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South Portal Of Bridge Looking East

Photo taken by Historic American Engineering Record

Overview: Bascule bridge over Main Branch Chicago River on Franklin Street in Chicago
Location: Chicago, Cook County, Illinois
Status: Open to traffic
History: Built 1920; rehabilitated 2002
Builders: - Great Lakes Dredge & Dock Co.
- Ketler & Elliot Co.
Design: Bascule Pratt pony truss
Dimensions: Length of largest span: 252.0 ft.
Total length: 319.9 ft.
Deck width: 38.1 ft.
Approximate latitude, longitude: +41.88750, -87.63583 (decimal degrees)
41°53'15" N, 87°38'09" W (degrees°minutes'seconds")
Approximate UTM coordinates: 16/447249/4637481 (zone/easting/northing)
USGS topographic map: Chicago Loop
Inventory numbers: IL 016-6020 (Illinois bridge number)
BH 15151 (Bridgehunter.com ID)
Inspection (as of 12/2010): Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Good (7 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 76.0 (out of 100)
Average daily traffic (as of 2010): 15,800

HAER IL-65 - Chicago River Bascule Bridge, Franklin Street, Spanning Chicago River at North Franklin Street, Chicago, Cook County, IL
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