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Ashland Mill Bridge
The Ashland Mill Bridge was a lenticular pony truss bridge over the Pachaug River in Griswold, Connecticut that was built in 1886 by the Berlin Iron Bridge Company. It was built following the Ashland dam break of February 1886 which washed away the previous bridges. The bridge served the millyard of the Ashland Cotton Company, in the Jewett City section of Griswold. The bridge was long and crossed a millrace on a skew angle. The Ashland Mill was damaged by arson in March 1994 and subsequently torn down, but the bridge itself remained. By 1999, the town deemed the bridge unsafe and closed it, and by February 1999, the bridge was moved to a vacant parking lot and was replaced with a new bridge. The bridge was added to the state of Connecticut historic register and it was later added to the National Register of Historic Places in April 1999.
== Construction ==
Heavy rains in February 1886 caused the Ashland dam to break and the resulting flood damaged the Ashland Cotton Company's buildings and washed away the previous bridges at the site.〔 and (''Accompanying 6 photos from 1998'' )〕 The Berlin Iron Bridge Company was contracted to build a total of three bridges in the area, the Ashland Mill Bridge, another larger lenticular truss for Ashland Street and another bridge for the Slater mill which was located further downstream.〔 Clouette and Tinh note that the mill owners may have been influenced in their decision by the Berlin Iron Bridge Company's bridges that were already in place in the surrounding area.〔
The Ashland Mill Bridge was a single-span lenticular pony truss bridge.〔 Completed in 1886, it was a roadway from Ashland Street to the millyard.〔 The bridge was made of four long panels, totaling in length. The roadway was wide.〔 The bridge's wrought-iron truss was deep and it crossed the river at a 28° angle.〔 All but the truss's joints were pinned except for the endposts' lower-chord nut connections; as was distinctive of the Berlin Iron Bridge Company's bridges.〔 The plate-girder floor beams supported wooden stringers and floored with planks across the width of the bridge.〔 The bridge's railing were made of two 5/8-inch (1.5875 cm) rods bolted to the inside of the trusses.〔 A 1905 postcard depicts the bridge being painted red, but the paint was nearly absent by 1998.〔
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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