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BNSF Mosquito Creek Bridge #7

Warren Pony Truss Bridge over Mosquito Creek
Neola, Pottawattamie County, Iowa

Click the Photo Above to See All Photos of This Bridge!
Name BNSF Mosquito Creek Bridge #7
Built By Chicago, Milwaukee, St. Paul & Pacific Railway
Contractor Unknown
Currently Owned By BNSF Railway
Length 243 Feet Total, 123 Foot Main Span
Width 1 Track
Height Above Ground 15 Feet (Estimated)
Superstructure Type Warren Pony Truss and Through Plate Girder
Substructure Type Concrete
Date Built 1911 and 1932
Traffic Count 2 Trains/Day (Estimated)
Current Status In Use
MILW Bridge Number Z-1534
Significance Moderate Significance
Documentation Date September 2016


Located south of Neola, this large pony truss is the 7th crossing of Mosquito Creek.
Built in 1932, this bridge replaced an older pony truss bridge, which was reused across the Big Sioux River. Currently, the bridge consists of a single 8-panel riveted Warren Pony Truss. This span is approached by a pair of through girders on the west end, which date to 1911. The bridge rests on concrete substructures.
It appears that the early 1930s were a time of rebuilding along this route, and many bridges were replaced. This truss was a common design to replace smaller through trusses between 1927 and 1931.
Overall, the bridge appears to be in good condition, with little noted deterioration.

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

Mosquito Creek Railroad Bridges
Upstream BNSF Mosquito Creek Bridge #6
Downstream BNSF Mosquito Creek Bridge #8

Citations

Source Type

Source

Build Date Milwaukee Road Archives at the Milwaukee Central Library
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele