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Avoca Rail Bridge

Quadrangular Through Truss Bridge over W. Nishnabotna River
Avoca, Pottawattamie County, Iowa

Click the Photo Above to See All Photos of This Bridge!
Name Avoca Rail Bridge
Built By Chicago, Rock Island & Pacific Railroad
Contractor Unknown
Currently Owned By Private Owner
Length 252 Feet Total, 110 Foot Main Span
Width 1 Track
Height Above Ground 10 Feet (Estimated)
Superstructure Type Quadrangular Through Truss and Trestle
Substructure Type Timber Pile
Date Fabricated Ca. 1885
Date Erected Ca. 1910
Original Location Unknown
Traffic Count 0 Trains/Day (Bridge is a Private Road)
Current Status In Use as Private Road
RI Bridge Number 23
Significance Regional Significance
Documentation Date October 2015


This beautiful through truss bridge crosses the W. Nishnabotna River south of Avoca.
The bridge sits on private land. After the rails were removed, a local farmer purchased the spans to access his fields.
Currently, bridge is comprised of a single Quadrangular Through Truss span with riveted connections. This span features a very lightweight construction, with typical portals seen on Lassig Bridge & Iron Works structures. In addition, the structure is approached by wooden trestle on either side and sits on timber pile substructures.
Unfortunately, the history of the bridge is largely unknown. It appears this span dates to approximately 1885, as it is lighter than a typical 1890s truss of this design. It is also likely that it was moved from another location, possibly after a replacement or double tracking project.
Regardless, this bridge appears to be in good condition.

The author has ranked this bridge as being regionally significant, due to the old design of the truss. This bridge should be preserved at all costs.
The photo above is looking north across the bridge. It was accessed by asking permission from the owner at the end of Sycamore Road.

A special thank you is in order to the owner, who allowed me to access this bridge!

Citations

Source Type

Source

Build Date Estimated
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele