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UP IA-9 Bridge

Deck Plate Girder Bridge over Iowa Highway 9
Armstrong, Emmet County, Iowa

Click the Photo Above to See All Photos of This Bridge!
Name UP IA-9 Bridge
Built By Chicago, Rock Island & Pacific Railroad
Contractor Unknown
Currently Owned By Union Pacific Railroad
Length 91 Feet Total, 33 Foot Main Span
Width 1 Track
Height Above Ground 14 Feet 0 Inches
Superstructure Type Steel Girder with Trestle Approaches
Substructure Type Timber Pile
Date Built 1931
Traffic Count 0 Trains/Day (Estimated)
Current Status Rarely Used
UP Bridge Number 40.77
Significance Local Significance
Documentation Date December 2014
In 1898 the Chicago, Rock Island and Pacific Railroad built an additional line from Estherville, IA at the junction of an additional line to Armstrong, IA.

This line also met up with an additional line, built 1892 that went to Lakota, IA.

In 1900, the line was extended further, going to Bricelyn, Minnesota. Here it met up with a Chicago Northwestern line that was built the year before. The CNW line went to Mason City, Iowa and Fairmont, Minnesota.

Rock Island had possetion of this line for a long time. It was finally cut in 1980, when the Rock Island was having bad financial trouble. The Chicago Northwestern came into possession of this line, along with several others in Iowa and Minnesota.

The Chicago Northwestern worked hard to fix up some of the infrastructure, including a bridge over the East Fork of the Des Moines River near Armstrong, where they replaced over half the bridge. There were also many other projects.

The Chicago Northwestern Railway was purchased by Union Pacific in 1995. The Union Pacific continues to operate this line with hardly any trains. Maybe one every couple weeks.
06/26/21


Located west of Armstrong, this small girder bridge crosses Iowa Highway 9.
Built in 1931, the bridge consists of a single twinned deck girder span, approached by trestle. The entire bridge sits on timber substructures.
Twinning deck girders was common for both short spans, as well as rebuilding spans. It is possible that this girder is actually older, although because of poor Rock Island record keeping, further information cannot be found.
Overall, the bridge appears to be in fair condition. It appears that the timber components of this bridge have not been upgraded in some time.

The author has ranked this bridge as being locally significant, due to the common design.
The photo above is an overview.

Citations

Source Type

Source

Build Date 1992 National Bridge Inventory
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele



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