2 votes

Bolson Bridge


Photo taken by Robert Elder


BH Photo #110346


Through truss bridge over Upper Iowa River on 143rd Avenue
Winneshiek County, Iowa
Open to traffic
Built 1924; Rehabilitated 1974
Riveted, 8-panel Parker through truss
Length of largest span: 114.2 ft.
Total length: 196.2 ft.
Deck width: 17.1 ft.
Vertical clearance above deck: 10.0 ft.
Approximate latitude, longitude
+43.31831, -91.67320   (decimal degrees)
43°19'06" N, 91°40'24" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/607585/4797018 (zone/easting/northing)
Quadrangle map:
Land survey
T. 99 N., R. 7 W., Sec. 36
Average daily traffic (as of 2017)
Inventory numbers
IA 348430 (Iowa bridge number)
BH 14766 (Bridgehunter.com ID)
Inspection report (as of March 2017)
Overall condition: Poor
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Poor (4 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 30.2 (out of 100)
View more at BridgeReports.com

Update Log 

  • March 14, 2017: Updated by Luke: Added build date
  • September 14, 2014: Updated by Tony Dillon: Added common name
  • May 13, 2013: Updated by Jason Smith: Readjusted the GPS coordinates and location of the bridge to reflect its existence
  • October 11, 2012: Updated by Jason Smith: Added categories "Riveted", "A-frame portal"
  • February 6, 2008: New photos from Jason Smith
  • February 4, 2008: New photos from Jason Smith


  • Robert Elder - robertelder1 [at] gmail [dot] com
  • Jason Smith - flensburg [dot] bridgehunter [dot] av [at] googlemail [dot] com
  • Tony Dillon - spansaver [at] hotmail [dot] com
  • Historicbridges.org - by Nathan Holth
  • Luke


Bolson Bridge
Posted March 14, 2017, by Luke

1924 per our own Jason Smith's website: http://thebridgehunter.areavoices.com/2014/04/26/mystery-bri...

Bolson Bridge
Posted March 14, 2017, by Robert Elder (robertelder1 [at] gmail [dot] com)

Without checking county records (which may, or may not have the answer), I would estimate that this bridge could have been built ca. 1915-1930 based on overall appearance.

Bolson Bridge
Posted March 14, 2017, by randy haugen (ranhau9 [at] aol [dot] com)

How old is this bridge? When was it built?

Bolson Bridge
Posted September 15, 2014, by Don Morrison

Agreed, Nathan.

I was asking because there was an update - Tony added the common name recently, and I was curious what was changed. Saw Lundy Bridge in the alternate names and thought Lundy Bridge was downstream of this bridge.

Tony must have changed it from 143rd Ave Bridge.

Someone has removed Lundy bridge from the alternate names now, so all is well.

Bolson Bridge
Posted September 15, 2014, by Nathan Holth (webmaster [at] historicbridges [dot] org)

As far as I know this isn't Lundy Bridge, this is: http://www.historicbridges.org/bridges/browser/?bridgebrowse...

Bolson Bridge
Posted September 14, 2014, by Don Morrison

Is Lundy Bridge not the bridge on Lundy Bridge Road, Northeast of this bridge at 43.347951, -91.620283?

I see it listed as an alternate name for this bridge.