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I-74 Bridge

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Iowa shore looking north

Photo taken by Nathan Morton in Sept. 07

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Facts 

Overview
Pair of suspension bridges over the Mississippi River on I-74 between Bettendorf and Moline
Location
Scott County, Iowa, and Rock Island County, Illinois
Status
Open to traffic
Future prospects
Scheduled for demolition and replacement.
History
Northbound bridge built 1935; southbound built 1960; both rehabilitated 1975
Builder
- Ralph Modjeski of Bochnia, Poland (Chief Engineer)
Design
Wire suspension
Dimensions
Length of largest span: 739.9 ft.
Total length: 5,016.4 ft. (1.0 mi.)
Deck width: 23.3 ft.
Vertical clearance above deck: 18.0 ft.
Recognition
Eligible for the National Register of Historic Places
Also called
Iowa-Illinois Memorial Bridge
Approximate latitude, longitude
+41.51956, -90.51330   (decimal degrees)
41°31'10" N, 90°30'48" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/707492/4599421 (zone/easting/northing)
USGS topographic map
Davenport East
Inventory numbers
IA 47280 (Iowa bridge number)
IL 081-9901 (Illinois bridge number)
IL 081-9902 (Illinois bridge number)
BH 14376 (Bridgehunter.com ID)
Inspection (as of 07/2012)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 49.6 (out of 100)
Average daily traffic (as of 2011)
30,350

Update Log 

  • March 16, 2014: New photo from Luke Harden
  • November 28, 2012: Photo imported by Luke Harden
  • November 17, 2012: New photos from Luke Harden
  • July 28, 2012: Updated by Luke Harden: Edited name to what it is locally referred to as.
  • April 12, 2010: Updated by Nathan Holth: Updated bridge info.
  • March 3, 2009: New photo from Quinn Phelan
  • November 20, 2008: Updated by Kim Harvey
  • November 13, 2008: New photo from Nathan Morton

Sources 

Comments 

I-74 Bridge
Posted March 16, 2014, by David Sebben (nebbes61 [at] yahoo,com)

A ground level view of the I-74 Bridge from the Iowa side.

Uploaded file: JPEG image data, JFIF standard 1.01, 131242 bytes

Mississippi River I-74 Bridge
Posted May 14, 2012, by Andy

Here is another atricle on the funding for the bridge replacement. I know this has been in the works for a while and htey are already working on projects along I-74 to accomodate the replacement but I didn't knwo that the entire funding had not been finalized. It looks like this will still take a few more years to even start the construction.

http://www.dot.state.il.us/press/r051112.html

Mississippi River I-74 Bridge
Posted April 15, 2011, by Kim Harvey

The Quad Cities Times posted an article with historic photos of the bridge:

http://qctimes.com/collection_e4850eda-6623-11e0-9c3f-001cc4c002e0.html#0