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Big Blue River Bridge (Grafton, Nebraska) : ウィキペディア英語版 | Big Blue River Bridge (Grafton, Nebraska)
The Big Blue River Bridge is a National Register of Historic Places-listed bridge located in Fillmore County, Nebraska, near the village of Grafton. The bridge is one of two listed on the Register within Fillmore County, the other being the Deering Bridge. The bridge is a single-span, concrete, spandrel arch facility. The site was first designed by state engineers in 1917, and was constructed in 1918. At the time of the construction, the facility's architectural style was the main bridge design in the state. The bridge still retains all original building materials, and has only undergone slight maintenance since construction. The bridge carries Fillmore County Road 6 over the West Fork of the Big Blue River. ==Location and description== The Big Blue River Bridge is located in the Grafton Township, in the northwestern portion of Fillmore County. The bridge is located approximately five miles north and one mile west of the village of Grafton,〔Hess 1992, p. 1〕 or approximately directly northwest of Grafton. The facility is located along Fillmore County Road 6 (CR 6), and is about from CR 6's northern terminus at County Road 1, and about north of CR 6's southern terminus at Thayer County Road AA. The site is rectangular shaped, with dimensions of by , which contains only the bridge.〔Hess 1992, p. 4〕 The Big Blue River Bridge carries CR 6 over the West Fork of the Big Blue River. The bridge is located just west of School Creek's confluence with the river. The facility carries the road's single lane. The bridge consists of a single-span, concrete filled spandrel arch, with a substructure consisting of two abutments and several flared wingwalls. The span has a length of while the bridge has a total length of . The roadway width along the bridge is .〔Hess 1992, p. 2〕 The facility's floor is covered with gravel filled with dirt, the same substance as the surface of the road. The bridge structure also contains a solid, concrete, rectangular parapet.〔〔Hess 1992, p. 5〕
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