Waldo–Hancock Bridge
44.560570000556 - 68.801407813889Koordinaten: 44 ° 33 ' 38.1 "N, 68 ° 48' 5.1 " W
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The Waldo -Hancock Bridge was the first major suspension bridge in the U.S. state of Maine and also the first road bridge over the Penobscot River below Bangor. The bridge opened in 1931 was closed in 2006 when the new Penobscot Narrows Bridge was opened right next to her. The U.S. Route 1 connects at this point Waldo County Hancock County.
Description
The planned by David B. Steinman bridge was a total 621.8 m (2040 ft ) long. The inside dimensions of 41.15 m (135 ft) above MHW corresponded to the time specified by the Brooklyn Bridge measure. Your main opening had a wingspan of 243.84 m ( 800 ft), the lateral openings had spans of 106.68 m (350 ft). The track support consisted of a 2.74 m (9 ft) high and 7 m wide truss construction.
The narrow pylons were no longer provided with neo-Gothic elements, as many older and even Steinman simultaneously built St. Johns Bridge in Portland (Oregon ). Instead of even then used diagonal struts its pillars were reinforced with horizontal truss trusses. Similar rectangular openings with ornamental vertical bars used in the Steinman, also built in Maine Deer Isle Bridge and Othmar Ammann in the roughly contemporary Triborough Bridge.
Passed the supporting cables, as well as near the St. Johns Bridge, not out of parallel wire cables, but from commercially manufactured, twisted ropes, bundled, pressed together and were jacketed. This method, first used by Steinman at the Pont de Grand-Mere made a much quicker installation of the cables and thus a significant reduction of costs possible.
The Waldo -Hancock Bridge was taken by the American Society of Civil Engineers in the List of Historic Civil Engineering Landmarks in 2002.
During renovation work in 2003 showed that, among other actions, new ropes would be required, which would make a longer preserve the bridge uneconomical. Therefore, the construction of the Penobscot Narrows Bridge has been decided. The demolition of the old bridge was completed in June 2013.