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Power House Covered Bridge
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The Power House Covered Bridge, also known as the School Street Covered Bridge, is a covered bridge from 1872 that crosses the Gihon River off State Route 100C in Johnson, Vermont, USA. It was listed on the National Register of Historic Places in 1974.〔 The bridge's name is from a now obsolete hydroelectric generating station just upstream from it.
The bridge is of Queen post truss design by an unknown builder.
==Recent history==
In 1960, minor repairs were conducted to the abutments, approaches and floor. In 1995, it was recommended to reinforce the deck due to the large number of trucks using the road as a short cut. Steel I beams were installed underneath. In 2000, the bridge was destroyed by a heavy snow load. The roof collapsed and the side walls fell outward into the river below. Because of the installation of the steel I beams, the deck was self-supporting and actually survived. Guardrails were put up on the sides of the deck to keep the bridge open while its fate was decided. In 2002, the contracting company of Blow & Cote was hired to reconstruct the bridge, which was reopened on June 29, 2002.〔Barna, Ed. ''Covered Bridges of Vermont''. The Countryman Press, 1996. ISBN 0-88150-373-8〕〔(Vermont Covered Bridge Society News website ). 〕
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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