BNSF Hennepin Canal Bridge (Wyanet)


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Name BNSF Hennepin Canal Bridge (Wyanet)
Chicago, Burlington and Quincy Railroad Bridge #111.66
Built By Chicago, Burlington & Quincy Railroad
Currently Owned By BNSF Railway
Superstructure Contractor Chicago Bridge & Iron Works of Chicago, Illinois
Length 89 Feet Total
Width 2 Tracks
Height Above Ground 25 Feet (Estimated)
Superstructure Design Deck Plate Girder
Substructure Design Concrete
Date Built 1900
Traffic Count 25 Trains/Day (Estimated)
Current Status In Use
Chicago, Burlington & Quincy Railroad Bridge Number 111.66
BNSF Railway Bridge Number 111.66
Significance Local Significance
Documentation Date 10/29/2022

In 1852 and 1853, the Aurora Branch Railroad of the Chicago, Burlington & Quincy Railroad would construct a 46 miles of new railroad extending from Aurora, Illinois to Mendota, Illinois.  The railroad would be reorganized as the Chicago and Aurora Railroad Company in 1852, and again as the Chicago, Burlington & Quincy Railroad (CB&Q) in 1855.  Between 1852 and 1854, the Central Military Tract Railroad Company (CMT) would construct 79 miles from Mendota to Galesburg, Illinois.  The CMT would be absorbed into the CB&Q the following year.  This route quickly became the principal mainline of the CB&Q, providing a connection to the Mississippi River at Quincy.  Both Aurora and Galesburg would quickly become prominent railroad cities, with extensive facilities serving the CB&Q.  Because of the heavy traffic served by the line, the railroad would be double tracked beginning in the 1860s.  In 1868, a second track was added between Aurora and Bristol, and between Earlville and Mendota.  Between Bristol and Earlville, the line would be double tracked in 1872.  In 1877, the line was double tracked from Malden to Princeton and near Galeesburg; from Arlington to Malden would be double tracked in 1878; and the segments between Mendota and Arlington and Buda and Wyanet would be double tracked in 1880.  The segment between Buda and Galesburg would be double tracked in 1886, and the segment between Princeton and Wyanet was double tracked in 1899.  Throughout the 20th Century, the line continued to serve as the principal mainline of the CB&Q.  In 1970, the CB&Q was merged with the Northern Pacific Railway and the Great Northern Railway to form Burlington Northern Railroad (BN).  In 1996, BN merged with Atchison, Topeka & Santa Fe Railway to form BNSF Railway.  BNSF currently operates the line as the Mendota Subdivision, and it remains a critical line within the BNSF system.


Located southwest of Wyanet, this deck plate bridge carries the former CB&Q across the Hennepin Canal and Hennepin Canal Parkway Trail. Between 1890 and 1907, the United States Government constructed the Illinois & Mississippi Canal, later renamed the Hennepin Canal, to connect the Illinois and Mississippi Rivers. The new canal and feeder canal would require eight railroad bridges and sixty-three roadway bridges. Between 1899 and 1900, significant portions of the canal would be constructed in Bureau County, and a bridge carrying the CB&Q would be required. The bridge would be completed in 1900, and would consist of an 89-foot double track deck plate girder span, set onto concrete abutments. The girder span was fabricated by the Chicago Bridge & Iron Works, which was a smaller fabricator of bridges. In addition, the bridge was set at a moderate skew. This style of bridge was commonly used by railroads throughout the United States, as it was durable and easy to construct. Since the initial construction, the bridge has seen a number of repairs to the steel and substructures. Timber pile bents have been added underneath the bridge to provide extra support, likely because the bridge may be difficult to replace due to the recognized historic nature of the canal. Overall, the bridge appears to be in fair to poor condition, and is likely becoming obsolete for modern railroad traffic. Significant spalling to the concrete substructures was noted at the time of documentation. The author has ranked this bridge as being locally significant, due to the common design.


Citations

Builder and build date Annual reports of the Chief of the US Army Corps of Engineers for the fiscal year ended June 30, 1900; Volume 5
Railroad History Citation ICC Valuation Information, Compiled by Richard S. Steele

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