Bear Mountain Bridge
41.319966666667 - 73.9837Koordinaten: 41 ° 19 ' 11.9 "N, 73 ° 59' 1.3 " W
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The Bear Mountain Bridge is a two-lane road bridge in the U.S. state of New York, spanning the Hudson River between Rockland County and Orange County in the west and Westchester County and Putnam County to the east.
In its opening on 27 November 1924, it was the first bridge over the Hudson River south of Albany, New York and the longest suspension bridge in the world until it was replaced in 1926 by the Benjamin Franklin Bridge. The Bear Mountain Bridge was also the first suspension bridge with a concrete deck.
Location
The Bear Mountain Bridge is located in a narrow part of the Hudson River between the steep slopes of Bear Mountain and Anthony 's Nose. On the river banks under their railway lines operated by the Metropolitan Transportation Authority Hudson Line and the River Subdivision located on the western side. The Bear Mountain Bridge is located in the wake of U.S. Highway 6 and U.S. 202, the hiking trail Appalachian Trail and the New York State Bicycle Route 9 and some 10 kilometers further upstream is the United States Military Academy at West Point.
History
As early as 1868, there were proposals for a double-decker suspension bridge with railway tracks and lanes. It was hoped by rail coal from Pennsylvania cheaper to transport to New England. After lengthy survey work in the difficult, mountainous terrain and various unsuccessful attempts to build the bridge, the activities were discontinued.
In 1913 the west of the Hudson River lying opened Bear Mountain State Park, which quickly became a popular destination for New York's population, so that the now installed ferry was often overloaded. In 1922, the Bear Mountain Hudson River Bridge Company a statutory license for the construction and operation of a 30 -year-old road bridge over the Hudson. The plans for the bridge were created by Howard C. Baird and Francis P. Witmer. In March 1923, we began work on the bridge and at the almost 5 km long access road along the steep slopes of the Hudson. In October, the anchorages for the suspension cable in the granite slopes were done in April 1924 were the steel pylons. In August had completed the air spinning process for producing the suspension cable John A. Roebling & Sons Co.. Then the antransportierten with ships elements of the roadway support were hung on the suspension cable and finally introduced the concrete for the pavement. On September 10, 1924, the bridge was completed. It was officially opened on 26 November 1926, released the following day for traffic.
Although the bridge was technically a success, but financially they brought in 13 of the first 16 years, only losses. In 1940 she was acquired by the New York State Bridge Authority, which significantly lowered the toll in two stages.
In 1982, the Bear Mountain Bridge was entered in the National Register of Historic Places.
Description
The Bear Mountain Bridge is a suspension bridge with a span of the main span of 497.43 m (1632 ft) and a clear height of 41 m (135 ft) above MHW. She has beside the two lanes in each a bike path or hard shoulder and behind concrete ramps ever a narrow footpath.
The road carrier is formed from a 15.24 m (50 ft) wide steel truss structure. Its two 107 m (351 ft) high pylons consist of two slim, steel stems that are stiffened by horizontal and diagonal braces to each other, but in the longitudinal direction are flexible. This stems support the two 46 cm thick suspension cable of parallel wire cables that are anchored directly into the granite rocks of the shore slopes. The hanger of the supporting cable is connected to the lower flange of the track support, which is why the support cables are led to the outside on the bottom chord along a track, up. In the middle third of the bridge they therefore extend below the resting on the support track what the users of the bridge allows an uninterrupted view over the Hudson River.
Only the track support the main opening is secured with hangers on the supporting cables, the side panels are short truss bridges with no connection to the supporting cables. The road was first made of a cast-in- place concrete ceiling, but has no load-bearing function.
The Bear Mountain Bridge is with her slender pylons and the comparatively light and narrow track support is an example of the influence that the further developed since the Manhattan Bridge Deflektionstheorie had on the construction of suspension bridges.
Since the year 2012 is the data collected by the bridge operator New York State Bridge Authority bridge toll, which is, however, applicable only in an easterly direction, for cars $ 1.50 or $ 1.25 with an electronic E- ZPass.