| Name | BNSF Crow Creek Bridge (Fairfield) Chicago, Burlington and Quincy Railroad Bridge #254.51 |
| Built By | Chicago, Burlington & Quincy Railroad |
| Currently Owned By | BNSF Railway |
| Superstructure Contractor | Lassig Bridge & Iron Works of Chicago, Illinois |
| Substructure Builder | Chicago, Burlington & Quincy Railroad Company Forces |
| Length | 215 Feet Total, 65 Foot Main Spans |
| Width | 2 Tracks |
| Height Above Ground | 30 Feet (Estimated) |
| Superstructure Design | Deck Plate Girder and Concrete Modular Girder |
| Substructure Design | Concrete and Steel Tower |
| Date Built | 1899; Approaches Reconstructed c. 2000 |
| Traffic Count | 25 Trains/Day (Estimated) |
| Current Status | In Use |
| Chicago, Burlington & Quincy Railroad Bridge Number | 254.51 |
| BNSF Railway Bridge Number | 254.51 |
| Significance | Local Significance |
| Documentation Date | 10/22/2016 |
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 Fairfield, this deck plate girder viaduct carries a former Chicago, Burlington & Quincy Railroad mainline over Crow Creek. Originally, the CB&Q crossed Crow Creek approximately 1,700 feet southeast, near the location of a present-day trail bridge. The first bridge at that location was likely a timber pile trestle bridge, constructed when the line was first built. It is believed that bridge was upgraded with an iron truss or girder span during the late 1870s or early 1880s. Between 1899 and 1904, the CB&Q realigned and double tracked their mainline through southern Iowa. As part of the work, a significant portion of the railroad on either side of Fairfield was realigned, and a new bridge was constructed over Crow Creek. Originally, the bridge consisted of a deck plate girder structure with short timber pile trestle approaches on either end. This was a common way to allow for approach embankments to settle without damaging steel or concrete portions of the bridge. By 1911, the approach embankments had settled, and a new concrete pier and concrete abutment were constructed at each end, and a 25-foot concrete slab span was installed. In approximately 2000, the original approaches had become deteriorated, and were replaced by a new concrete modular girder span, set onto the existing substructures. Currently, the bridge consists of two 65-foot and one 35-foot deck plate girder spans, approached by a 25-foot concrete modular girder span on either end. The bridge is supported by concrete piers, abutments and pedestals and includes one tower at the center of the structure.
The superstructure follows a design commonly used along this line, with different sized girders for the main spans and tower spans. Each main span consists of a traditionally composed deck girder, with two heavy plate girders per track and an open deck. The tower span is notably lighter, but uses a similar design. The tower is constructed of four angled posts, with a transverse plate girder at each side. Each post is composed of a built-up beam with V-lacing on the interior and a solid plate on the exterior. Both longitudinal and lateral bracing is present, and is composed of light built-up beams. Both the piers and abutments use a standard rectangular shape, and the tower pedestals use a standard square shape. Lassig Bridge & Iron Works fabricated the superstructure, while the concrete was constructed by railroad company forces. Deck plate girder spans were popular for railroad use, as they were durable and easy to construct. Deck plate girder viaducts were also popular, particularly for tall and/or long bridges. Since the c. 2000 alterations, the bridge has seen no significant changes 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 this bridge as being locally significant, due to the common design.
Citations
| Build date | Chicago, Burlington & Quincy Railroad Valuation Summary at the Newberry Library |
| Builder (superstructure) | Missing Lassig Bridge & Iron Works plaque |
| Railroad History Citation | ICC Valuation Information, Compiled by Richard S. Steele |