6 votes

John A. Blatnik Bridge


Oblique View

Photo taken by J.R. Manning in June 2006

BH Photo #112544

Street View 


Steel through arch bridge over St. Louis Bay on I-535/US 53 between Duluth and Superior
Duluth, Douglas County, Wisconsin, and St. Louis County, Minnesota
Open to traffic
Future prospects
Slated for demolition and replacement in 2028.
Built 1961; rehabilitated 1994
Steel through arch
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
High Bridge (original name)
Approximate latitude, longitude
+46.74924, -92.10096   (decimal degrees)
46°44'57" N, 92°06'03" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/568668/5177691 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 2015)
Inventory number
BH 34744 (Bridgehunter.com ID)
Inspection report (as of July 2017)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 66 (out of 100)
View more at BridgeReports.com

Update Log 

  • May 27, 2021: New photos from Josh Schmid
  • September 27, 2020: New photo from Ed Hollowell
  • August 4, 2020: New photos from Jason Smith
  • April 11, 2020: Updated by Nick Boppel: Fix name & map marker
  • October 16, 2019: New photos from Ben Tate
  • March 18, 2019: Updated by Nathan Holth: This bridge is now doomed.
  • January 28, 2015: New photo from Luke
  • October 9, 2014: New photos from Max Koehn
  • March 19, 2011: New photos from Matthew Lohry
  • August 2, 2010: New Street View added by Jason Smith
  • June 5, 2008: Changed name
  • February 27, 2008: Updated by J.R. Manning: Added Minnesota Information

Related Bridges 


  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
  • James Baughn - webmaster [at] bridgehunter [dot] com
  • Jason Smith - flensburg [dot] bridgehunter [dot] av [at] googlemail [dot] com
  • Matt Lohry
  • Max Koehn - mkoehn45 [at] gmail [dot] com
  • Luke
  • Nathan Holth
  • Ben Tate - benji5221 [at] yahoo [dot] com
  • Nick Boppel - nickboppel01 [at] gmail [dot] com
  • Blatnik Bridge (John A. Blatnik Bridge, High Bridge) - HistoricBridges.org
  • Ed Hollowell - erhollowell [at] aol [dot] com
  • Josh Schmid


Blatnik Bridge
Posted March 18, 2019, by Nathan Holth (webmaster [at] historicbridges [dot] org)
Blatnik Bridge
Posted August 9, 2017, by Joe Fishbein (jmfmando [at] gmail [dot] com)

Preliminary studies are under way for the eventual replacement of this bridge. A likely scenario involves keeping the girder approach spans and replacing the main truss span. No design concepts have been proposed yet. A detailed inspection and load rating of the approach spans is just getting started. Any replacement project will be at least 10 years down the road, but be forewarned!

Blatnik Bridge
Posted May 12, 2014, by Joe Fishbein (jmf [at] visi [dot] com)

The Blatnik Bridge underwent a major rehab project in 2012-2013, which included reinforcement of some gusset plates, new strip-seal and modular deck joints, repainting of the truss and approach spans and a new decorative lighting system. Repairs enabled the 40-ton load limit to be removed; the bridge is no longer posted.

Blatnik Bridge
Posted February 10, 2013, by Cap't Tom Mackay (Ret.) (oriskany65 [at] msn [dot] com)

The view to the right from the Blatnik Bridge is of Superior Bay.

Blatnik Bridge
Posted December 18, 2011, by Clark Vance (cvance [at] dogmail [dot] com)

See the related bridge just added.

Blatnik Bridge
Posted December 18, 2011, by Atmo

I find it a bit interesting that while a page exists for the Blatnik Bridge here, there's still nothing on the Bong Bridge just a bit farther south.