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| Name | Bruce Vento Nature Trail - 4th Street Bridge Northern Pacific Railway Bridge #0.1 |
| Built By | Northern Pacific Railway |
| Currently Owned By | Ramsey County Regional Railroad Authority |
| Superstructure Contractor | Lassig Bridge & Iron Works of Chicago (Girder Spans) Unknown (South Span) |
| Length | 78 Feet Total, 29 Foot Main Spans |
| Width | 2 Tracks |
| Height Above Ground | 15 Feet (Estimated) |
| Superstructure Design | Deck Plate Girder and Steel Stringer |
| Substructure Design | Stone Masonry and Steel Bent |
| Date Built | 1880 (South Span) 1893 (Deck Girder Span) |
| Traffic Count | 0 Trains/Day (Bridge is a Trail) |
| Current Status | Open to trail traffic |
| Northern Pacific Railway Bridge Number | 0.1 |
| Significance | Moderate Significance |
| Documentation Date | 3/26/2014 |
In 1867, the Lake Superior and Mississippi Railroad (LS&M) began construction on a new railroad line, extending north from St. Paul, Minnesota to Duluth, Minnesota; a distance of 155 miles. The LS&M was sold to the St. Paul and Duluth Railroad (StP&D) in 1877. Known as the "Skally Line", the line became a principal connection between the Twin Ports of Duluth, Minnesota and Superior, Wisconsin. A major line change was completed in 1888, when the "Duluth Short Line" was constructed between Thomson and Duluth, and the original line reduced to a spur. The StP&D would be sold to the Northern Pacific Railway (NP) in 1900. NP operated this as their mainline between the Twin Cities and the Twin Ports. NP had a large network of railroad lines in Minnesota, and also had a network that extended to the Pacific Coast at Seattle.
In 1970, NP would merge with rival Great Northern Railway (GN) and the Chicago, Burlington & Quincy to form Burlington Northern Railroad (BN). The GN had a parallel route, and BN quickly began to favor that route. The first section abandoned was between Carlton and West Duluth in 1976. Further cuts came in 1977, when the segment between Hinckley and Moose Lake was abandoned. By 1980, the Moose Lake to Carlton segment would be abandoned. The segment between Hugo and Forest Lake would be abandoned 1987, and the segments from Forest Lake to North Branch and White Bear Lake to St. Paul abandoned in 1989. All of the abandoned segments would be acquired for recreational trail use. In 1996, BN merged with the Atchison, Topeka & Santa Fe Railway to form BNSF Railway. In 1997, BNSF would sell the Hinckley-North Branch segment to the St. Croix Valley Railroad (SCXY).
Today, the Minnesota Commercial operates a small segment from Hugo to I-694 and SCXY continues to operate the Hinckley-North branch segment. The Bruce Vento Trail utilizes the former railroad grade between St. Paul and I-694, while the Sunrise Prairie Trail utilizes the grade between Hugo and North Branch, and the Willard Munger State Trail utilizes the railroad between Hinckley and West Duluth. BNSF continues to operate small amounts of track in Duluth.
Located in St. Paul, this bridge is one of four parallel structures which cross 4th Street. Originally built in 1868 to serve the White Bear Lake line, the bridge has been upgraded since. The current bridge was constructed in 1893, and consists of two 29-foot deck plate girder spans, and approached by an 18-foot steel stringer span. The bridge is set onto steel bents and stone footings and abutments. The steel stringer span was reportedly fabricated in 1880, making it the oldest component of this bridge. It is unknown if the stringer span was originally located here, or if it was moved from elsewhere. This design of bridge was commonly used by railroads throughout the United States, as it was durable and easy to construct. The bridge was reportedly strengthened in 1941. Currently, it serves the Bruce Vento Nature Trail. Overall, the bridge appears to be in fair condition, with no significant deterioration noted. The author has ranked this bridge as being moderately significant, due to the older age.
Citations
| Build Date | St. Paul Division Bridge Book at the Northern Pacific Railway Historical Association Archives |
| Builder (main span) | Missing Lassig Bridge & Iron Works plaque |
| Railroad History Citation | ICC Valuation Information, Compiled by Richard S. Steele |