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BNSF Seven Mile Creek Viaduct

Deck Plate Girder Viaduct over Seven Mile Creek
Murray, Clarke County, Iowa

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Name BNSF Seven Mile Creek Viaduct
Built By Chicago, Burlington & Quincy Railroad
Contractor American Bridge Company, Lassig Branch of Chicago
Currently Owned By BNSF Railway
Length 361 Feet Total, 75 Foot Main Spans
Width 2 Tracks
Height Above Ground 50 Feet (Estimated)
Superstructure Type Deck Plate Girder and I-Beam
Substructure Type Concrete, Steel Pile and Timber Pile
Date Built 1900
Traffic Count 50 Trains/Day (Estimated)
Current Status In Use
BNSF Bridge Number 372.75
Significance Local Significance
Documentation Date November 2016


Located near Murray, this large steel viaduct crosses Seven Mile Creek.
Built in 1900, the bridge consists of seven deck girder spans, approached by a single I-Beam span on the west end. The bridge rests on concrete, wood and steel substructures.
Oftentimes, large viaducts like this were built to cross deep valleys, as it was oftentimes more cost effective than filling the valley in and creating an arch.
It appears this bridge had modifications on the west end. The eastern two deck girder spans and the I-Beam span appear to have been added in the early 1960s, as they use newer steel pile and timber pile piers.
Overall, the bridge appears to be in good condition, with little visible deterioration.

Historic Photo
Historic photo of the bridge

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 American Bridge Company plaque
Contractor American Bridge Company plaque
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele