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Cogan House Covered Bridge
The Cogan House Covered Bridge is a Burr arch truss covered bridge over Larrys Creek in Cogan House Township, Lycoming County, in the U.S. state of Pennsylvania. It was built in 1877 and is long. The bridge was placed on the National Register of Historic Places in 1980, and had a major restoration in 1998. The Cogan House bridge is named for the township and village of Cogan House, and is also known by at least four other names: Buckhorn, Larrys Creek, Day's, and Plankenhorn. The Cogan House Covered Bridge was constructed by a millwright who assembled the timber framework in a field next to the sawmill, before it was reassembled at the bridge site. It was the only bridge on Larrys Creek that survived the flood of June 1889, and one of only a handful that were left intact in the county. Although the bridge used to carry a steady flow of tannery and sawmill traffic, the clearcutting of the surrounding forests meant the end of those industries by the early 20th century. Since then ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cogan House Township, Lycoming County, Pennsylvania
Cogan House Township is a township in Lycoming County, Pennsylvania, United States. The population was 930 at the 2020 census. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area. History Cogan House Township was formed from parts of Jackson and Mifflin townships on December 6, 1843. The source of Larrys Creek is in Cogan House Township, just south of the hamlet of Steam Valley. It flows west-southwest through the village of Cogan House, and then under the Cogan House Covered Bridge. The bridge is also known as the "Buckhorn Covered Bridge" (for a nearby mountain and vanished village) or the "Larrys Creek Covered Bridge" (for the creek it crosses). A petition from the citizens of Cogan House Township for a bridge to be built was filed on September 4, 1876. The Burr arch truss bridge was built in 1877 and rehabilitated in 1998, and is on the National Register of Historic Places. Larrys Creek was vitally important to the economic development of Cogan House ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millwright
A millwright is a craftsperson or skilled tradesperson who installs, dismantles, maintains, repairs, reassembles, and moves machinery in factories, power plants, and construction sites. The term ''millwright'' (also known as ''industrial mechanic'') is mainly used in the United States, Canada and South Africa to describe members belonging to a particular trade. Other countries use different terms to describe tradesmen engaging in similar activities. Related but distinct crafts include machinists, mechanics and mechanical fitters . As the name suggests, the original function of a millwright was the construction of flour mills, sawmills, paper mills and fulling mills powered by water or wind, made mostly of wood with a limited number of metal parts. Since the use of these structures originates in antiquity, millwrighting could arguably be considered one of the oldest engineering trades and the forerunner of modern mechanical engineering. In modern usage, a millwright is engaged ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arch
An arch is a vertical curved structure that spans an elevated space and may or may not support the weight above it, or in case of a horizontal arch like an arch dam, the hydrostatic pressure against it. Arches may be synonymous with vaults, but a vault may be distinguished as a continuous arch forming a roof. Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were the first to apply the technique to a wide range of structures. Basic concepts An arch is a pure compression form. It can span a large area by resolving forces into compressive stresses, and thereby eliminating tensile stresses. This is sometimes denominated "arch action". As the forces in the arch are transferred to its base, the arch pushes outward at its base, denominated "thrust". As the rise, i. e. height, of the arch decreases the outward thrust increases. In order to preserve arch action and prevent collapse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Structural Engineering
Structural engineering is a sub-discipline of civil engineering in which structural engineers are trained to design the 'bones and muscles' that create the form and shape of man-made structures. Structural engineers also must understand and calculate the stability, strength, rigidity and earthquake-susceptibility of built structures for buildings and nonbuilding structures. The structural designs are integrated with those of other designers such as architects and building services engineer and often supervise the construction of projects by contractors on site. They can also be involved in the design of machinery, medical equipment, and vehicles where structural integrity affects functioning and safety. See glossary of structural engineering. Structural engineering theory is based upon applied physical laws and empirical knowledge of the structural performance of different materials and geometries. Structural engineering design uses a number of relatively simple structural c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philadelphia
Philadelphia, often called Philly, is the largest city in the Commonwealth of Pennsylvania, the sixth-largest city in the U.S., the second-largest city in both the Northeast megalopolis and Mid-Atlantic regions after New York City. Since 1854, the city has been coextensive with Philadelphia County, the most populous county in Pennsylvania and the urban core of the Delaware Valley, the nation's seventh-largest and one of world's largest metropolitan regions, with 6.245 million residents . The city's population at the 2020 census was 1,603,797, and over 56 million people live within of Philadelphia. Philadelphia was founded in 1682 by William Penn, an English Quaker. The city served as capital of the Pennsylvania Colony during the British colonial era and went on to play a historic and vital role as the central meeting place for the nation's founding fathers whose plans and actions in Philadelphia ultimately inspired the American Revolution and the nation's inde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schuylkill River
