Photos
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Overview The bridge acts as a memorial to Fort Dearborn. Photo taken by James McCray in August 2007 |
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Drawbridge Gear Tower The gear tower is a museum. The tower also is a memorial to Old Fort Dearborn, which was located at the south entrance to the bridge. Photo taken by James McCray in February 2008 |
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General View Of Bridge From The Southeast Bank Of The Chicago River Photo taken by Historic American Engineering Record |
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View Of Bridge From Southwest Bank Of The Chicago River Looking North; Equitable Building (Center) And Tribune Tower (Left) Photo taken by Historic American Engineering Record |
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Detail Of Deck Truss, West Side Photo taken by Historic American Engineering Record |
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General View Of Portals Looking North Photo taken by Historic American Engineering Record |
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South Portal Photo taken by Historic American Engineering Record |
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Interior Of Control Room Photo taken by Historic American Engineering Record |
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Detail Of Interior Of Control Room Photo taken by Historic American Engineering Record |
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Bas-Relief Decoration, 'The Discovers', Mural Commemorating Jolliet, Father Marquette, Lasalle And Tonty Photo taken by Historic American Engineering Record |
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Bas-Relief Decoration, 'Defense', Mural Commemorating The Defense Of Fort Dearborn Photo taken by Historic American Engineering Record |
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Bas-Relief Decoration, 'Pioneers' Photo taken by Historic American Engineering Record |
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Bas-Relief Decoration, 'Regeneration,' Mural Commemorating The Rebuilding Of Chicago After The Great Fire Photo taken by Historic American Engineering Record |
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Detail Of Trunnion Girder (Left) And Counterweight (Right), North Span Photo taken by Historic American Engineering Record |
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Detail Of Gears With Trunnion Gear In Background, North Span Photo taken by Historic American Engineering Record |
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General View Of Electric Motors, North Span Photo taken by Historic American Engineering Record |
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Detail Of Electric Motor And Gear Set, North Span Photo taken by Historic American Engineering Record |
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Detail Of Trunnion Girder And Hinges Photo taken by Historic American Engineering Record |
Facts
- Overview
- Bascule bridge over Main Branch Chicago River on Michigan Avenue in Chicago
- Location
- Chicago, Cook County, Illinois
- Status
- Open to traffic
- History
- Built 1920
- Design
- Bascule Pratt deck truss
- Dimensions
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Length of largest span: 255.8 ft.
Total length: 398.8 ft.
Deck width: 64.0 ft.
Vertical clearance above deck: 13.5 ft.
- Recognition
- Posted to the National Register of Historic Places
- Approximate latitude, longitude
- +41.88861, -87.62417 (decimal degrees)
41°53'19" N, 87°37'27" W (degrees°minutes'seconds") - Approximate UTM coordinates
- 16/448217/4637597 (zone/easting/northing)
- USGS topographic map
- Chicago Loop OE E
- Inventory numbers
- IL 016-6035 (Illinois bridge number)
BH 15152 (Bridgehunter.com ID) - Inspection (as of 10/2007)
- Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 71.9 (out of 100) - Average daily traffic (as of 2006)
- 33,300
Sources
- James McCray - jamesinslocomb [at] yahoo [dot] com
- HAER IL-37 - Chicago River Bascule Bridge, Michigan Avenue, Spanning Chicago River at North Michigan Avenue, Chicago, Cook County, IL
- James Baughn - webmaster [at] bridgehunter [dot] com
