2 votes

Lacon Bridge



Photo taken by Bill Burmaster

BH Photo #102362


Street Views 


Continuous through truss bridge over the Illinois River on IL 17 at Lacon
Lacon, Marshall County, Illinois
Open to two-lane traffic
Built 1939; rehabilitated 1990
Continuous Through Truss
Length of largest span: 377.8 ft.
Total length: 1,572.7 ft.
Deck width: 26.2 ft.
Vertical clearance above deck: 16.3 ft.
Approximate latitude, longitude
+41.02639, -89.42056   (decimal degrees)
41°01'35" N, 89°25'14" W   (degrees°minutes'seconds")
Approximate UTM coordinates
16/296500/4544509 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 2017)
Inventory numbers
IL 062-0003 (Illinois bridge number)
BH 15513 (Bridgehunter.com ID)
Inspection report (as of April 2018)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 51.1 (out of 100)
View more at BridgeReports.com

Update Log 

  • January 13, 2015: New photos from Gene Smania
  • December 5, 2012: New photo from Steve Conro
  • April 12, 2010: New Street View added by Nathan Holth
  • January 15, 2009: Updated by Ian Anderson
  • January 10, 2009: Updated by Ian Anderson: This is actually a Continuous Through Truss, http://en.wikipedia.org/wiki/Lacon,_Illinois
  • January 9, 2006: Posted photos from Bill Burmaster



Lacon Bridge
Posted March 17, 2011, by Gene Smania

Bridge plate from Lacon Bridge.

Lacon Bridge
Posted March 12, 2011, by Gene Smania

The 1939 structure replaced a pontoon bridge across the Illinois River at Lacon. All photos are by Art Kistler, IDOT employee.

Lacon Bridge
Posted January 23, 2008, by Anthony (ascriven1 [at] juno [dot] com)

Functionally Obsolete does NOT mean unsafe or dangerous. It only means that the bridge is not built to modern standards. For example, the Murray Baker Bridge (I-74) in Peoria is listed as functionally obsolete because it has no shoulders, which are part of any new multi-lane interstate highway bridge. A bridge being listed as functionally obsolete does not mean that is is decrepit and going to fall down, it just means that it is outdated by today's standards. If maintained, it can last just as long as any other bridge.

Lacon Bridge
Posted October 1, 2007, by Anonymous

if it is functionally obsolete why not fix it so noone has to be hurt or killed before you do smoething??????????????????

Lacon Bridge
Posted January 27, 2007, by Jim Frazier (jim [at] jimfrazier [dot] com)

Here's a photo I took in December 2006