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55:. From the surface of the water, at an average stage, up to the track was 200 feet (61 m). The total length was about 900 feet (270 m), and at the time of construction there were no approaches, the opposite banks being abrupt. The pier foundations were built of reinforced concrete, requiring more than 500 cubic yards. The piers and superstructure were of structural steel, of which about 500 tons were used. All the steel material was furnished by the
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this cable all of the structural steel material required, as well as the concrete, were hoisted and conveyed by a trolley to the required point and lowered to the proper position. It took about six months to complete construction. Only a small force of men were employed and the work necessarily progressed rather slowly.
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The engineering involved much difficulty—principally due to the unusual height of the structure. At the beginning of the work the contractors stretched a 2.25 inch diameter steel cable from bank to bank more than 200 feet (61 m) above the Bear River, and 1,000 feet (300 m) long. By means of
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The bridge was on a 1 mile (1.6 km) long cut-off which shortens the road 2 miles (3.2 km), and also eliminated two long wooden bridges, each 100 feet (30 m) high, and one 400 feet (120 m) tunnel.
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63:, and the constructing contractors were Shattuck & Edinger Construction Company, also of San Francisco. The total cost of the bridge was approximately US$ 70,000.
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Mixed passenger and freight train on the old Bear River bridge, 1895
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Engine No. 2 crossing the new steel bridge in
December 1908
102:Bridge over Bear River during construction, 1908
74:The bridge was taken down to make way for the
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144:"Constructing a Very High Railway Bridge"
240:Cantilever bridges in the United States
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121:Bommersbach, Jana (February 1, 2007).
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230:Bridges in Nevada County, California
49:Nevada County Narrow Gauge Railroad
245:Steel bridges in the United States
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235:Railroad bridges in California
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47:The bridge was built by the
165:Wyckoff, Bob (2017-05-24).
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51:, under the management of
250:Bridges completed in 1908
167:"NCNGRR: Down she goes!"
148:The Bridgemen's Magazine
123:"Railroad's First Lady"
57:American Bridge Company
154:: 192–193. April 1909.
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44:bridge in the state.
40:, it was the highest
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206:39.1355°N 120.9526°W
125:. True West Magazine
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211:39.1355; -120.9526
173:. Grass Valley, CA
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197:120°57′09″W
76:Rollins Dam
224:Categories
194:39°08′08″N
177:2019-04-04
129:2009-05-18
108:References
38:Bear River
34:California
171:The Union
78:in 1963.
42:railway
24:The
59:of
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
