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Blackledge River Railroad Bridge
The Blackledge River Railroad Bridge is a Warren truss bridge that was built on the site of a c. 1870 railroad bridge. The original bridge was completed and opened by August 3, 1877. Likely built by the Colchester Railway Company, the bridge was part of the of track from Colchester, Connecticut, to Turnerville (now known as Amston, Connecticut). The line was leased to the Boston & New York Air Line Railroad and reported improvement in 1879 and a new iron bridge by 1881. The line was leased to the New York, New Haven and Hartford Railroad in 1882. After dominating the region, the New York, New Haven and Hartford Railroad petitioned for changes to the Air Line and the approval came on July 7, 1911.
The historic Blackledge River Railroad Bridge was constructed c. 1912 as an improved version of the previous bridge. The new bridge integrated the previous abutments into the design and was elevated a further above the Blackledge River. The railroad bridge was abandoned in the 1960s and sold to the Connecticut Department of Transportation. The bridge was added to the National Register of Historic Places on July 31, 1986. The bridge is now located in Airline State Park. By 2007, a wooden pedestrian bridge was built atop the railroad bridge and crosses over the Blackledge River.
== Previous bridges ==
According to the National Register of Historic Places nomination, the first bridge was constructed in the early 1870s by the New York and Boston Air Line Railroad. The details on this bridge are largely unknown, but contradictory evidence exists placing the construction of the bridge between 1876 and 1877. According to Marshall, the Air Line Railroad was completed in 1873 and the Colchester branch was completed in 1877.
Organized in 1876, the Colchester line was completed by the Colchester Railway Company. The line operated 3.59 miles of track from Colchester, Connecticut, to Turnerville (now known as Amston, Connecticut) and it opened on August 3, 1877.〔〔(【引用サイトリンク】 title=A Brief History Lines West Of The New York, New Haven and Hartford Railroad Co. )〕 The line was leased on April 3, 1878 to the Boston & New York Air Line Railroad company for 999 years.〔 In January 1879, the Air Line reported that the Black Ledge bridge had 25,000 yards of earth moved to replace a high piling and 2,500 cubic yards of masonry added in preparation for the installation of a new bridge. In 1881, the Air Line announced the replacement of the Howe truss and the installation of a new iron bridge. On October 1, 1882, the line was leased to the New York, New Haven and Hartford Railroad for 99 years. The Air Line reported to the Railroad Commissioners in 1899 that a bridge over Blackledge River was completed. The New York, New Haven and Hartford dominated the region by 1905, having acquiring over three dozen railroads.〔 In 1907, the company sought to improve and modernize the Air Line.〔 On April 17, 1911, the company petitioned the Railroad Commissioners for alterations and changes. The approval for the changes came on July 7, 1911.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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