Photos 

< Previous   (1 of 8)   Next >

Overview

< Previous   (2 of 8)   Next >

Oblique view

< Previous   (3 of 8)   Next >

Underneath

< Previous   (4 of 8)   Next >

West portal

< Previous   (5 of 8)   Next >

Crossing eastbound

< Previous   (6 of 8)   Next >

East portal

< Previous   (7 of 8)   Next >

Crossing westbound

< Previous   (8 of 8)   Next >

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
Future prospects
Slated for replacement in the next 5 to 10 years
History
Built ca. 1963
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")
Approximate UTM coordinates
15/748936/4294739 (zone/easting/northing)
USGS topographic map
Columbia Bottom
Inventory numbers
IL 060-0036 (Illinois bridge number)
BH 15498 (Bridgehunter.com ID)
Inspection (as of 09/2006)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 47.0 (out of 100)
Average daily traffic (as of 2007)
27,350

Categories 

Built during 1960s (763)
Cantilevered truss (128)
Doomed (81)
Functionally obsolete (5,747)
I-270 (MO-IL) (3)
Illinois (937)
Madison County, Illinois (42)
Mississippi River (88)
Navigable waterway (1,260)
Open (21,982)
Owned by state (6,720)
Span length 250-500 feet (592)
Through truss (5,487)
Total length 1000-2500 feet (720)
Truss (16,168)

Update Log 

Sources 

Comments 

Post a comment here · Contact webmaster