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RI Bridge #27.7

Steel Stringer Bridge over Unnamed Branch of Hinkle Creek
Garrison, Benton County, Iowa

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Name RI Bridge #27.7
Built By Chicago, Rock Island & Pacific Railroad
Contractor Unknown
Currently Owned By Benton County Conservation
Length 50 Feet Total, 25 Foot Spans
Width 1 Track
Height Above Ground 15 Feet (Estimated)
Superstructure Type Steel Stringer
Substructure Type Stone Masonry and Concrete
Date Built Ca. 1940
Traffic Count 0 Trains/Day (Bridge is a Trail)
Current Status Rails to Trails
RI Bridge Number 27.7
Significance Local Significance
Documentation Date December 2019


Located east of Garrison, near 60th Street Drive, this steel stringer bridge crosses a small tributary of Hinkle Creek.
Little is known about the history of this bridge, although it appears to date to around 1940. The bridge consists of a pair of steel stringer spans, set onto substructures made of stone and concrete. The west abutment is constructed of concrete, which appears to encase stone; while the east is made of unaltered stone. The pier is concrete, but may have also encased stone.
Simply built, it is like many others on railroads all around America. It seems likely that this bridge replaced a girder or pony truss.
Overall, the bridge appears to be in excellent condition, with no major deterioration. In addition, preventative measures such as adding sheet pile to scour areas should lengthen the life of this bridge. It continues to serve as part of the Old Creamery Trail.

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

Citations

Source Type

Source

Build Date Based on nearby bridge
Contractor Based on nearby bridge
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele