Photos 

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Overview

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Oblique view

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Underneath

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West portal

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Crossing eastbound

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East portal

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Crossing westbound

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eastbound approach

approaching the bridges on the eastbound lanes

Photo taken by Kim Harvey in July 2008

Map 

Vicinity Map

Vicinity map

Map links:

Facts 

Overview
Pair of cantilevered through truss bridges over Chain of Rocks Canal on I-270 in Granite City
Location
Madison County, Illinois
Status
Open to traffic
History
Built ca. 1963; IDOT has plans for bridge replacement in next 5 years
Design
Cantilevered through truss
Dimensions
Length of largest span: 479.9 ft.
Total length: 1,989.6 ft.
Deck width: 29.8 ft.
Vertical clearance above deck: 17.1 ft.
Approximate latitude, longitude
+38.76627, -90.13483   (decimal degrees)
38°45'59" N, 90°08'05" W   (degrees°minutes'seconds")
Inventory numbers
IL 060-0036 (Illinois bridge number)
BH 15498 (Bridgehunter.com ID)
Inspection
Average daily traffic (as of 2006)
75

Categories 

Built during 1960s (692)
Cantilevered truss (118)
Doomed (78)
Functionally obsolete (5,079)
I-270 (MO-IL) (3)
Illinois (877)
Madison County, Illinois (32)
Mississippi River (87)
Open (21,696)
Owned by state (6,584)
Span length 250-500 feet (582)
Through truss (5,330)
Total length 1000-2500 feet (708)
Truss (15,918)

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