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Good Thunder Rail Bridge

Pratt Through Truss Bridge over Maple River
Good Thunder, Blue Earth County, Minnesota

Click the Photo Above to See All Photos of This Bridge!
Name Good Thunder Rail Bridge
Built By Chicago, Milwaukee & St. Paul Railway
Contractor Unknown
Currently Owned By Private Owner
Length 275 Feet Total, 139.5 Foot Main Span
Width 1 Track
Height Above Ground 15 Feet (Estimated)
Superstructure Type Pratt Through Truss and Trestle
Substructure Type Timber Pile
Date Fabricated 1897
Date Relocated Ca. 1930
Relocated From Rock River Bridge #Z-312; Byron, Illinois
Traffic Count 0 Trains/Day (Bridge Has Been Reused)
Current Status In Use By Private Traffic
Milwaukee Road Bridge Number Q-1444
Significance Regional Significance


This large and unique bridge crosses the Maple River just south of Good Thunder, and has been preserved by a very generous landowner!
The bridge here was built in approximately 1930, to replace an 1882 truss which was relocated from the first bridge at Byron, Illinois in approximately 1905.
This span is believed to have been part of the second Byron Bridge, which existed from 1897 until 1929. Because of the large skew of that span, the Milwaukee Road reused older spans across the system to replace other skewed wooden bridges.
Despite its abandoned state, the bridge is well maintained for hunting and walking by the landowner. The landowner had mentioned interest of rehabilitating and restoring the bridge. For a unique and beautiful structure, this is absolutely worth it!

In a technical sense, the bridge is also an uncommon design. The bridge contains a 45 degree skew, and an 8-Panel Pratt Through Truss with pinned connections. This truss contains a single vertical endpost on each end, adding to the unique design. It appears that one panel was removed, giving a total span length of 139 feet 6 inches.
The approaches are constructed of wood, as are the piers. Overall, it appears to be in very good condition for the age.

Historic Photo
Byron, Illinois bridge; This bridge was one of the five spans shown. Note the vertical endpost of the three middle spans.

The author has ranked this bridge regionally significant on a number of factors. The bridge retains an excellent and exceptional level of historic integrity. Preservation of this structure also adds to the significance, as well as the unique design.

The photo above is an overview. This structure was accessed with permission.

Citations

Source Type

Source

Build Date Milwaukee Road Archives at the Milwaukee Central Library
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele