BNSF Ingrum Avenue Bridge


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Name BNSF Ingrum Avenue Bridge
Chicago, Burlington and Quincy Railroad Bridge #470.34
Built By Chicago, Burlington & Quincy Railroad
Currently Owned By BNSF Railway
Contractor George W. Condon of Omaha, Nebraska
Length 24 Feet Total
Width 2 Tracks
Height Above Ground 13 Feet 11 Inches
Superstructure Design Concrete Slab
Substructure Design Concrete
Date Built 1922
Traffic Count 25 Trains/Day (Estimated)
Current Status In Use
Chicago, Burlington & Quincy Railroad Bridge Number 470.34
BNSF Railway Bridge Number 470.34
Significance Local Significance
Documentation Date 11/28/2020

In May 1854, the Burlington and Missouri River Railroad (B&MR) began constructing a new mainline across southern Iowa, with the goal of connecting the Mississippi River at Burlington, Iowa to the Missouri River near Omaha, Nebraska.  In 1857, the first 34 miles between Burlington and the Skunk River near Rome, Iowa were completed.  In 1859, an additional 41 miles between the Skunk River and Ottumwa, Iowa were completed.  The railroad ceased progress during the Civil War, and eventually continued west in 1866.  That year, an additional 24 miles were completed between Ottumwa and Albia, Iowa.  Work continued in 1867, when an additional 46 miles were completed to Woodburn, Iowa.  Between 1867 and 1868, the Chicago, Burlington & Quincy Railroad (CB&Q) constructed a bridge across the Mississippi River to connect this line to their lines in Chicago.  In 1868, an additional 34 miles opened west to Afton, Iowa; followed by an additional 59 miles west to Red Oak, Iowa in 1869 and an additional 32 miles to the Pacific Junction, Iowa in 1870.  In 1872, the B&MR was leased by the CB&Q; and was fully absorbed by the company in 1875.  In the 1870s, the line would be extended into Nebraska, and in 1880, a bridge was constructed across the Missouri River at Plattsmouth.   

This line formed a critical backbone for the CB&Q, connecting Chicago to territories west of the Missouri River.  By the late 1870s, the need for a second track on this route had become apparent.  A second track was constructed between Chillicothe, Iowa and Albia in 1879, including a new alignment around the south side of Albia.  In 1880, a second track was constructed between Burlington and West Burlington, Iowa; as well as between Albia and Russell, Iowa.  In 1885, a second track was constructed between Russell and Chariton, Iowa; followed by between Ottumwa and Chillicothe the following year.  A large segment of second track opened between West Burlington and Mt. Pleasant, Iowa in 1889.  By the turn of the 20th Century, several sections of this line required extensive upgrades in addition to a second track.  In 1900, a second track was completed from Mt. Pleasant to Ottumwa and from Chariton to Creston, Iowa.  A new alignment was constructed between Fairfield, Iowa and Batavia, Iowa; and between Agency, Iowa and Ottumwa in 1900.  In 1901, the line was double tracked between Chariton and Creston.  The 1901 work involved constructing a second single track alignment between Indianola Junction and Lucas, Iowa; between Woodburn and Osceola, Iowa and between Murray, Iowa and Creston.  Between 1902 and 1905, the Creston to Pacific Junction segment was double tracked.  In 1904, a realignment between Nodaway, Iowa and Emerson, Iowa opened to traffic; followed by a large realignment between Malvern, Iowa and Pacific Junction in 1905.

Throughout the 20th Century, this line remained critical to the CB&Q.  The CB&Q invested significant capital into maintaining this line, replacing bridges, revising grades and changing the alignment in spots.  One of the most prominent changes came in 1949, when the westbound track near Frederic, Iowa was straightened, to eliminate a segment of curvy original mainline.  In 1970, CB&Q merged with Northern Pacific Railway and Great Northern Railway to form Burlington Northern Railroad (BN).  Several segments of this line were single tracked in the mid to late 20th Century.  In 1996, BN merged with Atchison, Topeka & Santa Fe Railway to form BNSF Railway, the current owner of this line.  Today, this line remains a critical piece of railroad infrastructure.  BNSF currently operates a portion of the Ottumwa Subdivision between Burlington and Creston; and a portion of the Creston Subdivision between Creston and Pacific Junction.  


Located on the east side of Glenwood, this concrete slab bridge carries a former Chicago, Burlington & Quincy Railroad mainline over Ingrum Avenue/County Road H30 (former US Highway 34). Originally, the CB&Q mainline took a different route into Glenwood, following what is now Ingrum Avenue and crossing under the present line at this location. Between 1902 and 1903, the CB&Q undertook a major project to rebuild the mainline through western Iowa, realigning the route and constructing a second track. It is believed a temporary trestle was constructed at this location to allow for the construction of the new line, and was filled upon completion. The original railroad grade was then sold to Mills County for use as a roadway. As automobiles became more prominent, Ingrum Avenue became the main roadway into Glenwood. In late 1921, contracts were awarded for a new underpass at this location, with construction occurring during the 1922 construction season. Ingrum Avenue was later designated as US Highway 34, and remained as such until US Highway 34 was rerouted around Glenwood in the early 1970s. Currently, the bridge consists of a double track 24-foot concrete slab span, set onto concrete abutments. The bridge follows a standard design, and appears to have been constructed monolithically. The superstructure uses shallow headwalls and chamfered edges at the abutments. The substructure uses a standard design, with sloped wing walls extending parallel to the roadway. George W. Condon completed the construction of the bridge. Concrete slab spans were popular for railroad use, 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 no significant deterioration noted. The author has ranked the bridge as being locally significant, due to the common design.


Citations

Builder and build date The Malvern Leader; December 1, 1921
Railroad History Citation ICC Valuation Information, Compiled by Richard S. Steele

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