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The Lyman Viaduct was a railroad trestle built over Dickinson Creek in Colchester, Connecticut in 1873. It was a wrought iron post deck truss design and carried a single track. The viaduct was built by Phoenix Iron Works for the Air Line Railroad, and was long and high. The creek valley was filled in and the trestle was covered in 1913.〔U.S National Park Service (1986). ("Lyman Viaduct." ) ''National Register of Historic Places Inventory—Nomination Form.'' Entered 1986-08-21. Reference No. 86002729.〕 Passenger train traffic peaked on the Air Line route in the 1880s and 1890s, but the winding course and speed limitations of the Air Line could not compete with the Shore Line Railway, a faster route following the shore of Long Island Sound. At the beginning of the 20th century the viaduct was still used for local passenger trains and freight trains, but the increasing weight requirements for freight trains led to a large construction project at the site beginning in 1912. To stabilize and strengthen the creek crossing, the valley was filled with sand and the trestle was covered with cinders. The rail line suffered major disruptions from flooding in 1955, and the Air Line was abandoned in the 1960s.〔Connecticut Department of Energy & Environmental Protection. ("Air Line State Park Trail: Overview." ) Accessed 2012-11-25.〕 The Air Line route later was converted to the Air Line State Park Trail.〔 The site was added to the National Register of Historic Places in 1986.〔 ==See also== *National Register of Historic Places listings in New London County, Connecticut *List of bridges on the National Register of Historic Places in Connecticut 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lyman Viaduct」の詳細全文を読む スポンサード リンク
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