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BNSF SD-105 Bridge (W)

I-Beam Bridge over South Dakota Highway 105
North Sioux City, Union County, South Dakota

Click the Photo Above to See All Photos of This Bridge!
Name BNSF SD-105 Bridge (W)
Built By Chicago, Milwaukee St. Paul & Pacific Railway
Contractor Unknown
Currently Owned By BNSF Railway
Length 100 Feet Total, 35 Foot Main Span
Width 1 Track
Height Above Ground 12 Feet 5 Inches
Superstructure Type I-Beam and Trestle
Substructure Type Timber Pile
Date Built 1931
Traffic Count 3 Trains/Day (Estimated)
Current Status In Use
BNSF Bridge Number T-252 1/2
Significance Minimal Significance
In 1872, the Dakota Southern Railway constructed a 61 mile route between Sioux City, Iowa and Yankton, South Dakota.
In 1879, the railroad was merged with the Sioux City & Pembina Railway to form the Sioux City and Dakota Railroad, which was in turn controlled by the Chicago, Milwaukee and St. Paul Railway in 1881.

Known as the Milwaukee Road, construction continued with a line being built from Aberdeen, South Dakota to Ashton, South Dakota the same year.
By 1882, another segment from Mitchell to Letcher was built, as well as a segment from Yankton to Scotland.
The missing segments would be filled in during 1886, including from Ashton to Letcher and Mitchell to Scotland.
The route connected to other Milwaukee Road main lines at Aberdeen and Sioux City, as well as at Elk Point and Mitchell.

While this route crossed some of the best farm land in South Dakota, the Milwaukee Road oftentimes was in financial trouble. This was partially due to an expansion to the Pacific Ocean, completed in approximately 1908.

In 1913, the railroad was renamed the Chicago, Milwaukee St. Paul & Pacific Railway. This route saw little change until 1980, when a portion from Mitchell to Aberdeen was proposed for abandonment.

The State of South Dakota purchased the route, and granted Burlington Northern operation of the segment. In addition, BN bought the Mitchell-Sioux City segment.
BN would merge with the Atchison, Topeka & Santa Fe Railway to form BNSF Railway in 1996. Since 2005, BNSF has owned and operated the entire Aberdeen-Sioux City segment as the Aberdeen Subdivision.
06/16/22


This standard I-Beam bridge is the western crossing of South Dakota Highway 105 in North Sioux City.
Built in 1931, this structure and and its neighbor both consist of the same design, featuring an I-Beam with trestle approaches.
The entire bridge rests on wooden substructures.
Overall, the bridge remains in good condition.

The author has ranked the bridge as being minimally significant, due to the common design and newer age.
The photo above is an overview. The bridge is easily accessed from the road it crosses.

Citations

Source Type

Source

Build Date Milwaukee Road Archives at the Milwaukee Central Library
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele


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