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Kost Dam Road Bridge


Photo taken by Matt Lohry in August 2011


BH Photo #210680



Riveted Warren pony truss bridge over Sunrise River on CR 187
Chisago County, Minnesota
Demolished and replaced by a culvert, despite public opposition to the project.
Built 1925
Riveted Warren pony truss
Length of largest span: 58.1 ft.
Total length: 63.7 ft.
Deck width: 17.1 ft.
Also called
Sunrise River Bridge
Approximate latitude, longitude
+45.48032, -92.87495   (decimal degrees)
45°28'49" N, 92°52'30" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/509773/5036317 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 1970)
Inventory numbers
MN 4424 (Minnesota bridge number)
BH 20326 (Bridgehunter.com ID)
Inspection report (as of December 2011)
Overall condition: Poor
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Good (7 out of 9)
Deck condition rating: Very Good (8 out of 9)
Sufficiency rating: 28.2 (out of 100)
View more at BridgeReports.com

Update Log 

  • April 9, 2014: Updated by Nathan Holth: This bridge has been demolished and replaced.
  • August 25, 2011: Updated by Matt Lohry: Updated bridge type
  • September 8, 2010: Updated by Nathan Holth: Updated GPS. This bridge is slated for demolition.


Kost Dam Road Bridge
Posted April 9, 2014, by Matt Lohry

Well, a ConSpan structure isn't any better...just because it's not a slab or stringer doesn't make it any better looking...it's kinda like putting makeup on a warthog...

Kost Dam Road Bridge
Posted April 9, 2014, by Joe Fishbein (jmf [at] visi [dot] com)

When we last inspected the bridge in 2011, we found section loss of almost 32% in some of the lower chords due to pitting and corrosion. The abutments had also moved to the point where the expansion bearings were at their limit of movement and the bridge was tight against them. The bridge was posted at 10 tons due to the chord section loss.

I always hate to see old bridges, especially trusses, demolished, but the county probably figured it was more cost effective to replace it rather than make repairs. At least they didn't install a box culvert or a prestressed beam bridge.

Kost Dam Road Bridge
Posted April 9, 2014, by Anonymous

well, at least the new bridge isn't an ugly slab.

Kost Dam Road Bridge
Posted April 9, 2014, by Nathan Holth (form3 [at] historicbridges [dot] org)

Based on my review of available photos, the truss bridge could have easily and cost-effectively been rehabilitated to correct any structural issues. Certainly didn't warrant demolition and replacement with a ConSpan.

Kost Dam Road Bridge
Posted April 9, 2014, by Joe Fishbein (jmf [at] visi [dot] com)

Bridge 4424 was replaced in 2012 by culvert 13J13. It is always sad to lose an old truss bridge, but this one did have some serious structural issues.

Kost Dam Road Bridge
Posted August 25, 2011, by Matt Lohry

I stopped out here on August 22 to get photos of this bridge, and after visiting this site in person, I can certainly understand why there is an outcry of opposition to replacing this bridge! Not only is the bridge itself beautiful and in relatively decent condition, the road and the surrounding park are equally as beautiful, and a new two-lane highway and replacement bridge would destroy it all. I don't even want to think about what this will look like after this foolishness has taken place.

Kost Dam Road Bridge
Posted September 8, 2010, by Matthew Lohry

MnDOT has shown at least a shred (but not much more than that) of a commitment to historic bridge preservation on a state level by introducing a plan to restore and preserve 24 (! Only!! They still own many more than that that could qualify!!) historic bridges, but when it comes to the county level, most of them in this state (Hennepin and Fillmore counties are the two exceptions) are no better than Pennsylvania or Missouri. It's a very disturbing trend, and Minnesota does not have a whole lot of historic bridges left with which to save face.

Kost Dam Road Bridge
Posted September 8, 2010, by Nathan Holth (form3 [at] historicbridges [dot] org)

This county only has TWO bridges with historic value, and they can't even find a way to preserve one little pony truss bridge? Very disappointing.

Sunrise River Bridge
Posted July 16, 2009, by Dawn Doering (drdoering [at] fieldnotes [dot] biz)

This historic bridge is to be replaced as approved unanimously by the Chisago County Board of Commissioners on July 15, 2009.

Please help stop this.