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L Avenue Bridge

Photos 

Oblique view

From the northeast.

Photo taken by J.R. Manning

BH Photo #109481

Map 

Description 

Bridge is likely a relocated Chicago & North Western Railway pony truss, converted for road use. Details underneath this seem to indicate this.

Facts 

Overview
Pony truss bridge over Union Pacific Railroad on L Avenue
Location
Boone County, Iowa
Status
Open to traffic
History
Built 1900
Railroads
- Chicago & North Western Railway (CNW)
- Union Pacific Railroad (UP)
Design
Riveted double-intersection Warren pony truss
Dimensions
Length of largest span: 46.9 ft.
Total length: 129.9 ft.
Deck width: 17.7 ft.
Approximate latitude, longitude
+42.06127, -93.95077   (decimal degrees)
42°03'41" N, 93°57'03" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/421334/4657016 (zone/easting/northing)
Quadrangle map:
Boone West
Land survey
T. 84 N., R. 27 W., Sec. 26
Inventory numbers
IA 77840 (Iowa bridge number)
BH 12907 (Bridgehunter.com ID)
Inspection (as of 05/2010)
Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Serious (3 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 25.7 (out of 100)
Average daily traffic (as of 2003)
25

Update Log 

  • October 11, 2016: New photos from John Marvig
  • February 19, 2010: Updated by J.R. Manning: Updated Location
  • March 29, 2008: New photo from J.R. Manning

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Sources