The Schuylkill River ( , ) is a river running northwest to southeast in eastern Pennsylvania. The river was improved by navigations into the Schuylkill Canal, and several of its tributaries drain major parts of Pennsylvania's Coal Region. It flows for U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map , accessed April 1, 2011 from Pottsville to Philadelphia, where it joins the Delaware River as one of its largest tributaries. In 1682, William Penn chose the left bank of the confluence upon which he founded the planned city of Philadelphia on lands purchased from the native Delaware nation. It is a designated Pennsylvania Scenic River, and its whole length was once part of the Delaware people's southern territories. The river's watershed of about lies entirely within the state of Pennsylvania, the upper portions in the Ridge-and-valley Appalachian Mountains where the folding of the mountain ridges metamorphically modified bit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
County Commission
A county commission (or a board of county commissioners) is a group of elected officials (county commissioners) collectively charged with administering the county government in some states of the United States; such commissions usually comprise three to five members. In some counties within Georgia, however, a sole commissioner holds the authority of the commission. In parts of the United States, alternative terms such as County Board of Supervisors or County Council may be used in lieu of, but generally synonymous to, a County Commission. However, in some jurisdictions there may be distinct differences between a County Commission and other similarly titled bodies. For example, a County Council may differ from a County Commission by containing more members or by having a Council-Manager form of government. In Indiana, every county, except Marion, which is consolidated with Indianapolis, has both a County Commission and a County Council, with the County Commission having admi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mifflin Township, Lycoming County, Pennsylvania
Mifflin Township is a township in Lycoming County, Pennsylvania, United States. The population was 1,088 at the 2020 census. It is part of the Williamsport Metropolitan Statistical Area. History Mifflin Township was formed in 1803 by dividing Lycoming Township. It is named in honor of Thomas Mifflin, the first governor of Pennsylvania. Early settlers When colonial settlers first arrived in what is now Mifflin Township, they were outside the western boundary of what was then the Province of Pennsylvania. These settlers were not under the jurisdiction or protection of any type from any of the Thirteen Colonies. They became known as the Fair Play Men. These men established their own form of government, known as the "Fair Play System", with three elected commissioners who ruled on land claims and other issues for the group. In a remarkable coincidence, the Fair Play Men made their own Declaration of Independence from Britain on July 4, 1776, beneath the "Tiadaghton Elm" on th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jackson Township, Lycoming County, Pennsylvania
Jackson Township is a township in Lycoming County, Pennsylvania, United States. The population was 394 at the 2020 census. It is part of the Williamsport Metropolitan Statistical Area. The unincorporated village of Buttonwood is in the township. In Buttonwood there is a covered bridge over Blockhouse Creek, a tributary of Little Pine Creek. History Jackson Township was once part of Lycoming Township. At the time Lycoming Township stretched from the West Branch Susquehanna River to the northern border of Lycoming County. The residents of the northern part of the township became dissatisfied with their representation in township matters. Most of the officers of the townships were from the southernmost portions near the river and they tended to forget about their neighbors to the north. The concerned citizens of the northern portions of Lycoming Township petitioned that a township for their interests be formed from Lycoming Township, and the Court of Quarter Sessions of the Peac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Route 184
Pennsylvania Route 184 (PA 184, designated by the Pennsylvania Department of Transportation as SR 184) is an state highway located in Lycoming County in Pennsylvania. The western terminus is at PA 287 in Brookside. The eastern terminus is at Steam Mill Road, just after an interchange with U.S. Route 15 (US 15) in Steam Valley, a hamlet of Cogan House Township. The route was first designated as a spur from PA 84 in Brookside to US 15 via Cogan House Road. (PA 84 was renumbered to PA 287 in 1961.) Construction to upgrade US 15 several miles each way from its intersection with PA 184 to interstate standards included a new interchange with PA 184. Route description PA 184 begins at an intersection with PA 287 in the hamlet of Brookside. The route progresses to the northeast, heading through the rural areas of Cogan House Township. PA 184 continuously winds through the woods before forming a short ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secondary Forest
A secondary forest (or second-growth forest) is a forest or woodland area which has re-grown after a timber harvest or clearing for agriculture, until a long enough period has passed so that the effects of the disturbance are no longer evident. It is distinguished from an old-growth forest (primary or primeval forest), which has not recently undergone such disruption, and complex early seral forest, as well as third-growth forests that result from harvest in second growth forests. Secondary forest regrowing after timber harvest differs from forest regrowing after natural disturbances such as fire, insect infestation, or windthrow because the dead trees remain to provide nutrients, structure, and water retention after natural disturbances. However, often after natural disturbance the timber is harvested and removed from the system, in which case the system more closely resembles secondary forest rather than seral forest. Description Depending on the forest, the development of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
