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Big Creek Road Bridge

Iowa Bridge Number 220880

Big Creek Road Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: July 2, 2009

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Key Facts

Facility Carried / Feature Intersected
Big Creek Road Over Big Creek
Location
Bertram: Linn County, Iowa: United States
Structure Type
Metal 6 Panel Pin-Connected Pratt Through Truss, Fixed and Approach Spans: Wood Stringer (Multi-Beam), Fixed
Construction Date and Builder / Engineer
1893 By Builder/Contractor: J. E. Jayne and Son of Iowa City, Iowa

Technical Facts

Rehabilitation Date
1929
Main Span Length
100 Feet (30 Meters)
Structure Length
118 Feet (36 Meters)
Roadway Width
15.4 Feet (4.69 Meters)
Spans
1 Main Span(s) and 1 Approach Span(s)
NBI Number
220880

Historic Significance Rating (HSR)

Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

The National Bridge Inventory lists a 1929 construction date for this bridge. Given the style of the bridge which includes fishtail style built-up floorbeams, and that the bridge is similar in appearance to the nearby Ely Street Bridge, it seems likely that this bridge was built in the 1890s as well. The 1929 date likely refers to a rehabilitation or relocation of this bridge.

The Big Creek Road Bridge contains a through truss main span that includes six panels. There is also a single wooden stringer approach span. The truss span is traditionally composed. The composition of the truss is as follows: Top chord and end post: back-to-back channels with cover plate and v-lacing. Hip verticals: loop-forged eyebars. Other verticals: back-to-back channels with lattice on each side. Bottom chord: loop-forged eyebars. Portal bracing: paired angles riveted to lattice webbing. Sway bracing: two paired angles riveted together with v-lacing. Lateral bracing: rod. Floor beams: built-up "fishtail" style beams. Railing: Modern Armco guardrails. Deck: wooden deck with asphalt wearing surface. Substructure: Metal caissons (lally columns).

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Photo Galleries and Videos: Big Creek Road Bridge

 
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Bridge Photo-Documentation
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A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer

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Maps and Links: Big Creek Road Bridge

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