| Name | Hanley Falls Railroad Bridge (West) Minneapolis & St. Louis Railway Bridge #69 |
| Built By | Minneapolis & St. Louis Railway |
| Currently Owned By | BNSF Railway |
| Superstructure Contractor | Unknown (West Span) Unknown (River Spans) |
| Substructure Contractor | Dunnigan Construction Company of St. Paul, Minnesota |
| Length | 434 Feet Total, 39 Foot Main Span |
| Width | 1 Track |
| Height Above Ground | 20 Feet (Estimated) |
| Superstructure Design | Through Plate Girder, Steel Stringer and Timber Pile Trestle |
| Substructure Design | Concrete, Steel Pile and Timber Pile |
| Date Fabricated | c. 1930 (West Span) c. 1930 (River Spans) |
| Date Erected | 1940 (West Span) 2020 (River Spans) |
| Original Location | Unknown (Spans #1 and #3) Unknown (Span #2) |
| Traffic Count | 2 Trains/Day (Estimated) |
| Current Status | In Use |
| Minneapolis & St. Louis Railway Bridge Number | 69 |
| BNSF Railway Bridge Number | 146.0 |
| Significance | Local Significance |
| Documentation Date | 8/26/2012 |
In 1882, the Minneapolis & St. Louis Railway Company of Minnesota and Iowa (M&StL) constructed a 93 mile railroad between Hopkins, Minnesota and Morton, Minnesota. At the same time, the Wisconsin, Minnesota & Pacific Railway (WM&P) would construct 123 additional miles of new railroad between Morton and Watertown, South Dakota. The M&StL would reorganize as the Minneapolis & St. Louis Railroad in 1895. The WM&P sold the Morton to Watertown line to the M&StL in 1899. The line was used as a secondary route, connecting to the M&StL mainline at Hopkins. In 1908, an additional 228 miles would be constructed from Watertown to LeBeau, South Dakota by the Dakota, Minnesota & Pacific Railway Company. Initial work began on a bridge across the Missouri River at LeBeau, but the work was quickly abandoned. This company would be sold to the M&StL in 1912. The M&StL would be reorganized as the Minneapolis & St. Louis Railway in the 1920s.
Due to a severe drought, LeBeau became a ghost town, and the line from Akaska to LeBeau was abandoned in 1924, followed by the segment from Conde to Akaska in 1940. In 1960, the M&StL was purchased by the Chicago & North Western Railway (C&NW). The line was often in disrepair, especially after it was purchased by the C&NW. Further abandonments to the line came in 1969, when the segment between Revillo, South Dakota and Watertown, South Dakota was abandoned. In 1970, the line between Madison, Minnesota and Revillo would be abandoned, and the remaining line to Conde would be abandoned in 1977. The Hanley Falls to Madison segment was sold to the Burlington Northern Railroad in 1970, and the portion between Hopkins and Norwood would be abandoned in 1980. The Hopkins to Norwood segment was purchased by Carver and Hennepin Counties, and reused as the Lake Minnetonka Regional Trail. By 1982, the remaining segment between Norwood and Hanley Falls was proposed for abandonment, and the Minnesota Valley Regional Railroad Authority purchased the railroad in 1983.
In 1996, the Burlington Northern merged with Atchison, Topeka & Santa Fe to form BNSF Railway, the current operators of the Hanley Falls to Madison segment. In 2002, the Minnesota Prairie Line, Inc (MPL) began operations over the Norwood to Hanley Falls segment. MPL is a subsidiary of the Twin Cities & Western Railroad, and the line continues to see upgrades to spur business development.
Located on the west side of Hanley Falls, this trestle and through girder bridge is the westernmost crossing of the Yellow Medicine River in this town. Little is known about the history of this bridge. It is believed the bridge has been of wooden trestle design since the initial construction, meaning that it was likely updated at semi-regular intervals. In approximately 1930, a through plate girder span was added to the west end of the bridge. The history of this span is unknown, and because the M&StL considered this route a branch line, it is possible that this span was reused from another location. In 1940, new concrete piers would be added at the through girder span, reusing the original span. The most recent alteration to the bridge came in 2020, when three secondhand steel stringer spans were installed over the river channel, giving the bridge its present configuration. Currently, the bridge consists of six timber pile trestle spans, three 38-foot steel stringer spans, ten timber pile trestle spans, a 39-foot through plate girder span and five additional timber pile trestle spans. The bridge is set onto concrete, steel pile and timber pile substructures. The through girder span (span #4) uses an unusual design for the era, with two shallow girders, a floor composed of parallel I-beams and sheet metal deck and square girder ends. In addition, the span runs at a 40-degree skew. The river spans use two different designs, and all three appear to have been fabricated in approximately 1930 for use at unknown locations. Spans #1 and #3 are identical, and use four shallow beams which are heavily riveted. The center span (span #2) uses a design with less riveting but six shallow beams. Unknown contractors fabricated the steel spans, while the Dunnigan Construction Company constructed the substructures. These styles of bridge was exceptionally common along railroads throughout the United States, as it was cheap and easy to construct. Railroads often reused steel spans, as it provided a cost effective way to rebuild a bridge without requiring large amounts of new material. On branch lines or for emergency repairs, many railroads continue to reuse steel spans if feasible. Overall, the bridge appears to be in fair condition, with some deterioration noted. The author has ranked this bridge as being locally significant, due to the common design.
Citations
| Build Date | National Bridge Inventory (NBI) |
| Builder (substructure) | West Central Tribune; February 4, 1941 |
| Railroad History Citation | ICC Valuation Information, Compiled by Richard S. Steele |