Yates Avenue Overpass

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

Click the Photo Above to See All Photos of This Bridge!
Name Yates Avenue Overpass
Built By Chicago & North Western Railway
Contractor Unknown
Currently Owned By Marshall County
Length 162 Feet Total, 75 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
Date Built Ca. 1885, Rebuilt 1900
Original Location Unknown
Traffic Count 0 Trains/Day (Bridge is a Road)
Current Status Open to Road Traffic
UP Bridge Number 145.41
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 in 1900, the bridge has served traffic crossing Yates Avenue for quite some time. The bridge features a pretty basic double intersection Warren Pony Truss, which has been converted to road use.
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.
One of these improvements was the construction of outriggers, to strengthen the deck. As a result, while the existing truss was built in Phoenixville, Pennsylvania; the improvements were made using Illinois Steel Company steel.
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.

The author has ranked the bridge as being moderately significant, due to the unique design and interesting history.
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
Erection Date Chicago & North Western Railway Historical Society
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele

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