Webster Street Overpass

Recycled Pony Truss Bridge over Union Pacific Railroad
LeGrand, Marshall County, Iowa

Click the Photo Above to See All Photos of This Bridge!
Name Webster Street Overpass
Built By Chicago & North Western Railway
Contractor Unknown
Currently Owned By Marshall County
Length 125 Feet Total, 80 Foot Main Span
Width 1 Track, 1 Road Lane
Height Above Ground 20 Feet (Estimated)
Superstructure Type Double Intersection Warren Pony Truss and Trestle
Substructure Type Timber Pile and Concrete
Date Built Ca. 1885, Rebuilt Ca. 1930
Original Location Unknown
Traffic Count 0 Trains/Day (Bridge is a Road)
Current Status Closed to All Traffic
CNW Bridge Number 429
Significance Moderate Significance
Documentation Date October 2016
A brief history of the Chicago & North Western Iowa Division mainline, now part of the Overland Route:


Along the former Chicago & North Western mainlines, there are numerous road bridges utilizing former railroad bridge parts. This structure is no different.
Built sometime after 1918, the bridge has served traffic on Webster Street for quite some time. The bridge features a pretty basic double intersection Warren Pony Truss, which has been converted to road use. Unlike many of the similar trusses, this bridge has laced members.
From a basic inspection, one can assume that the bridge was extensively rebuilt for road use. Improvements likely included the removal of the original railroad deck and many structural steel components. Empty rivet holes and hacked off members can be seen.
One of these improvements was the construction of outriggers, to strengthen the deck. In addition, blocks with bolts through it, which can be described as tension blocks, hold the truss lines to a rebuilt floor. The floor is built out of metal floor beams and wooden stringers. None of this floor is original to the truss.
As for the original location and build date of the bridge, it is likely that the truss dates to the 1880s. However, the original location of the bridge has not yet been determined.
It is possible that it could have originally been located somewhere close by, such as a crossing of Linn Creek. However, other similar crossings have shown that the spans could have come from anywhere.
The bridge overall contains the truss, which features riveted connections. In addition, the bridge is approached by trestle spans and rests on wooden piers, which sit on concrete blocks.

The author has ranked the bridge as being moderately significant, due to the unique design and interesting history. The road has been closed for quite some time, since at least 2014, due to deterioration throughout the timber components of the bridge.
The photo above is an overview. The bridge can be accessed from the road which it carries.


Source Type


Fabrication Date Estimated based on similar bridges
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele

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