Historic Bridges of the U.S.

Photos

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Oblique View

Photo taken by J.R. Manning in June 2006

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North Approach

Photo taken by J.R. Manning in June 2006

Vicinity map

Map links:

Overview: Steel through arch bridge over St. Louis Bay on I-535/US 53 between Duluth and Superior
Status: Open to traffic
History: Built 1961; rehabilitated 1994
Design: Steel through arch
Dimensions: Length of largest span: 600.1 ft.
Total length: 1,140.1 ft.
Deck width: 58.1 ft.
Vertical clearance above deck: 19.3 ft.
Also called: John A. Blatnik Bridge (official name)
High Bridge (original name)
Approximate latitude, longitude: +46.74667, -92.09917 (decimal degrees)
46°44'48" N, 92°05'57" W (degrees°minutes'seconds")
Approximate UTM coordinates: 15/568809/5177406 (zone/easting/northing)
USGS topographic map: Superior
Inventory number: BH 34744 (Bridgehunter.com ID)
Inspection (as of 08/2005): Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 75.0 (out of 100)
Average daily traffic (as of 2004): 37,700