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US20 Iowa River Bridge

Map 

Street View 

Description 

This bridge is significant because it was built with techniques that greatly reduced the impact on the sensitive wildlife area it crosses. The spans were built east of the crossing and "launched" across the valley when complete. This is the first large span in the US to use this technique.

For info and construction videos from HNTB go here:

http://www.iowadot.gov/iowariverbridge/1b_bridge.htm

Facts 

Overview
Girder bridge over Iowa River on US 20
Location
Hardin County, Iowa
Status
Open to traffic
History
Built 2003
Builders
- Howard, Needles, Tammen & Bergendoff Corporation of Kansas City, Kansas
- Iowa Department of Transportation of Ames, Iowa
- Jensen Construction Co. of Des Moines, Iowa & Sand Springs, Oklahoma
Design
Girder
Dimensions
Length of largest span: 302.2 ft.
Total length: 1,639.2 ft.
Deck width: 78.7 ft.
Approximate latitude, longitude
+42.43939, -93.07143   (decimal degrees)
42°26'22" N, 93°04'17" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/494125/4698565 (zone/easting/northing)
Quadrangle map:
Steamboat Rock
Average daily traffic (as of 2015)
8,300
Inventory numbers
IA 608350 (Iowa bridge number)
BH 58906 (Bridgehunter.com ID)
Inspection report (as of August 2016)
Overall condition: Good
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Very Good (8 out of 9)
Deck condition rating: Very Good (8 out of 9)
Sufficiency rating: 98.8 (out of 100)
View more at BridgeReports.com

Update Log 

  • August 9, 2014: New Street View added by Luke
  • November 29, 2013: Updated by Luke Harden: Corrected a builder
  • November 29, 2013: Added by Clark Vance

Sources 

  • Clark Vance - cvance [at] dogmail [dot] com
  • Luke