4 votes

Armstrong Bridge


Photo taken by Mike Roegner

BH Photo #185304


This bridge features a very unique X center panel... A feature that is extremely uncommon in a Warren truss.


Warren through truss bridge over Middle Fork Vermilion River on CR350E Rd south of Armstrong
Vermilion County, Illinois
Open to traffic
Built 1910, rehabilitated in 1970
- Attica Bridge Co. of Attica, Indiana
9-panel, riveted Warren through truss
Length of largest span: 150.2 ft.
Total length: 153.1 ft.
Deck width: 14.7 ft.
Vertical clearance above deck: 16.5 ft.
Eligible for the National Register of Historic Places
Also called
Partlow Bridge
Approximate latitude, longitude
+40.29881, -87.87734   (decimal degrees)
40°17'56" N, 87°52'38" W   (degrees°minutes'seconds")
Approximate UTM coordinates
16/425437/4461291 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 2014)
Inventory numbers
IL 092-0111 (Illinois bridge number)
BH 15703 (Bridgehunter.com ID)
Inspection report (as of February 2017)
Overall condition: Poor
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 21.9 (out of 100)
View more at BridgeReports.com

Update Log 

  • May 5, 2021: New photos from Steve Conro
  • February 18, 2011: New photo from Jacob P. Bernard
  • February 17, 2011: New photo from Jacob P. Bernard
  • July 26, 2010: Updated by Anthony Dillon: Changed truss type to a Warren



Armstrong Bridge
Posted March 27, 2021, by Steve Conro (sconro [at] yahoo [dot] com)

I have it marked on the agenda on an upcoming 4 day trip to this area 04/21. Will have an update.

Armstrong Bridge
Posted July 8, 2020, by Tony Dillon (spansaver [at] hotmail [dot] com)

I had planned on visiting the Armstrong Bridge last Fall when I was in Danville. Unfortunately, due to time constraints, I wasn't able to. I hope they plan to leave this beauty alone.

Armstrong Bridge
Posted July 8, 2020, by Nathan Holth (webmaster [at] historicbridges [dot] org)

It is shame to hear the other bridge is being replaced. I have not visited it, but based on aerial images and NBI data I suspect the smaller bridge is a concrete through girder bridge. I made a page for it in case anyone got any photos before it was demolished. https://bridgehunter.com/il/vermilion/bh89882/

Armstrong Bridge
Posted July 8, 2020, by RDB (bluehavanaross [at] gmail [dot] com)

This bridge is temporarily closed for summer 2020 as the smaller creek bridge south of it is being replaced.

Middle Fork River Bridge
Posted July 26, 2010, by Anthony Dillon (spansaver [at] hotmail [dot] com)

This is a beautiful example of an Attica Bridge Co. span, that looks to be well preserved. I changed the truss type to a Warren, but couldn't tell from the photos if it was riveted or bolted.