IAIS Franklin Avenue Bridge


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Name IAIS Franklin Avenue Bridge
Chicago Great Western Railway Bridge #500.96
Built By Chicago, Rock Island & Pacific Railroad
Currently Owned By Iowa Interstate Railroad
Superstructure Contractor American Bridge Company of New York
Length 156 Feet Total, 44 Foot Main Span
Width 1 Track
Height Above Ground 15 Feet (Estimated)
Superstructure Design Deck Plate Girder and Concrete Modular Girder
Substructure Design Steel Pile
Date Built 1969 Using a Span Fabricated 1902; Approaches Reconstructed 2014
Original Location Unknown
Traffic Count 3 Trains/Day (Estimated)
Current Status In Use
Chicago Great Western Railway Bridge Number 500.96 (Old #D-195)
Iowa Interstate Railroad Bridge Number 485.17
Significance Local Significance
Documentation Date 1/27/2017

In 1886, the Mason City & Fort Dodge Railroad (MC&FD) constructed 73 miles of new railroad, extending from Mason City, Iowa to Fort Dodge, Iowa.  In 1901, the MC&FD was leased by the Chicago Great Western Railway (CGW).  Between 1902 and 1903, the MC&FD constructed 133 miles of new railroad, extending from Fort Dodge, Iowa to Council Bluffs, Iowa.  The CGW would be reorganized as the Chicago Great Western Railroad in 1909, and maintained a lease of the MC&FD property.  The CGW had acquired and constructed a modest railroad network throughout Illinois, Iowa, Minnesota and Missouri; connecting major cities in these states.  The CGW was one of the smaller railroads in the area, and was late to develop lines.  As a result, the railroad never saw the fortunes of other railroads in the area.  This line served as a principal mainline for the CGW, serving agricultural industries and providing a connection to terminals at Omaha, Nebraska.  In the early 20th Century, the CGW was often surviving on razor-thin profit margins.  In 1940, the CGW entered bankruptcy, and was again reorganized as the Chicago Great Western Railway.  At this time, the MC&FD was formally merged into the CGW.  After the bankruptcy, the CGW became an innovative railroad, pioneering intermodal service and becoming one of the first railroads to completely switch to diesel locomotives.  A capital improvement program was launched in 1949, which sought to rebuild and rehabilitate deteriorated infrastructure.  

In 1953, the Chicago, Rock Island & Pacific Railroad (Rock Island) began using a segment between McClelland, Iowa and Council Bluffs.  In 1968, the CGW was purchased by the Chicago & North Western Railway (C&NW). The C&NW already owned a better constructed route serving Council Bluffs, and much of this line became excess for the C&NW.  In 1971, a section of the line between Harlan and Council Bluffs was abandoned, and the McClelland to Council Bluffs segment sold to the Rock Island.  An additional segment between Somers and Carroll was abandoned in 1977, followed by a section between Manning and Harlan in 1981 and a section between Carroll and Manning in 1983.  After the Rock Island went bankrupt in 1980, the McClelland to Council Bluffs segment became part of the Iowa Interstate Railroad (IAIS).  In 1995, the C&NW was purchased by Union Pacific Railroad (UP).  UP abandoned a section of the line between Thornton and Belmond in 2000, followed by a section between Mason City and Thornton in 2007 and a section between Roelyn and Somers in 2008.  Today, UP operates the Fort Dodge Subdivision between Belmond and Roelyn and IAIS operates a short segment of the Council Bluffs Subdivision between McClelland and Council Blufffs.  The segment between Mason City and Belmond was acquired for trail use, and portions of the right-of-way have been reused as part of the Prairie Land Trail.  The remainder of the line has largely reverted to adjacent landowners, and has been converted to farm fields.


Located near Interstate 80 on the east side of Council Bluffs, this deck plate girder bridge carries a former Chicago Great Western Railway mainline over Franklin Avenue. The first bridge at this location consisted of a timber pile trestle, constructed in 1902. In 1925, a roadway was installed under the bridge, and a 19-foot steel stringer span was installed. This main span provided a single roadway lane. As traffic on Franklin Avenue grew in the mid-20th Century, Pottawattamie County and Council Bluffs began to explore options to improve the bridge. As part of the agreement between the CGW and Rock Island allowing the Rock Island to operate over this line, the Rock Island was responsible for all maintenance. In 1968, the county reached an agreement with the Rock Island to replace the center section of the bridge with a longer span to allow for a two-lane roadway to be constructed. Work on the structure was completed during the summer of 1969, with the Rock Island billing the county for the material and labor. The most recent alterations to the bridge came in 2014, when the timber approaches were replaced by modern spans, giving the bridge its present configuration.

Currently, the bridge consists of a 44-foot deck plate girder span, approached by one modular concrete girder span on the south end and three modular concrete girder spans on the north end. The entire bridge is set onto steel pile piers. The deck plate girder span was originally fabricated in 1902 for the Rock Island for use at an unknown location. This span follows a standard design, with two modest sized girders and an open deck. The approaches also use a standard design, consisting of modern hollow modular concrete girder spans. All of the substructures use steel piles and concrete caps, and it appears that the main piers were constructed in the 1980s or 1990s. American Bridge Company fabricated the superstructure, while the remainder of the bridge was constructed by railroad company forces and an unknown contractor. Deck plate girder spans were popular for railroad use, as they were durable and easy to construct. Since the 2014 reconstruction, the bridge has seen no significant alterations, and remains in regular use. Overall, the bridge appears to be in fair to good condition, with no significant deterioration noted. The author has ranked the bridge as being locally significant, due to the common design.


Citations

Fabrication date and builder (superstructure) American Bridge Company plaque
Erection date The Daily Nompareil; October 13, 1969
Railroad History Citation ICC Valuation Information, Compiled by Richard S. Steele

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