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Meramec River MO 21 Bridge


View from a distance

Photo taken by James Baughn

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BH Photo #107252

Street Views 


Steel through arch bridge over the Meramec River on Tesson Ferry Road (Missouri State Highway 21) at the St. Louis / Jefferson County line
Arnold, St. Louis County, Missouri
Open to four lanes of traffic
Built 1940; rehabilitated 2010
- Massman Construction Co. of Kansas City, Missouri (Contractor)
- Stupp Brothers Bridge & Iron Co. of St. Louis, Missouri (Fabrication)
Cantilevered tied through arch
Length of largest span: 264.0 ft.
Total length: 647.8 ft.
Deck width: 45.9 ft.
Vertical clearance above deck: 14.0 ft.
Eligible for the National Register of Historic Places
Approximate latitude, longitude
+38.46298, -90.41478   (decimal degrees)
38°27'47" N, 90°24'53" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/725558/4260352 (zone/easting/northing)
Quadrangle map:
Land survey
T. 43 N., R. 5 E., Sec. 13
Average daily traffic (as of 2016)
Inventory numbers
MoDOT K-637R (Missouri Dept. of Transportation bridge number)
MONBI 5881 (Missouri bridge number on the National Bridge Inventory)
BH 22650 (Bridgehunter.com ID)
Inspection report (as of June 2017)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Good (7 out of 9)
Sufficiency rating: 50 (out of 100)
View more at BridgeReports.com

Update Log 

  • May 18, 2019: New photos from Joe Sonderman
  • May 24, 2014: New photos from Roger Deschner
  • March 28, 2013: New photo from John Christeson
  • April 14, 2011: New photo from John Christeson
  • July 18, 2010: New Street View added by Kim Harvey
  • July 16, 2010: Updated by Mark Dellbringge: Deck has been replaced and superstructure repainted
  • November 28, 2005: Posted new photos



Meramec River MO 21 Bridge
Posted February 26, 2018, by Chris Jones (milkmanchris [at] hotmail [dot] com)

I found this pic on the MODOT website's archive of highway maps. (1942)


Meramec River MO 21 Bridge
Posted July 16, 2010, by Mark Dellbringge

more photos of portal entrance and driving southbound across the bridge.

Attachment #1 (application/msword; 565,760 bytes)

Attachment #2 (application/msword; 542,208 bytes)

Meramec River MO 21 Bridge
Posted August 16, 2009, by Sharon Spear (sweetsexysharon [at] gmail [dot] com)

The deck of the bridge is currently being replaced. The news release is here.