UP E. Fork Sni-A-Bar Creek Bridge


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Name UP E. Fork Sni-A-Bar Creek Bridge
Missouri Pacific Railroad Bridge #149
Built By Missouri Pacific Railroad
Currently Owned By Union Pacific Railroad
Superstructure Contractor Unknown
Length 316 Feet Total, 100 Foot Main Span
Width 1 Track
Height Above Ground 15 Feet (Estimated)
Superstructure Design Deck Plate Girder and Concrete Deck Girder
Substructure Design Concrete
Date Built 1931
Traffic Count 10 Trains/Day (Estimated)
Current Status In Use
Missouri Pacific Railroad Bridge Number 149
Union Pacific Railroad Bridge Number 252.70
Significance Local Significance
Documentation Date 8/26/2017

In 1873, the Wyandotte, Kansas City & Northwestern Railway constructed a 30-foot gauge railroad, extending from Independence, Missouri to Lexington, Missouri; a distance of 43 miles.  The railroad was sold to the Kansas & Eastern Railway in 1878, and was merged into the Missouri Pacific Railway (MP) in 1880.  The newly formed MP had acquired a large amount of track throughout Missouri and Kansas.  The principal mainline of the railroad extended from St. Louis to Kansas City, via Jefferson, Sedalia and Independence.  In 1888, the MP constructed an additional 77 miles to Boonville, Missouri.  In 1902, an additional 43 miles were completed between Boonville and Jefferson City, as well as an additional 5 miles between west of Lake City and a junction with the Atchison, Topeka & Santa Fe Railway, where the line would use trackage rights over the well built ATSF to reach Kansas City.  The newly completed route formed a bypass of the congested mainline through western Missouri. The railroad reorganized to the Missouri Pacific Railroad in 1917.  A segment of the line between Independence and Lake City was abandoned in approximately 1979.  The MP was merged into the Union Pacific Railroad (UP) in 1982.  Today, Union Pacific continues to operate the line as the River Subdivision, and the remaining spur in Independence as the Pixley Industrial Lead.


Located on the east side of Wellington, this deck plate girder bridge carries the railroad over the East Fork Sni-A-Bar Creek north of Missouri Route 224. The first bridge at this location was likely a lightweight timber truss. In 1931, the Missouri Pacific undertook a realignment of this line in several locations near Wellington to improve curvature and flooding concerns. A new bridge would be constructed further downstream. This new bridge utilized a 100-foot and two 80-foot deck plate girder spans, approached by a 28-foot concrete span on either end. The entire bridge would be set onto concrete substructures. The approach spans utilize a typical Missouri Pacific design, and were referred to as concrete slabs in railroad documents. The approaches function as concrete deck girders, utilizing a monolithically cast concrete deck, girders, pier and abutment. These spans are closely related to skeleton abutments, and were used to provide greater stability on embankments. The main drawback of these spans is the labor required to cast the approaches in one continuous pour. The deck girder spans utilize a design commonly used by American railroads. The 100-foot center deck girder span is longer than average. 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 Railway Age; Volume 92, Issue 1
Railroad History Citation ICC Valuation Information, Compiled by Richard S. Steele

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