Английская Википедия:Inclined Plane Bridge
Шаблон:Infobox bridge The Inclined Plane Bridge is a Шаблон:Convert, Pennsylvania through truss bridge that spans Stonycreek River in Johnstown, Cambria County, in the U.S. state of Pennsylvania. It connects the city to the lower station of the Johnstown Inclined Plane. The bridge was listed on the National Register of Historic Places in 1988 and was documented by the Historic American Engineering Record (HAER) in 1997.
History
On May 31, 1889, the South Fork Dam on the Little Conemaugh River, upstream of Johnstown, collapsed.Шаблон:Sfn The resulting deluge devastated the city, killing over 2,000 people. As the city rebuilt, the Cambria Iron Company started work on a residential development atop Yoder Hill, overlooking the city.Шаблон:Sfn To provide easy transportation across the steep slope for the residents of the new community of Westmont, as well as to function as an escape route for future floods, the company opted to construct the Johnstown Inclined Plane, a funicular. A bridge had to be built to connect Johnstown to the lower station of the incline, on the opposite side of Stonycreek River as the city.Шаблон:Sfn
Work started on the bridge on June 11, 1890, with excavation of the bridge's abutments finished a week later.Шаблон:Sfn By March 20, 1891, only the approach to the bridge remained to be completed. The bridge, officially, was opened on June 1, 1891, at the same time as the incline. On March 17, 1936, nearly 4,000 people crowded on the approach, the bridge, and numerous boats to escape to higher ground via the incline as Stoneycreek and Conemaugh Rivers overflowed their banks.Шаблон:Sfn The floodwaters continued downstream and eventually reached Pittsburgh.
The Works Progress Administration appropriated $17,812 in October 1936 to repair the bridge's approach and replace stringers, handrails and the road deck.Шаблон:Sfn The Pennsylvania Department of Highways, the predecessor to the Pennsylvania Department of Transportation (PennDOT), acquired the bridge in 1964.Шаблон:Sfn It was listed on the National Register of Historic Places on June 22, 1988.[1] On September 1, 2000, PennDOT undertook a $2.3 million renovation of the bridge and the access road leading to it.Шаблон:Sfn Work was suspended from April to September 2001, to allow operation of the incline. The renovations were completed on December 14, 2001, after PennDOT finished repairs to the bridge deck.Шаблон:Sfn
Design
The Inclined Plane Bridge was made from wrought iron and steel riveted together to form a Pennsylvania truss.Шаблон:SfnШаблон:Sfn The Pennsylvania, or Petit, truss is "essentially a Pratt truss" with the outermost horizontal girders being "polygonal" and having "subdivided panels" to "stiffen the truss under heavy loads."Шаблон:Sfn At Шаблон:Convert long, the Inclined Plane Bridge is relatively short for a Pennsylvania truss; bridges of this sort are generally Шаблон:Convert long.[2]Шаблон:Sfn
See also
- List of bridges on the National Register of Historic Places in Pennsylvania
- List of bridges documented by the Historic American Engineering Record in Pennsylvania
- National Register of Historic Places listings in Cambria County, Pennsylvania
References
Sources
External links
Шаблон:National Register of Historic Places in Pennsylvania Шаблон:NRHP bridges
- Английская Википедия
- Bridges completed in 1891
- Road bridges on the National Register of Historic Places in Pennsylvania
- Buildings and structures in Johnstown, Pennsylvania
- Bridges in Cambria County, Pennsylvania
- Pennsylvania truss bridges in the United States
- Wrought iron bridges in the United States
- Historic American Engineering Record in Pennsylvania
- 1891 establishments in Pennsylvania
- National Register of Historic Places in Cambria County, Pennsylvania
- Steel bridges in the United States
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
- Страницы с ошибками в примечаниях
