in Hartland, New Brunswick, is the world's longest covered bridge, at 1,282 feet (391 m) long. It crosses the Saint John River from Hartland to Somerville, New Brunswick, Canada. The framework consists of seven small Howe Truss bridges joined on six piers.
The Port Deposit Bridge was the earliest bridge crossing of the Susquehanna River below Columbia, Pennsylvania, providing the first reliable link between the northern and southern United States. The bridge was also the fifth and last of Theodore Burr's Susquehanna crossings. The wooden covered bridge was constructed just north of Port Deposit, Maryland, between 1817 and 1818 and lasted until 1857. It was built and operated by the Susquehanna Bridge and Bank Company.
A Howe truss is a truss bridge consisting of chords, verticals, and diagonals whose vertical members are in tension and whose diagonal members are in compression. The Howe truss was invented by William Howe in 1840, and was widely used as a bridge in the mid to late 1800s.
Buskirk Bridge is a wooden covered bridge and is the name of the hamlet in which it is located. It is in the town of Hoosick. The bridge, which crosses the Hoosic River is one of 29 historic covered bridges in New York State. The bridge takes its name from the nearby hamlet of the same name, which was named after the local Van Buskirk family.
The Housatonic River Railroad Bridge is a historic bridge carrying Metro-North Railroad's New Haven Line trackage across the lower Housatonic River in the U.S. state of Connecticut. The bridge is also used by Amtrak for its Northeast Corridor services. It was listed on the National Register of Historic Places in 1987, which also refers to the bridge as the Devon Bridge. It is also referred to as the Devon Railroad Bridge by the state Department of Environmental Protection.
The Banks Covered Bridge is a wooden covered bridge in Wilmington Township, Lawrence County, Pennsylvania, United States. It spans the Neshannock Creek southeast of New Wilmington. Constructed in 1889, the bridge is a Burr arch truss built on stone foundations and supported by steel girders; it is 121 feet (37 m) long.
The Wells River Bridge between Wells River, Vermont and Woodsville, New Hampshire, is a steel double-decked Baltimore truss bridge over the Connecticut River. It was built in 1903 to carry rail and road traffic.
