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| Name | UP Bridge #234.31 Chicago & North Western Railway Bridge #784 |
| Built By | Chicago, St. Paul, Minneapolis & Omaha Railway |
| Currently Owned By | Union Pacific Railroad |
| Superstructure Contractor | American Bridge Company of New York |
| Substructure Contractor | Cleary-White Construction Company of Chicago, Illinois |
| Length | 50 Feet Total |
| Width | 1 Track |
| Height Above Ground | 15 Feet (Estimated) |
| Superstructure Design | Deck Plate Girder |
| Substructure Design | Concrete |
| Date Built | 1913 |
| Traffic Count | 5 Trains/Day (Estimated) |
| Current Status | In Use |
| Chicago & North Western Railway Bridge Number | 784 |
| Union Pacific Railroad Bridge Number | 234.31 |
| Significance | Local Significance |
| Documentation Date | 11/23/2019 |
In 1865, the Minnesota Valley Railway Company (MVR) began construction on a new railroad line between Mendota, Minnesota and St. James, Minnesota. In 1865, the first 22 miles were completed between Mendota, Minnesota and Merriam Junction, Minnesota; followed by 17 additional miles to Belle Plaine, Minnesota in 1866. In 1867, the MVR completed an additional 16 miles to Le Sueur, Minnesota; followed by 12 additional miles to Kasota, Minnesota in 1868. In 1869, the MVR completed an additional 22 miles to Lake Crystal, Minnesota. The same year, an additional 5 miles would be completed between St. Paul, Minnesota and Mendota. In 1870, the MVR would be purchased by the St. Paul and Sioux City Railroad (StP&SC). 22 additional miles to St. James, Minnesota would be completed in 1870. The StP&SC completed 58 more miles from St. James to Worthington, Minnesota in 1871; and 64 additional miles to Le Mars, Iowa were completed in 1872. At Le Mars, the route connected to an existing railroad, over which the StP&SC used trackage rights to reach Sioux City, Iowa.
In 1881, the StP&SC would be sold to the Chicago, St. Paul, Minneapolis & Omaha Railway (Omaha Road). The Omaha Road would come under control of the Chicago & North Western Railway (C&NW) the next year. The C&NW had developed a large network of railroad lines in the Midwest, with the Omaha Road serving as the northern extent of the company. This route became the main line of the Western District of the Omaha Road. Several improvements were made to the line in the late 19th and early 20th Centuries. Between 1898 and 1906, several sections of the line were realigned between Blakeley, Minnesota and Mankato. In 1957, the C&NW leased the Omaha Road, and the C&NW purchased the company in 1972. The C&NW was purchased by Union Pacific Railroad (UP) in 1995. UP still operates the St. Paul to St. James segment as the Mankato Subdivision and the St. James to Sioux City segment as the Worthington Subdivision. The line remains a mainline for UP, connecting St. Paul to Sioux City and providing UP with a mainline into the Twin Cities.
Located along Iowa Highway 60 between Seney and Carnes, this deck plate girder bridge carries the former Chicago, St. Paul, Minneapolis & Omaha Railway (Omaha Road) mainline over an unnamed creek. The first bridge at this location consisted of a timber pile trestle, which had been periodically renewed since the line was first constructed. During the early 20th Century, the Omaha Road invested significant capital into this line, replacing timber bridges with steel, stone and concrete structures. In late 1913, the original bridge at this location was replaced by the present structure. Currently, the bridge consists of a single 50-foot deck plate girder span, set onto concrete abutments. The superstructure follows a standard design, with two heavy plate girders. The abutments also use a standard design, with stepped back walls and sloped wing walls. American Bridge Company fabricated the superstructure, while the Cleary-White Construction Company constructed the abutments. Deck plate girder spans were commonly used by railroads, as they were durable and easy to construct. Since the initial construction, the bridge has seen no significant alterations, and remains in regular use. Overall, the bridge appears to be in fair to good condition, with some spalling and deterioration noted to the concrete substructures. The author has ranked this bridge as being locally significant, due to the common design.
Citations
| Builders and build date | Chicago, St. Paul, Minneapolis & Omaha Railway Contract Records for Valuation Section Iowa-1 at the Chicago & North Western Historical Society Archives |
| Railroad History Citation | ICC Valuation Information, Compiled by Richard S. Steele |