Historic Bridges of the U.S.

Photos

Overview

These first two photos were taken Oct. 1988 by John P. Herr for the Historic American Engineering Record while documenting the Alton Lock and Dam

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One span

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Historic postcard

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Summer 1993

Pictures of 2 of the spans and part of the deck truss approach span.

Photo taken by U.S. Department of the Interior

Vicinity map

Map links:

Overview: Lost seven-span through truss bridge over the Mississippi River on US 67 at Alton
Status: Replaced by the Clark Bridge
History: Built 1928; closed for major repairs in 1959 and 1975; permanently closed January 4, 1994; first span imploded August 11, 1994, other 6 spans imploded August-October 1994
Builder: - Alton-St. Louis Bridge Co
Design: Pennsylvania through truss
Dimensions: Length of largest span: 444.9 ft.
Total length: 3,553.3 ft.
Deck width: 20.0 ft.
Vertical clearance above deck: 14.6 ft.
Also called: Clark Bridge (official name)
Approximate latitude, longitude: +38.88325, -90.18229 (decimal degrees)
38°52'60" N, 90°10'56" W (degrees°minutes'seconds")
Approximate UTM coordinates: 15/744411/4307594 (zone/easting/northing)
Inventory numbers: MoDOT K-984R1 (Missouri Dept. of Transportation bridge number)
BH 15487 (Bridgehunter.com ID)
Inspection (as of 10/1991): Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 16.3 (out of 100)
Average daily traffic (as of 1989): 18,769