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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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Map 

Vicinity Map

Vicinity map

Map links:

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 Pony truss
Dimensions
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")
Inventory numbers
IL 016-6035 (Illinois bridge number)
BH 15152 (Bridgehunter.com ID)
Inspection (as of 10/2003)
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: 71.3 (out of 100)
Average daily traffic (as of 2002)
43,700

Categories 

Bascule (436)
Built 1920 (515)
Built during 1920s (4,005)
Chicago, Illinois (78)
Cook County, Illinois (82)
Functionally obsolete (5,033)
Illinois (816)
Movable (859)
NR-listed (1,472)
Open (21,540)
Owned by city (1,847)
Pony truss (9,381)
Span length 250-500 feet (564)
Total length 250-500 feet (2,074)
Truss (15,706)

Update Log 

Sources 

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Comments 

Michigan Avenue Bridge
Posted September 8, 2007, by Tom Staley (thomass [at] nc [dot] rr [dot] com)

Photo taken Sept. 7, 2007

Uploaded file: JPEG image data, EXIF standard 2.2, 2036302 bytes