Photos
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Overview Photo taken by James Baughn |
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Oblique view Photo taken by James Baughn |
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Underneath Photo taken by James Baughn |
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West portal Photo taken by James Baughn |
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Crossing eastbound Photo taken by James Baughn |
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East portal Photo taken by James Baughn |
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Crossing westbound Photo taken by James Baughn |
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eastbound approach approaching the bridges on the eastbound lanes Photo taken by Kim Harvey in July 2008 |
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Photo taken by J.P. in December 0000 |
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Photo taken by J.P. in December 0000 |
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Photo taken by J.P. in December 0000 |
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Photo taken by J.P. in December 0000 |
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Photo taken by J.P. in December 0000 |
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
- Pair of cantilevered Warren through trusses
- Dimensions
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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
- +38.76560, -90.13513 (decimal degrees)
38°45'56" N, 90°08'06" W (degrees°minutes'seconds") - Approximate UTM coordinates
- 15/748912/4294664 (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