BNSF US-18 Bridge (Hull)


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Name BNSF US-18 Bridge (Hull)
Great Northern Railway Bridge #171.7
Built By Great Northern Railway
Currently Owned By BNSF Railway
Superstructure Contractor Unknown
Substructure Contractor Bonesteel & Hyde of Watertown, South Dakota
Length 120 Feet Total, 40 Foot Spans
Width 1 Track
Height Above Ground 15 Feet (Estimated)
Superstructure Design Steel Stringer
Substructure Design Concrete
Date Built 1939
Traffic Count 10 Trains/Day (Estimated)
Current Status In Use
Great Northern Railway Bridge Number 171.7
BNSF Railway Bridge Number 171.68
Significance Local Significance
Documentation Date 9/25/2021

In 1887, the Willmar and Sioux Falls Railway Company (W&SF) began construction on a new 147 mile railroad line between Willmar, Minnesota and Sioux Falls, South Dakota. Construction would be completed by 1888. The following year, the Sioux City and Northern Railroad (SCN) Company began construction on 96 miles of new railroad, starting at Garretson, South Dakota and extending south to Sioux City, Iowa. An additional extension would be made in 1893, when the Sioux Falls, Yankton and South Western Railway Company (SFY&SW) constructed 58 miles of new railroad to Yankton, South Dakota. The SFY&SW would be sold to the W&SF in 1893, and the SCN would be sold to the W&SF in 1900. In 1907, Great Northern Railway (GN) purchased the W&SF. GN built and acquired an extensive railroad network throughout Minnesota.

GN operated this route as a mainline. The Sioux City leg of the route provided an important and competitive connection for stock yards at Sioux City to the Twin Cities. In 1970, GN merged with rival Northern Pacific Railway and Chicago, Burlington & Quincy Railroad to form Burlington Northern Railroad. The segment between Yankton and Irene was abandoned in 1981, and the segment between Irene and Sioux Falls was abandoned in 1982. BN was in turn merged with Atchison, Topeka & Santa Fe Railway in 1996, to form BNSF Railway. BNSF currently operates the Marshall Subdivision over the Willmar to Sioux City segment of this line, and the Corson Subdivision over the Garretson to Sioux Falls segment of this line.


Located west of Hull, this steel stringer bridge carries a former Great Northern Railway mainline over US Highway 18. In the 1930s, the Iowa Highway Commission began improving state-maintained highways throughout Iowa. One of the projects selected was to grade and improve US Highway 18 between Rock Valley and Perkins Corner. Contracts for the project were awarded in 1939, with construction completed that year. As part of the project, a new underpass would be constructed under the GN west of Hull and north of Perkins. Currently, the bridge consists of three 40-foot steel stringer spans, set onto concrete substructures. The superstructure follows a standard design, with six shallow beams spaced equally and an open deck. The substructures also follow a standard design, with rectangular piers and square abutments with short parallel wing walls. An unknown contractor fabricated the superstructure, while Bonesteel & Hyde constructed the substructures. Steel stringer spans were commonly used by railroads, as they were durable and easy to construct. The only significant alterations to the bridge came in the 1990s or early 2000s, when the outer beams of the main span were replaced, likely due to repeated truck strikes. Overall, the bridge appears to be in fair to good condition, with no significant deterioration noted. The author has ranked this bridge as being locally significant, due to the common design.


Citations

Build date Great Northern Railway Willmar Division Bridge List at the Minnesota Historical Society
Builder (substructure) The Alton Democrat; January 5, 1940
Railroad History Citation ICC Valuation Information, Compiled by Richard S. Steele

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