The Buttonwood Covered Bridge is a
covered bridge
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 woo ...
built in either 1878 or 1898 over
Blockhouse Creek in
Jackson Township,
Lycoming County
Lycoming County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 114,188. Its county seat is Williamsport.
Lycoming County comprises the Williamsport metropolitan statistical area.
About northwe ...
in the
U.S. state
In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sove ...
of
Pennsylvania
Pennsylvania (; (Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, Ma ...
. It uses a
queen post
A queen post is a tension member in a truss that can span longer openings than a king post truss. A king post uses one central supporting post, whereas the queen post truss uses two. Even though it is a tension member, rather than a compression m ...
with
king post
A king post (or king-post or kingpost) is a central vertical post used in architectural or bridge designs, working in tension to support a beam below from a truss apex above (whereas a crown post, though visually similar, supports items above f ...
truss and is long. The bridge was placed on the
National Register of Historic Places
The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artist ...
in 1980, and had a major restoration in 1998. It is the shortest and most heavily used of the three covered bridges remaining in Lycoming County.
Dimensions
The following table is a comparison of published measurements of length, width and load recorded in different sources using different methods, as well as the structural type cited. The NBI measures bridge length between the "backwalls of abutments" or pavement grooves and the roadway width as "the most restrictive minimum distance between curbs or rails".
The NRHP form measures length from "end post to end post", and was prepared by the
Pennsylvania Historical and Museum Commission
The Pennsylvania Historical and Museum Commission (PHMC) is the governmental agency of the Commonwealth of Pennsylvania responsible for the collection, conservation and interpretation of Pennsylvania's historic heritage. The commission cares for ...
(PHMC), which surveyed county engineers, historical and covered bridge societies, and others for all the covered bridges in the commonwealth.
The Evans visited every covered bridge in Pennsylvania in 2001 and measured each bridge's length (portal to portal) and width (at the portal) for their book.
The data in Zacher's book was based on a 1991 survey of all covered bridges in Pennsylvania by the PHMC and the Pennsylvania Department of Transportation, aided by local government and private agencies.
The article uses primarily the NBI and NRHP data, as they are national programs.
See also
*
References
External links
*
{{NRHP bridges
Covered bridges in Lycoming County, Pennsylvania
Bridges completed in 1898
Covered bridges on the National Register of Historic Places in Pennsylvania
Wooden bridges in Pennsylvania
Bridges in Lycoming County, Pennsylvania
Tourist attractions in Lycoming County, Pennsylvania
1898 establishments in Pennsylvania
National Register of Historic Places in Lycoming County, Pennsylvania
Road bridges on the National Register of Historic Places in Pennsylvania
Queen post truss bridges in the United States