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Southwest Avenue Bridge

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Photos 

Remaining balustrade

Photo taken by James Baughn in November 2008

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Facts 

Overview
Concrete stringer bridge over the Union Pacific Railroad on Southwest Avenue (at Marconi Avenue) in St. Louis
Location
St. Louis, Missouri
Status
Open to traffic with a 20-ton weight limit
History
Built in 1920; southward extension added in 1961
Railroad
- Union Pacific Railroad (UP)
Design
Stringer
Dimensions
Length of largest span: 34.1 ft.
Total length: 123.0 ft.
Deck width: 60.0 ft.
Approximate latitude, longitude
+38.61116, -90.27351   (decimal degrees)
38°36'40" N, 90°16'25" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/737398/4277154 (zone/easting/northing)
Quadrangle map:
Webster Groves
Inventory numbers
MONBI 12883 (Missouri bridge number on the National Bridge Inventory)
BH 38038 (Bridgehunter.com ID)
Inspection (as of 04/2015)
Deck condition rating: Serious (3 out of 9)
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Poor (4 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 2.0 (out of 100)
Average daily traffic (as of 2014)
10,460

Update Log 

  • June 9, 2011: Updated by Mark Dellbringge: New pictures provide proof the 1920 bridge still exists; just an extension was added
  • November 13, 2008: New photos from James Baughn
  • November 8, 2008: Added by James Baughn

Sources 

  • James Baughn - webmaster [at] bridgehunter [dot] com
  • Mark Dellbringge

Comments 

Southwest Avenue Bridge
Posted August 13, 2010, by Mark Dellbringge

As of 8/12/2010 the Southwest Avenue Bridge over the UPRR has a weight limit of 20 tons, and the right lane eastbound is closed.