Centennial Bridge

Photos 

Elevation From West

Photo by Joe Elliott, Summer 1995, for HAER

View photos at Library of Congress

Map 

Street Views 

Bridge History & Facts 

Go to this link for some interesting facts...

http://en.wikipedia.org/wiki/Rock_Island_Centennial_Bridge

Facts 

Overview

Steel through arch bridge over the Mississippi River on US 67 between Davenport and Rock Island

Location

Rock Island, Scott County, Iowa, and Rock Island County, Illinois

Status

Open to traffic

History

Completed July 12, 1940; rehabilitated 1996; tolls removed May 2, 2003

Builders

- American Bridge Co. of New York
- Ash, Howard, Needles, & Tammen of Kansas City, Missouri (Designer)
- McCarthy Improvement Co. of Davenport, Iowa
- Ned L. Ashton of Iowa City, Iowa (Engineer)
- Priester Construction Co. of Davenport, Iowa

Design

This bridge is a major river span and was the first tied-arch span across the Mississippi River. The bridge was fabricated, and the superstructure built, by American Bridge Company, New York, one of the largest bridge companies in American history. The bridge's designer, Ned L. Ashton, was one of Iowa's most influential engineers.

Dimensions

Length of largest span: 538.1 ft.
Total length: 3,854.2 ft. (0.7 mi.)
Deck width: 45.9 ft.

Approximate latitude, longitude

+41.51517, -90.58163   (decimal degrees)
41°30'55" N, 90°34'54" W   (degrees°minutes'seconds")

Approximate UTM coordinates

15/701804/4598771 (zone/easting/northing)

Quadrangle map:

Davenport East

Inventory numbers

IA 47020 (Iowa bridge number)
BH 37423 (Bridgehunter.com ID)

Inspection (as of 07/2015)

Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 10.8 (out of 100)

Average daily traffic (as of 2014)

32,000

Categories 

Update Log 

• April 16, 2017: New photos from David Sebben
• February 22, 2015: Photo imported by Dave King
• August 4, 2014: Updated by Luke: Presently under construction
• July 27, 2013: New Street View added by Dave King
• September 8, 2012: Photo imported by Luke Harden
• August 18, 2012: Updated by Luke Harden: Added builders.
• May 27, 2012: Photo imported by Luke Harden
• October 8, 2011: Photo imported by Luke Harden
• July 21, 2011: New photos from J.R. Manning
• March 25, 2009: New photo from Quinn Phelan
• March 3, 2009: Essay added by Quinn Phelan
• September 13, 2008: Added by J.R. Manning

Sources 

• J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
• HAER IA-73 - Centennial Bridge
• Quinn Phelan - qphelan [at] earthlink [dot] net
• Wikipedia
• Luke
• Dave King - DKinghawkfan [at] hotmail [dot] com
• David Sebben

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