| Name | UP 2nd Avenue Bridge (Des Moines) Des Moines & Central Iowa Railway Bridge #314 |
| Built By | Des Moines & Central Iowa Railway |
| Currently Owned By | Union Pacific Railroad |
| Superstructure Contractor | Unknown |
| Length | 181 Feet Total, 33 Foot Main Spans |
| Width | 1 Track |
| Height Above Ground | 13 Feet 4 Inches |
| Superstructure Design | Steel Stringer and Timber Pile Trestle |
| Substructure Design | Timber Pile |
| Date Built | 1942 |
| Traffic Count | Less Than 1 Train/Day (Estimated) |
| Current Status | In Use |
| Des Moines & Central Iowa Railway Bridge Number | 314 |
| Union Pacific Railroad Bridge Number | 314 |
| Significance | Local Significance |
| Documentation Date | 11/10/2012; 9/29/2017 |
In the late 19th and early 20th Centuries, electric interurban railways became popular throughout the United States, particularly in suburban and rural areas. In rural areas, the interurban represented a reliable form of transportation, independent of the steam railroads. In 1899, the Inter-Urban Railway (IUR) constructed a short line from downtown Des Moines, Iowa to the Highland Park area of Des Moines. In 1903, an extension opened east to Colfax, Iowa. Initially, the railroad was popular with passengers traveling between Des Moines and Colfax, and it also served some coal mines in the area. In 1906, the 34-mile Beaver Valley Division was constructed between Highland Park and Perry, Iowa; and also featured a short 3-mile branch to Woodward, Iowa. The IUR became a profitable freight interchange for larger steam railroads operating in the Des Moines area. The IUR also served Camp Dodge, a large Army installation on the north side of Johnston, Iowa. In 1922, the IUR was reorganized as the Des Moines & Central Iowa Railway (DCI).
By the mid-20th Century, transportation in the United States had changed. Automobiles had become the preferred mode of transportation, and electrified interurban railroads were quickly dying. The DCI went bankrupt in 1946, and abandoned the line to Colfax and the branch to Woodward. The railroad was sold to Murray M. Salzberg, a New York scrap dealer in 1949. Salzberg decided to dieselize the line and eliminate passenger service. The segment between Perry and Granger, Iowa was abandoned in 1952. In 1968, the DCI was purchased by the Chicago & North Western Railway (C&NW), which operated an extensive network of railroad lines throughout Iowa. Many sections of this line were excess for the C&NW, and retained only to serve local industries. The segment between Camp Dodge and Granger was abandoned in 1980, followed by the segment between Flint Junction and Camp Dodge in 1982. Another segment between Highland Park and NW 2nd Street in Des Moines was abandoned in 1984. In 1995, the C&NW was purchased by Union Pacific Railroad (UP). Today, UP operates a segment on the north side of Des Moines; while the Colfax, Woodward and Perry branches have been entirely abandoned. A large section between Highland Park and Camp Dodge has been reused as a trail.
Located on the north side of Des Moines, this steel stringer and timber pile trestle bridge carries a former Des Moines & Central Iowa Railway line over Iowa Highway 415 (2nd Avenue) and an unnamed creek. Prior to the construction of this bridge, there was no roadway at this location. With the United States entering World War II in late 1941, it was decided to construct an ordnance plant on the north side of Des Moines. As part of the project, 2nd Avenue would be extended as a four-lane roadway, and a new underpass would be constructed. Work on the project began in 1942, and was completed by October of that year. Currently, the bridge consists of two 33-foot steel stringer spans, approached by two timber pile trestle spans on the west end and six timber pile trestle spans on the east end. The entire bridge is set onto timber pile substructures. The main spans follow a standard design, consisting of four shallow beams which are equally spaced. The timber components of the bridge also constructed using a standard design. An unknown contractor fabricated the beam spans, and it is unclear if the timber portions of the bridge were constructed by railroad company forces or by an unknown contractor. Steel stringer and timber pile trestle bridges are exceeding common through the United States, as they were economical and easy to construct. Since the initial construction, the bridge has seen no significant alterations, and now remains in use to serve the Firestone Tire plant to the west. The bridge has been damaged several times by oversized vehicles knocking the spans off the piers, most notably in 2026. Each time, the damaged span is picked off the ground and reinstalled. 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 | The Des Moines Register; October 18, 1942 |
| Railroad History Citation | ICC Valuation Information, Compiled by Richard S. Steele |