The Big Blue River Bridge is a National Register of Historic Places-listed bridge located in Fillmore County, Nebraska, near the village of

Grafton Grafton may refer to: Places Australia * Grafton, New South Wales Canada * Grafton, New Brunswick * Grafton, Nova Scotia * Grafton, Ontario England * Grafton, Cheshire * Grafton, Herefordshire *Grafton, North Yorkshire * Grafton, Oxfordshi ...

. The bridge is one of two listed on the Register within Fillmore County, the other being the

Deering Bridge The Deering Bridge, near Sutton, Nebraska, is a historic bridge that was built in 1916. It is a concrete spandrel arch bridge designed by the Nebraska Bureau of Roads & Bridges and built by the Lincoln Construction Co. Also known as School C ...

. 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 An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side. A viaduct ( ...

, with a substructure consisting of two abutments and several flared

wingwalls A wing wall (also "wingwall" or "wing-wall") is a smaller wall attached or next to a larger wall or structure. Bridges In a bridge, the wing walls are adjacent to the abutments and act as retaining walls. They are generally constructed of the same ...

. 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

History

Background

Starting in the early 1900s, Fillmore County began experimenting in designing bridges constructed entirely of concrete. Starting from around 1914, concrete became the exclusive construction material for bridges in the county. The main designs for the concrete bridges were arches and slab spans. This building style remained the main design for the county's bridges until 1920. The style was largely due to the state of Nebraska's reliance on concrete to construct bridges, which was believed to be more durable than steel, which was usually used to construct bridges at the time. Hess 1992, p. 3

Planning and construction

Fillmore County's reliance on concrete bridges began to decrease when it hired William A. Biba as its county engineer. Biba began experimenting with different bridge designs, and constructed all of the county's bridges until 1931. The first plan for a bridge over the Big Blue River's west fork was drawn up in June 1917. The bridge consisted of a single concrete arch in length, which would pass between Grafton Township's Sections 1 and 2. However, no documentation exists to show that the bridge was constructed. In early May 1918, the plan was introduced for the construction of the Big Blue River Bridge, engineered by Biba. The plan was approved by the County Commissioners Court later that month, and awarded a $4,250 contract (equivalent to $ respectively in ) to local contractor Frank N. Craven. He constructed the bridge later that year. Aside from minor maintenance repairs, the bridge has remained unaltered since its construction, and continues to carry vehicular traffic. Its condition is considered "good".

Significance

The Big Blue River Bridge was added to the National Register of Historic Places (NRHP) on June 29, 1992. The bridge was nominated under national register criteria C, relating to design and construction. The facility's historic significance is architecture and engineering with an area of significance under engineering. Its historic function is considered to be road-related transportation. The bridge's period of significance is 1918, with a significant date of 1918. The facility is considered to be the best example of about 30 concrete bridges constructed by Biba which remain, and is considered technologically significant due to the fact that it "retains a high degree of integrity of location, design, setting, materials, workmanship, feeling and association". It was one of the first designed by Biba.

References

;Footnotes ;Bibliography *

External links

*{{commons category-inline, Big Blue River bridge (Fillmore County Rd 6) Road bridges on the National Register of Historic Places in Nebraska Bridges completed in 1918 National Register of Historic Places in Fillmore County, Nebraska Arch bridges in the United States Concrete bridges in the United States Buildings and structures in Fillmore County, Nebraska