SKOL Neosho River Bridge (Oswego)


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Name SKOL Neosho River Bridge (Oswego)
St. Louis-San Francisco Railway Bridge #F356.1
Built By St. Louis-San Francisco Railway
Currently Owned By South Kansas & Oklahoma Railroad
Superstructure Contractor King Bridge Company of Cleveland, Ohio (Truss/East Approach)
Unknown (West Approach)
Engineer (Truss Design) Julius W. Schaub
Length 277 Feet Total, 153 Foot Main Span
Width 1 Track
Height Above Ground 20 Feet (Estimated)
Superstructure Design Schaub Variant Through Truss, Deck Plate Girder and Steel Stringer
Substructure Design Concrete and Concrete Pile
Date Built 1905, West Approach Added 1962
Traffic Count 2 Trains/Day (Estimated)
Current Status In Use
St. Louis-San Francisco Railway Bridge Number F356.1
South Kansas & Oklahoma Railroad Bridge Number 356.10
Significance Moderate Significance
Documentation Date 10/28/2017

In 1872, the Memphis, Carthage & Northwestern Railroad (MC&NW) constructed a 26 mile railroad line, extending from Pierce City, Missouri to Carthage, Missouri.  The following year, an additional 20 miles was constructed to Brownsville, Kansas.  The MC&NW would be sold to the Missouri & Western Railway (M&W) in 1877.  The M&W would construct an additional 27 miles to Oswego, Kansas; before it was merged into the St. Louis and San Francisco Railway Company (Frisco) in 1879.  In 1879, the St. Louis, Wichita & Western Railway (StlW&W) constructed 61 miles of new railroad to New Albany, Kansas; followed by 81 miles to Wichita, Kansas in 1880.  The StlW&W would be sold to the Frisco in 1882.  An additional 106 miles was constructed to Ellsworth by the Kansas Midland Railway, which would be acquired by the Frisco in 1900.  The railroad reorganized as the St. Louis-San Francisco Railroad in 1896, and reorganized again as the St. Louis-San Francisco Railway in 1916. The Frisco would build and acquire a respectable railroad network in the south central United States, with significant connections through Arkansas, Kansas, Missouri, Oklahoma and Texas.  This route served as the primary route through southern Kansas for the Frisco. 

The Frisco was merged into the Burlington Northern Railroad (BN) in 1980.  This route became downgraded through the 1980s, as it paralleled other routes.  In 1986, segments from Medora to Lyons and Lorraine to Ellsoworth were abandoned, followed by the Valley Center to Medora segment in 1994.  A segment from Lyons to Lorraine would be sold to the Atchison, Topeka & Santa Fe Railway (ATSF) in 1994.  BN merged with the ATSF in 1996 to form BNSF Railway.  In 1997, BNSF sold the Columbus to Severy segment to the South Kansas & Oklahoma Railroad (SKOL), as well as the Lyons to Lorraine segment to the Central Kansas Railway.  A portion of the line near Carthage was sold to the Missouri & North Arkansas Railroad (MNA) in 1998.  The Central Kansas Railway became part of the Watco owned Kansas & Oklahoma Railroad in 2000.  In 2000, the Augusta to Severy segment would be abandoned, followed by the Lyons to Lorraine segment in 2001, the Carthage to Columbus segment in 2002, the Wichita to Valley Center segment in 2003 and Fredonia to Severy segment in 2004.  Today, BNSF operates a segment from Pierce City to near Carthage as the Pierce City Industrial Lead.  From that point to Carthage is operated by the MNA.  In addition, SKOL operates a segment from Columbus to Fredonia.  A portion of the line from Fredonia to Severy was abandoned in 2004.  Portions of this line have been railbanked for future trail use.


View an article discussing the Schaub variant truss.

Located along US Highway 160 east of Oswego, this unique through truss bridge carries the South Kansas & Oklahoma Railroad over the Neosho River. Built in 1905, the bridge features a 153-foot 6-panel pin-connected Schaub variant through truss span, approached by a 24-foot deck plate girder span on the east end. The west end was originally approached by timber trestle spans, and the bridge is set onto concrete and concrete pile substructures. The truss utilizes a "bubble cutout" portal, typical of King Bridge Company spans constructed for the Frisco during this era. The members of the bridge are laced, typical of Schaub variant trusses.

The Schaub Variant truss was developed in 1901 by Julius W. Schaub, a Chicago based bridge engineer. The Schaub variant truss was designed to provide a truss design which would be used for medium length spans. The design utilizes a Warren design with subpanels, and a combination of riveted and pinned connections. The location of the riveted connections prevented any movement of the pins in the pinned connections. The design was used by the St. Louis-San Francisco Railway, the Missouri Pacific Railway, and the Iowa Central Railway (later Minneapolis & St. Louis Railway). A number of Schaub variant trusses were built, in different sizes, configurations and with different connections. Several contractors also fabricated the various spans. More information about this innovative design can be found at the link above.

Since the initial construction, the bridge has seen few changes. The original timber trestle west approach was replaced by two 50-foot steel stringer spans, set onto concrete pile substructures in 1962. No visible repairs have been made to structural components of the truss span. Overall, the bridge appears to be in fair to good condition, with no significant deterioration noted. The author has ranked this bridge as being highly significant, as it is one of relatively few remaining examples of a Schaub variant through truss.


Citations

Builder and build date (main spans) King Bridge Company plaque
Build date (west approach) Date stamp
Railroad History Citation ICC Valuation Information, Compiled by Richard S. Steele

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