1 vote

St. Clair River Bridge



Photo taken by Clayton B. Fraser, November 1994, for HAER

View photos at Library of Congress

BH Photo #120554


Street Views 


Through truss bridge over St. Clair River on Westbound I-94 in Port Huron
Port Huron, St. Clair County, Michigan
Open to traffic
Built 1938; rehabilitated 1999
- American Bridge Co. of New York
- Modjeski & Masters of Mechanicsburg, Pennsylvania
- Paul Philippe Cret
- Ralph Modjeski of Bochnia, Poland (Design)
- Sarnia Bridge Co. of Sarnia, Ontario, Canada
- Wisconsin Bridge & Iron Co. of Milwaukee, Wisconsin
"When it opened in October 1938, the Blue Water Bridge symbolized the peaceful relationship between the United States and Canada, a sharp contrast to the hostilities in Europe which were about to erupt into World War II. Forming an efficient link between the Midwest and the East Coast, the bridge had become one of the most heavily-travelled border crossings between the two nations. Modjeski and Masters, an internationally renowned engineering firm based in Harrisburg, Pennsylvania, designed and supervised construction of the bridge. Although the arch cantilever through truss did not present any unusual engineering challenges, use of the lower chord as part of the deck system was a creative response to aesthetic and budgetary concerns."
--Charlene K. Roise, Hess, Roise & Co., Minneapolis
for Michigan DOT and Historic American Engineering Record
March, 1995
Length of largest span: 871.1 ft.
Total length: 6,178.8 ft. (1.2 mi.)
Deck width: 34.8 ft.
Vertical clearance above deck: 17.1 ft.
Posted to the National Register of Historic Places on August 29, 1980
Also called
Blue Water Bridge
Approximate latitude, longitude
+42.99917, -82.42500   (decimal degrees)
42°59'57" N, 82°25'30" W   (degrees°minutes'seconds")
Approximate UTM coordinates
17/383848/4761707 (zone/easting/northing)
Quadrangle map:
Port Huron
Inventory numbers
NRHP 80004841 (National Register of Historic Places reference number)
MINBI 77177111000B044 (Michigan bridge number on the National Bridge Inventory 2010 and before)
MINEW 09988 (Michigan bridge number on the National Bridge Inventory 2011 and later)
BH 20237 (Bridgehunter.com ID)
Inspection (as of 12/2008)
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: 70.0 (out of 100)
Average daily traffic (as of 2007)

Update Log 

  • July 27, 2016: New photos from Royce and Bobette Haley
  • February 4, 2015: Photo imported by Dave King
  • October 11, 2012: New photo from Jann Mayer
  • April 13, 2010: New Street View added by Nathan Holth
  • August 11, 2008: Updated by J.R. Manning
  • August 10, 2008: Updated by J.R. Manning


  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
  • HAER MI-16-A - Blue Water Bridge, Spanning St. Clair River at I-69, I-94, & Canadian Route 402, Port Huron, St. Clair County, MI
  • Michigan DOT Historic Bridges - Blue Water Bridge page of the MDOT Historical Bridges listings
  • Nathan Holth
  • Historicbridges.org - by Nathan Holth
  • Jann Mayer - jannmayer [at] gmail [dot] com
  • Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com