1 vote

Windsor Harbor Bridge


West side

Photo taken by James Baughn

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BH Photo #105787


Street View 


Wrought-iron through truss over Rock Creek on Windsor Harbor Road in Kimmswick
Jefferson County, Missouri
Open to pedestrians only
Future prospects
Preserved by the Kimmswick Historical Society
Originally built 1874 by the Keystone Bridge Co. over River Des Peres at Lemay Ferry in St. Louis. Relocated to Kimmswick in 1930; bypassed by new bridge in 1985.
- Keystone Bridge Co. of Pittsburgh, Pennsylvania
Pin-connected, wrought-iron, 9-panel Pratt through truss
Span length: 123.3 ft.
Total length: 123.3 ft.
Deck width: 20.3 ft.
Posted to the National Register of Historic Places on September 8, 1983
Approximate latitude, longitude
+38.36398, -90.36236   (decimal degrees)
38°21'50" N, 90°21'44" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/730447/4249493 (zone/easting/northing)
Quadrangle map:
Inventory numbers
NRHP 83001024 (National Register of Historic Places reference number)
BH 21775 (Bridgehunter.com ID)

Update Log 

  • September 6, 2021: New photos from Patrick Gurwell
  • February 26, 2017: New photos from David Huffman
  • August 17, 2014: New Street View added by Luke
  • July 4, 2011: Updated by Tony Dillon: Tweaked date to 1874 to reflect plaque
  • July 4, 2011: Updated by Luke Harden: Fixed map loaction
  • July 4, 2011: Updated by Robert Elder: Edited Categories - bridge is constructed of Keystone columns, not Phoenix columns.



Windsor Harbor Bridge
Posted May 7, 2017, by Robert Elder (robertelder1 [at] gmail [dot] com)

That is my concern as well. With these bridges you have to look underneath. That is where the problems often show up first. I know that the collapse of the Columbia Bridge was a complete an unpleasant surprise for me. I would hate for the folks of Windsor Harbor to have the same unpleasant surprise. I suspect that both of these bridges are / were subject to a slowly developing problem.

Windsor Harbor Bridge
Posted May 7, 2017, by Tony Dillon (spansaver [at] hotmail [dot] com)

Let's just hope that precarious footing on the substructure doesn't cause problems! At least it seems to be moving slowly.

Windsor Harbor Bridge
Posted May 6, 2017, by Robert Elder (robertelder1 [at] gmail [dot] com)

This bridge is being besieged by backwaters from the Mississippi River.

News article and video which shows the bridge:


Windsor Harbor Bridge
Posted February 27, 2017, by Robert Elder (robertelder1 [at] gmail [dot] com)

In all seriousness though, I was going to ask when James' photographs were taken. They seem to show the bridge in the same position. It truly amazes me how a bridge can sit in a precarious position for so many years, yet other bridges collapse without warning. Ie, the Columbia Bridge in Kansas.

Windsor Harbor Bridge
Posted February 27, 2017, by Robert Elder (robertelder1 [at] gmail [dot] com)

It must have been built by the Cant-ing Bridge Company. Sorry, bad joke...

Windsor Harbor Bridge
Posted February 27, 2017, by James Baughn (webmaster [at] bridgehunter [dot] com)


I'm not overly concerned, as the bridge looks the exact same as it did when I first visited in 2004.

Windsor Harbor Bridge
Posted February 27, 2017, by Nathan Holth (webmaster [at] historicbridges [dot] org)

Is anyone (James?) familiar with this bridge? It is described as "preserved" on this website yet appears to be on the verge of collapse due to failing substructure. Can anyone please clarify the status of this nationally significant bridge?

Windsor Harbor Bridge
Posted February 27, 2017, by ArtS (asuckewer [at] knite [dot] com)

Man, the support structure is scary!

Windsor Harbor Bridge
Posted July 21, 2010, by molly hill (birdgurl97 [at] hotmail [dot] com)

Not much of a bridge geek but this article may help to clarify things, it has some blow apart diagrams and cross sections that look interesting...


Hoping to visit this bridge in person and see for myself what these keystone columns are all about :-)

Windsor Harbor Bridge
Posted March 12, 2010, by Nathan Holth (form3 [at] historicbridges [dot] org)

Some of the design differences in the exact shape of the Keystone columns have to do with the size of the column. Different designs for different sizes. That explains some of the differences between members on WIBC bowstrings as well as Keystone column bridges like Mead Avenue in PA. Two designs:



However, as for this particular bridge it is indeed an unusual variation and I really don't know a lot about it. The little brackets you mention are both functional and decorative and are designed to look like little hands grabbing the parts of the column.

Windsor Harbor Bridge
Posted March 12, 2010, by Robert Elder (robertelder1 [at] gmail [dot] com)

Anthony, I think that you are right. I have spent some time puzzling over this bridge as well. I have interpreted the columns to be Keystone Columns that have not been fully sutured. The components of the column seem to be held together by some type of bracket.

Windsor Harbor Bridge
Posted March 11, 2010, by Nathan Holth (form3 [at] historicbridges [dot] org)


Are you referring to WIBC's "Plate and Channel" bowstrings? Like this one: http://www.historicbridges.org/michigan/bennettpark/index.ph... You would think these would be more common, but I have only seen a small number.

Windsor Harbor Bridge
Posted March 11, 2010, by Anthony Dillon (spansaver [at] hotmail [dot] com)

I have to admit, I am pretty unfamiliar with the Keystone columns. After looking at this bridge, which was built by the Keystone Bridge Company I see the flat sections of the column like the ones on the WIBC bowstrings. Would be interesting to know what made them choose one over the other with each job.

I had read somewhere (wish I could remember where!) that the Wrought Iron Bridge Company supposedly did have another type of "non-tubular" bowstring. Probably the same thing you are speaking of Nathan.