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B Avenue Overpass

Photos 

The west face

This bridge is a typical pony truss built by the Chicago & Northwestern Railway in Iowa in the early part of the 20th Century. (The C&NW was absorbed by the Union Pacific in 1995.)

Photo taken by J.R. Manning in July 2007

BH Photo #109897

Map 

Facts 

Overview
Pony truss bridge over UPRR on B Avenue
Location
Tama County, Iowa
Status
Open to traffic
History
Built ca. 1920
Design
Riveted double-intersection Warren pony truss
Dimensions
Length of largest span: 79.1 ft.
Total length: 136.2 ft.
Deck width: 18.0 ft.
Approximate latitude, longitude
+41.99101, -92.74626   (decimal degrees)
41°59'28" N, 92°44'47" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/521017/4648808 (zone/easting/northing)
Quadrangle map:
Montour
Land survey
T. 83 N., R. 16 W., Sec. 20
Inventory numbers
IA 318380 (Iowa bridge number)
BH 14492 (Bridgehunter.com ID)
Inspection (as of 09/2010)
Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Serious (3 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 31.0 (out of 100)
Average daily traffic (as of 2009)
25

Update Log 

  • January 26, 2008: New photo from J.R. Manning

Sources 

  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net