I-74 Bridge
Facts
- Overview
- Pair of suspension bridges over the Mississippi River on I-74 between Bettendorf and Moline
- Location
- Bettendorf, 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
- Builders
- - Kansas City Bridge Co. of Kansas City, Missouri (Substructure)
- McClintic-Marshall Co. of Chicago, Illinois & Pittsburgh, Pennsylvania (Superstructure)
- 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)
- Quadrangle map:
- Davenport East
- Average daily traffic (as of 2018)
- 36,300
- 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 report (as of August 2018)
- Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 48.5 (out of 100)
View more at BridgeReports.com
Update Log
- August 19, 2015: Updated by Luke: Added category "US 6" + two scans of a AAA pamphlet via Dave Darby
- February 22, 2015: Photo imported by Dave King
- January 24, 2015: New photos from Jason Smith
- 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
Related Bridges
- New I-74 Bridge (Successor)
Sources
- Nathan Morton - morton890 [at] yahoo [dot] com
- Kim Harvey
- I-74 Iowa-Illinois Corridor Study
- Quinn Phelan - qphelan [at] earthlink [dot] net
- Nathan Holth
- Luke
- Historicbridges.org - by Nathan Holth
- Jason Smith - flensburg [dot] bridgehunter [dot] av [at] googlemail [dot] com
Comments
EH...
I think it's time to add the new I-74 tied-arch bridge on bridgehunter since the westbound span is now finished and open to traffic.
https://www.kwqc.com/2020/11/13/iowa-bound-portion-of-new-i-...
It's been on the chopping block for the better part of a decade.
The bridge is unfortunately slated for demolition.
New bridge in progress. From Modjeski & Masters website:
http://www.modjeski.com/projects/detail.aspx?I-74-Mississipp...
US 6
A ground level view of the I-74 Bridge from the Iowa side.
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.
The Quad Cities Times posted an article with historic photos of the bridge:
http://qctimes.com/collection_e4850eda-6623-11e0-9c3f-001cc4...
This page's URL is http://bridgehunter.com/ia/scott/47280/
There's talk of preserving the pony truss section and toll plaza on the Illinois side of the river and converting it into a pier.
https://qctimes.com/news/local/more-talks-on-turning-toll-pl...